2005 Hummer H2 Owners Manual

the vehicle.

3. Guide the pins on the side step brackets into the

holes in the vehicle’s rocker panel protector brackets. If you have difficulty doing this, it may help to have someone hold up the step while you guide the pins into the holes. You will be guiding three pins into the holes with the fourth hole in the vehicle’s rocker panel protector brackets empty until the next step.

4-17

4. Thread the knob through the remaining hole — first

into the rocker panel protector and then into the threaded hole in the side step bracket.

Notice: Threading the knob into the side step and then into the rocker panel will not secure the step. The step could fall off the vehicle and be damaged. Always thread the knob through the rocker panel first. After the knob is installed, try moving the step left and right to be sure the step is secure.

5. Hand-tighten the knob by turning it clockwise until it is seated against the rocker panel protector bracket and then tighten it to 10 lb ft (13.5 Y) with the tool as shown.

4-18

6. Once the knob is

torqued, install the cotter pin through the hole in the end of the knob’s threaded shaft.

Tubular Side Steps

This will help prevent the knob from coming completely loose and falling out.

The driver’s side of the vehicle is shown with the body removed for clarity. To remove a step:

1. Remove the nuts and bolts attaching the step to

the vehicle.

2. Remove the step from the vehicle.

4-19

Loading Your Vehicle for Off-Road Driving There are some important things to remember about how to load your vehicle.

The heaviest things should be on the load floor and forward of your rear axle. Put heavier items in the rear area, as far forward as you can.

(cid:127) Be sure the load is secured properly, so driving on

the off-road terrain does not toss things around.

To install a step: 1. Before installing the bolts:

(cid:127) Remove all traces of the original adhesive patch. (cid:127) Clean the threads of the bolts with denatured alcohol or equivalent and allow threads to dry. (cid:127) Apply Threadlocker (GM Part No. 12345382, in

Canada 10953489) or equivalent.

2. Install the side step to the vehicle. You may need

someone to assist you in the installation.

3. Install the nuts and bolts for the two inner brackets

first, but do not tighten them.

4. Using a level, make sure the step is level in relationship to the vehicle. Then, tighten the inner bracket nuts and bolts.

5. Install the other nuts and bolts. Tighten all nuts and

bolts to 39 lb ft (50 Y).

4-20

(cid:127) {CAUTION:

(cid:127) Cargo on the load floor piled higher than

the seatbacks can be thrown forward during a sudden stop. You or your passengers could be injured. Keep cargo below the top of the seatbacks.

(cid:127) Unsecured cargo on the load floor can be

tossed about when driving over rough terrain. You or your passengers can be struck by flying objects. Secure the cargo properly.

(cid:127) Heavy loads on the roof raise the vehicle’s

center of gravity, making it more likely to roll over. You can be seriously or fatally injured if the vehicle rolls over. Put heavy loads inside the cargo area, not on the roof. Keep cargo in the cargo area as far forward and low as possible.

You will find other important information in this manual. See Loading Your Vehicle on page 4-58 and Tires on page 5-54.

Environmental Concerns Off-road driving can provide wholesome and satisfying recreation. However, it also raises environmental concerns. We recognize these concerns and urge every off-roader to follow these basic rules for protecting the environment: (cid:127) Always use established trails, roads and areas that

have been specially set aside for public off-road recreational driving; obey all posted regulations.

(cid:127) Avoid any driving practice that could damage

the environment — shrubs, flowers, trees, grasses — or disturb wildlife (this includes wheel-spinning, breaking down trees or unnecessary driving through streams or over soft ground).

(cid:127) Always carry a litter bag — make sure all refuse is

removed from any campsite before leaving. Take extreme care with open fires (where permitted), camp stoves and lanterns.

(cid:127) Never park your vehicle over dry grass or other combustible materials that could catch fire from the heat of the vehicle’s exhaust system.

4-21

(cid:127) Traveling to Remote Areas It makes sense to plan your trip, especially when going to a remote area. Know the terrain and plan your route. You are much less likely to get bad surprises. Get accurate maps of trails and terrain. Try to learn of any blocked or closed roads. It is also a good idea to travel with at least one other vehicle. If something happens to one of them, the other can help quickly. Does your vehicle have a winch? If so, be sure to read the winch instructions. In a remote area, a winch can be handy if you get stuck. But you will want to know how to use it properly. High Mobility Characteristics The HUMMER H2 has a 10 inch (25.4 cm) running ground clearance (A) and a 9 inch (22.8 cm) axle to ground clearance (B) while maintaining a low silhouette and a low center of gravity.

4-22

The HUMMER H2 has an approximate approach angle (A) of 42° and a departure angle (B) of 37°, depending on suspension packages.

Design specifications required a minimum gradeability of 60% (31°) slope, with the vehicle fully loaded, on high friction surfaces at 6 mph (9.7 km/h). The vehicle is expected to traverse this grade only for short durations. Never stop and idle the vehicle or park it on this grade.

4-23

Also, your vehicle should be able to traverse a 40% (22°) side slope at 6 mph (9.7 km/h) while fully loaded on high friction surfaces.

Your vehicle can climb a 16 inch (40.6 cm) vertical step. Step climbing is best done by approaching the step at an angle rather than straight on.

4-24

Brake and Accelerator Operation Techniques for Off-Road Driving For logs, walls, rocks, severe ditches, hills, sand, etc. 1. Bring the vehicle to a complete stop. Do not rev

the engine.

2. Select the proper transmission and transfer case

gear range; usually FIRST (1) gear, 4LO LOCK for such obstacles.

3. If wheel spin is experienced, maintain steady throttle, with your foot off the brake pedal, to allow the TCS to control the wheel spin. TCS will not operate if the brakes are applied, even slightly.

4. If wheel spin cannot be controlled by the system,

fully press the brake pedal with your left foot so all wheel spin is halted.

5. Back away from the obstacle so that a new

approach can be tried.

6. As the first wheel crosses the obstacle, be prepared

to alternate the brake and accelerator pedal to maintain control and avoid tire drop-off from obstacles. Repeat this process for the other wheels.

For mounds, washouts, loose up-hill slopes, ditches, etc. When wheel spin occurs as the vehicle is moving, the driver may notice a slight shaking or shuddering of the vehicle. This should be stopped as soon as possible to prevent damage to vehicle components. This is the indication that a loss of traction is occurring on this terrain. The operator should: 1. Reduce speed and apply the brakes. 2. Assess the terrain properly and adjust vehicle

speed and gear ranges accordingly: 4HI position for higher speeds and 4LO LOCK for more torque and lower speeds. Transmission FIRST (1) gear is generally recommended.

3. Apply slight pressure to the brake when the shaking or shuddering sensation is felt, keeping the vehicle moving in a controlled manner.

4. Be prepared to alternate between braking and

accelerating through the adverse terrain.

4-25

Getting Familiar with Off-Road Driving It is a good idea to practice in an area that is safe and close to home before you go into the wilderness. Off-road driving does require some new and different skills. Here is what we mean. Tune your senses to different kinds of signals. Your eyes, for example, need to constantly sweep the terrain for unexpected obstacles. Your ears need to listen for unusual tire or engine sounds. With your arms, hands, feet and body, you will need to respond to vibrations and vehicle bounce. Controlling your vehicle is the key to successful off-road driving. One of the best ways to control your vehicle is to control your speed. Here are some things to keep in mind. At higher speeds:

you approach things faster and you have less time to scan the terrain for obstacles. you have less time to react. you have more vehicle bounce when you drive over obstacles. you will need more distance for braking, especially since you are on an unpaved surface.

{CAUTION:

When you are driving off-road, bouncing and quick changes in direction can easily throw you out of position. This could cause you to lose control and crash. So, whether you’re driving on or off the road, you and your passengers should wear safety belts.

Scanning the Terrain Off-road driving can take you over many different kinds of terrain. You need to be familiar with the terrain and its many different features. Here are some things to consider.

Surface Conditions: Off-roading can take you over hard-packed dirt, gravel, rocks, grass, sand, mud, snow or ice. Each of these surfaces affects the steering, acceleration and braking of your vehicle in different ways. Depending upon the kind of surface you are on, you may experience slipping, sliding, wheel spinning, delayed acceleration, poor traction and longer braking distances.

4-26

(cid:127) (cid:127) (cid:127) (cid:127) Surface Obstacles: Unseen or hidden obstacles can be hazardous. A rock, log, hole, rut or bump can startle you if you are not prepared for them. Often these obstacles are hidden by grass, bushes, snow or even the rise and fall of the terrain itself. Here are some things to consider:

Is the path ahead clear?

(cid:127) Will the surface texture change abruptly up ahead? (cid:127) Does the travel take you uphill or downhill?

(There is more discussion of these subjects later.)

(cid:127) Will you have to stop suddenly or change

direction quickly?

When you drive over obstacles or rough terrain, keep a firm grip on the steering wheel. Ruts, troughs or other surface features can jerk the wheel out of your hands if you are not prepared. When possible, it is a good practice to survey the landscape ahead on foot prior to driving to observe hidden obstacles.

When you drive over bumps, rocks, or other obstacles, your wheels can leave the ground. If this happens, even with one or two wheels, you cannot control the vehicle as well or at all. Because you will be on an unpaved surface, it is especially important to avoid sudden acceleration, sudden turns or sudden braking. In a way, off-road driving requires a different kind of alertness from driving on paved roads and highways. There are no road signs, posted speed limits or signal lights. You have to use your own good judgment about what is safe and what is not. Drinking and driving can be very dangerous on any road. And this is certainly true for off-road driving. At the very time you need special alertness and driving skills, your reflexes, perceptions and judgment can be affected by even a small amount of alcohol. You could have a serious — or even fatal — accident if you drink and drive or ride with a driver who has been drinking. See Drunken Driving on page 4-2.

4-27

(cid:127) Crossing Obstacles Approach Angle — a Key to Mobility If you encounter a large dip in the terrain, do not enter straight on; enter at an angle — 15° minimum approach (A), 75° maximum approach angle (B). For very large dips, ditches or small washes, coast in, using the engine as a brake (transmission and transfer case lowest gears). Then, use the low ranges in the transmission and transfer case to power out.

Roll Your Tires Over Large Rocks

Do not straddle large rocks; drive over them, letting the tire envelop the rock. The tread of the tire is thicker and tougher than the sidewall of the tire and is more resilient to impact than underbody components.

4-28

Log Crossing Using the proper technique, your vehicle will cross logs up to 10 inches (25.4 cm) in diameter. Approach the log at approximately a 15° angle (A) with the transmission in FIRST (1) and the transfer case in 4LO LOCK and “walk” your vehicle over, one tire at a time. As with all obstacles, face your tires perpendicular to the object for best traction and tire life. It may be necessary to modulate your brake pedal and accelerator to avoid spin-out. Ease the vehicle down from the log with your brake.

Driving on Off-Road Hills Off-road driving often takes you up, down or across a hill. Driving safely on hills requires good judgment and an understanding of what your vehicle can and cannot do. There are some hills that simply cannot be driven, no matter how well built the vehicle.

{CAUTION:

Many hills are simply too steep for any vehicle. If you drive up them, you will stall. If you drive down them, you cannot control your speed. If you drive across them, you will roll over. You could be seriously injured or killed. If you have any doubt about the steepness, do not drive the hill.

4-29

Approaching a Hill When you approach a hill, you need to decide if it is one of those hills that is just too steep to climb, descend or cross. Steepness can be hard to judge. On a very small hill, for example, there may be a smooth, constant incline with only a small change in elevation where you can easily see all the way to the top. On a large hill, the incline may get steeper as you near the top, but you may not see this because the crest of the hill is hidden by bushes, grass or shrubs. Here are some other things to consider as you approach a hill:

Is there a constant incline, or does the hill get sharply steeper in places? Is there good traction on the hillside, or will the surface cause tire slipping? Is there a straight path up or down the hill so you will not have to make turning maneuvers?

(cid:127) Are there obstructions on the hill that can block

your path (boulders, trees, logs or ruts)?

(cid:127) What is beyond the hill? Is there a cliff, an

embankment, a drop-off, a fence? Get out and walk the hill if you do not know. It is the smart way to find out. Is the hill simply too rough? Steep hills often have ruts, gullies, troughs and exposed rocks because they are more susceptible to the effects of erosion.

Driving Uphill Once you decide you can safely drive up the hill, you need to take some special steps: (cid:127) Use transmission and transfer case low gear and

get a firm grip on the steering wheel.

(cid:127) Get a smooth start up the hill and try to maintain

your speed. Do not use more power than you need, because you do not want your wheels to start spinning or sliding. Let the traction system work to control any wheel slippage. The traction control system allows for moderate wheel spin with some capability to dig in and power up the hill.

4-30

(cid:127) (cid:127) (cid:127) (cid:127) (cid:127) (cid:127) Do not continue if the vehicle shudders or

exhibits suspension hopping. This can cause damage to the driveline or suspension components. Improper driving technique is not covered by your vehicle warranty. Try to drive straight up the hill if at all possible. If the path twists and turns, you might want to find another route.

(cid:127) Ease up on your speed as you approach the top of

the hill.

(cid:127) Attach a flag to the vehicle to make you more visible to approaching traffic on trails or hills.

(cid:127) Sound the horn as you approach the top of the hill

to let opposing traffic know you are there.

(cid:127) Use your headlamps even during the day. They

make you more visible to oncoming traffic.

{CAUTION:

Turning or driving across steep hills can be dangerous. You could lose traction, slide sideways, and possibly roll over. You could be seriously injured or killed. When driving up hills, always try to go straight up.

{CAUTION:

Driving to the top (crest) of a hill at full speed can cause an accident. There could be a drop-off, embankment, cliff, or even another vehicle. You could be seriously injured or killed. As you near the top of a hill, slow down and stay alert.

4-31

(cid:127) Here are some things you must not do if you stall, or are about to stall, when going up a hill: (cid:127) Never attempt to prevent a stall by shifting into NEUTRAL (N) to “rev-up” the engine and regain forward momentum. This will not work. Your vehicle will roll backwards very quickly and you could go out of control. Instead, apply the regular brake to stop the vehicle. Then apply the parking brake. Shift to REVERSE (R), release the parking brake, and slowly back straight down.

(cid:127) Never attempt to turn around if you are about to

stall when going up a hill. If the hill is steep enough to stall your vehicle, it is steep enough to cause you to roll over if you turn around. If you cannot make it up the hill, you must back straight down the hill.

Q: What should I do if my vehicle stalls, or is about to stall, and I cannot make it up the hill?

A: If this happens, there are some things you should do, and there are some things you must not do. First, here is what you should do:

(cid:127) Push the brake pedal to stop the vehicle and keep it from rolling backwards. Also, apply the parking brake. If your engine is still running, shift the transmission to REVERSE (R), release the parking brake, and slowly back down the hill in REVERSE (R). If your engine has stopped running, you will need to restart it. With the brake pedal pressed and the parking brake still applied, shift the transmission to PARK (P) and restart the engine. Then, shift to REVERSE (R), release the parking brake, and slowly back down the hill as straight as possible in REVERSE (R).

(cid:127) As you are backing down the hill, put your left hand

on the steering wheel at the 12 o’clock position. This way, you will be able to tell if your wheels are straight and maneuver as you back down. It is best that you back down the hill with your wheels straight rather than in the left or right direction. Turning the wheel too far to the left or right will increase the possibility of a rollover.

4-32

(cid:127) (cid:127) Driving Downhill When off-roading takes you downhill, you will want to consider a number of things: (cid:127) How steep is the downhill? Will I be able to maintain

vehicle control?

(cid:127) What is the surface like? Smooth? Rough?

Slippery? Hard-packed dirt? Gravel?

(cid:127) Are there hidden surface obstacles? Ruts?

Logs? Boulders?

(cid:127) What is at the bottom of the hill? Is there a

hidden creek bank or even a river bottom with large rocks?

Q: Suppose, after stalling, I try to back down the hill and decide I just cannot do it. What should I do?

A: Set the parking brake, put your transmission in

PARK (P) and turn off the engine. Leave the vehicle and go get some help. Exit on the uphill side and stay clear of the path the vehicle would take if it rolled downhill. Do not shift the transfer case to NEUTRAL when you leave the vehicle. Leave it in some gear.

{CAUTION:

Shifting the transfer case to NEUTRAL can cause your vehicle to roll even if the transmission is in PARK (P). This is because the NEUTRAL position on the transfer case overrides the transmission. You or someone else could be injured. If you are going to leave your vehicle, set the parking brake and shift the transmission to PARK (P). But do not shift the transfer case to NEUTRAL. Leave the transfer case in the 4 HI, 4 HI Lock or 4 LO Lock position.

4-33

If you decide you can go down a hill safely, then try to keep your vehicle headed straight down, and use a low gear. This way, engine drag can help your brakes and they will not have to do all the work. Descend slowly, keeping your vehicle under control at all times.

Q: Are there some things I should not do when

driving down a hill?

A: Yes! These are important because if you

ignore them you could lose control and have a serious accident:

{CAUTION:

Heavy braking when going down a hill can cause your brakes to overheat and fade. This could cause loss of control and a serious accident. Apply the brakes lightly when descending a hill and use a low gear to keep vehicle speed under control.

4-34

(cid:127) When driving downhill, avoid turns that take you across the incline of the hill. A hill that is not too steep to drive down may be too steep to drive across. You could roll over if you do not drive straight down.

(cid:127) Never go downhill with the transmission in

NEUTRAL (N). This is called “free-wheeling.” Your brakes will have to do all the work and could overheat and fade.

Q: Am I likely to stall when going downhill? A: It is much more likely to happen going uphill. But if

it happens going downhill, here is what to do:

1. Stop your vehicle by applying the regular brakes.

Apply the parking brake.

2. Shift to PARK (P) and, while still braking, restart

the engine.

3. Shift back to a low gear, release the parking brake,

and drive straight down.

4. If the engine will not start, get out and get help.

Driving Across an Incline Sooner or later, an off-road trail will probably go across the incline of a hill. If this happens, you have to decide whether to try to drive across the incline. Here are some things to consider: (cid:127) A hill that can be driven straight up or down may be too steep to drive across. When you go straight up or down a hill, the length of the wheel base (the distance from the front wheels to the rear wheels) reduces the likelihood the vehicle will tumble end over end. But when you drive across an incline, the much more narrow track width (the distance between the left and right wheels) may not prevent the vehicle from tilting and rolling over. Also, driving across an incline puts more weight on the downhill wheels. This could cause a downhill slide or a rollover.

(cid:127) Surface conditions can be a problem when you drive across a hill. Loose gravel, muddy spots, or even wet grass can cause your tires to slip sideways, downhill. If the vehicle slips sideways, it can hit something that will trip it (a rock, a rut, etc.) and roll over.

(cid:127) Hidden obstacles can make the steepness of the

incline even worse. If you drive across a rock with the uphill wheels, or if the downhill wheels drop into a rut or depression, your vehicle can tilt even more.

For reasons like these, you need to decide carefully whether to try to drive across an incline. Just because the trail goes across the incline does not mean you have to drive it. The last vehicle to try it might have rolled over.

{CAUTION:

Driving across an incline that is too steep will make your vehicle roll over. You could be seriously injured or killed. If you have any doubt about the steepness of the incline, do not drive across it. Find another route instead.

Q: What if I am driving across an incline that is not too steep, but I hit some loose gravel and start to slide downhill. What should I do?

A: If you feel your vehicle starting to slide sideways, turn downhill. This should help straighten out the vehicle and prevent the side slipping. However, a much better way to prevent this is to get out and “walk the course” so you know what the surface is like before you drive it.

4-35

Stalling on an Incline If your vehicle stalls when you are crossing an incline, be sure you (and your passengers) get out on the uphill side, even if the door there is harder to open. If you get out on the downhill side and the vehicle starts to roll over, you will be right in its path. If you have to walk down the slope, stay out of the path the vehicle will take if it does roll over.

{CAUTION:

Getting out on the downhill (low) side of a vehicle stopped across an incline is dangerous. If the vehicle rolls over, you could be crushed or killed. Always get out on the uphill (high) side of the vehicle and stay well clear of the rollover path.

Driving in Mud, Sand, Snow or Ice When you drive in mud, snow or sand, your wheels will not get good traction. You cannot accelerate as quickly, turning is more difficult, and you will need longer braking distances. It is best to use a low gear when you are in mud — the deeper the mud, the lower the gear. In really deep mud, the idea is to keep your vehicle moving so you do not get stuck. Be careful to keep mud from building up and washing onto the engine cooling system.

4-36

When you drive on sand, you will sense a change in wheel traction. But it will depend upon how loosely packed the sand is. On loosely packed sand (as on beaches or sand dunes) your tires will tend to sink into the sand. This has an effect on steering, accelerating and braking. Drive at a reduced speed and avoid sharp turns or abrupt maneuvers. Hard packed snow and ice offer the worst tire traction. On these surfaces, it is very easy to lose control. On wet ice, for example, the traction is so poor that you will have difficulty accelerating. And if you do get moving, poor steering and difficult braking can cause you to slide out of control.

{CAUTION:

Driving on frozen lakes, ponds or rivers can be dangerous. Underwater springs, currents under the ice, or sudden thaws can weaken the ice. Your vehicle could fall through the ice and you and your passengers could drown. Drive your vehicle on safe surfaces only.

Driving in Water Heavy rain can mean flash flooding, and flood waters demand extreme caution. Find out how deep the water is before you drive through it. If it is deep enough to cover your wheel hubs, axles or exhaust pipe, do not try it — you probably will not get through. Also, water that deep can damage your axle and other vehicle parts. Your vehicle is capable of depths up to 20 inches. Know how to judge whether the water is deeper than this before proceeding into it.

4-37

After Off-Road Driving Remove any brush or debris that has collected on the underbody, chassis or under the hood. These accumulations can be a fire hazard. After operation in mud or sand, have the brake linings cleaned and checked. These substances can cause glazing and uneven braking. Check the engine and oil coolers for mud accumulation. Thoroughly and carefully clean these devices to allow proper cooling. Check the body structure, steering, suspension, wheels, tires and exhaust system for damage. Also, check the fuel lines and cooling system for any leakage. Your vehicle will require more frequent service due to off-road use. Refer to the Maintenance Schedule for additional information.

If the water is not too deep, drive slowly through it. At faster speeds, water splashes on your ignition system and your vehicle can stall. Stalling can also occur if you get your tailpipe under water. And, as long as your tailpipe is under water, you will never be able to start your engine. When you go through water, remember that when your brakes get wet, it may take you longer to stop.

{CAUTION:

Driving through rushing water can be dangerous. Deep water can sweep your vehicle downstream and you and your passengers could drown. If it is only shallow water, it can still wash away the ground from under your tires, and you could lose traction and roll the vehicle over. Do not drive through rushing water.

See Driving in Rain and on Wet Roads on page 4-40 for more information on driving through water.

4-38

Driving at Night

Night driving is more dangerous than day driving. One reason is that some drivers are likely to be impaired — by alcohol or drugs, with night vision problems, or by fatigue. Here are some tips on night driving. (cid:127) Drive defensively. (cid:127) Do not drink and drive.

(cid:127) Adjust your inside rearview mirror to reduce the

glare from headlamps behind you.

(cid:127) Since you cannot see as well, you may need to slow down and keep more space between you and other vehicles.

(cid:127) Slow down, especially on higher speed roads. Your headlamps can light up only so much road ahead. In remote areas, watch for animals. If you are tired, pull off the road in a safe place and rest.

No one can see as well at night as in the daytime. But as we get older these differences increase. A 50-year-old driver may require at least twice as much light to see the same thing at night as a 20-year-old. What you do in the daytime can also affect your night vision. For example, if you spend the day in bright sunshine you are wise to wear sunglasses. Your eyes will have less trouble adjusting to night. But if you are driving, do not wear sunglasses at night. They may cut down on glare from headlamps, but they also make a lot of things invisible.

4-39

(cid:127) (cid:127) You can be temporarily blinded by approaching headlamps. It can take a second or two, or even several seconds, for your eyes to re-adjust to the dark. When you are faced with severe glare, as from a driver who does not lower the high beams, or a vehicle with misaimed headlamps, slow down a little. Avoid staring directly into the approaching headlamps. Keep your windshield and all the glass on your vehicle clean — inside and out. Glare at night is made much worse by dirt on the glass. Even the inside of the glass can build up a film caused by dust. Dirty glass makes lights dazzle and flash more than clean glass would, making the pupils of your eyes contract repeatedly. Remember that your headlamps light up far less of a roadway when you are in a turn or curve. Keep your eyes moving; that way, it is easier to pick out dimly lighted objects. Just as your headlamps should be checked regularly for proper aim, so should your eyes be examined regularly. Some drivers suffer from night blindness — the inability to see in dim light — and are not even aware of it.

4-40

Driving in Rain and on Wet Roads

Rain and wet roads can mean driving trouble. On a wet road, you cannot stop, accelerate, or turn as well because your tire-to-road traction is not as good as on dry roads. And, if your tires do not have much tread left, you will get even less traction. It is always wise to go slower and be cautious if rain starts to fall while you are driving. The surface may get wet suddenly when your reflexes are tuned for driving on dry pavement.

The heavier the rain, the harder it is to see. Even if your windshield wiper blades are in good shape, a heavy rain can make it harder to see road signs and traffic signals, pavement markings, the edge of the road, and even people walking. It is wise to keep your wiping equipment in good shape and keep your windshield washer tank filled with washer fluid. Replace your windshield wiper inserts when they show signs of streaking or missing areas on the windshield, or when strips of rubber start to separate from the inserts.

Driving too fast through large water puddles or even going through some car washes can cause problems, too. The water may affect your brakes. Try to avoid puddles. But if you cannot, try to slow down before you hit them.

{CAUTION:

Wet brakes can cause accidents. They will not work as well in a quick stop and may cause pulling to one side. You could lose control of the vehicle. After driving through a large puddle of water or a car wash, apply your brake pedal lightly until your brakes work normally.

4-41

Hydroplaning Hydroplaning is dangerous. So much water can build up under your tires that they can actually ride on the water. This can happen if the road is wet enough and you are going fast enough. When your vehicle is hydroplaning, it has little or no contact with the road. Hydroplaning does not happen often. But it can if your tires do not have much tread or if the pressure in one or more is low. It can happen if a lot of water is standing on the road. If you can see reflections from trees, telephone poles, or other vehicles, and raindrops dimple the water’s surface, there could be hydroplaning. Hydroplaning usually happens at higher speeds. There just is not a hard and fast rule about hydroplaning. The best advice is to slow down when it is raining. Driving Through Deep Standing Water Notice: If you drive too quickly through deep puddles or standing water, water can come in through your engine’s air intake and badly damage your engine. Never drive through water that is slightly lower than the underbody of your vehicle. If you cannot avoid deep puddles or standing water, drive through them very slowly.

Driving Through Flowing Water

{CAUTION:

Flowing or rushing water creates strong forces. If you try to drive through flowing water, as you might at a low water crossing, your vehicle can be carried away. As little as six inches of flowing water can carry away a smaller vehicle. If this happens, you and other vehicle occupants could drown. Do not ignore police warning signs, and otherwise be very cautious about trying to drive through flowing water.

Some Other Rainy Weather Tips (cid:127) Besides slowing down, allow some extra following

distance. And be especially careful when you pass another vehicle. Allow yourself more clear room ahead, and be prepared to have your view restricted by road spray.

(cid:127) Have good tires with proper tread depth. See Tires

on page 5-54.

4-42

City Driving

Here are ways to increase your safety in city driving: (cid:127) Know the best way to get to where you are going. Get a city map and plan your trip into an unknown part of the city just as you would for a cross-country trip. Try to use the freeways that rim and crisscross most large cities. You will save time and energy. See Freeway Driving on page 4-44. Treat a green light as a warning signal. A traffic light is there because the corner is busy enough to need it. When a light turns green, and just before you start to move, check both ways for vehicles that have not cleared the intersection or may be running the red light.

One of the biggest problems with city streets is the amount of traffic on them. You will want to watch out for what the other drivers are doing and pay attention to traffic signals.

4-43

(cid:127) (cid:127) Freeway Driving

Mile for mile, freeways—also called thruways, parkways, expressways, turnpikes, or superhighways — are the safest of all roads. But they have their own special rules. The most important advice on freeway driving is: Keep up with traffic and keep to the right. Drive at the same speed most of the other drivers are driving. Too-fast or too-slow driving breaks a smooth traffic flow. Treat the left lane on a freeway as a passing lane.

4-44

At the entrance, there is usually a ramp that leads to the freeway. If you have a clear view of the freeway as you drive along the entrance ramp, you should begin to check traffic. Try to determine where you expect to blend with the flow. Try to merge into the gap at close to the prevailing speed. Switch on your turn signal, check your mirrors, and glance over your shoulder as often as necessary. Try to blend smoothly with the traffic flow. Once you are on the freeway, adjust your speed to the posted limit or to the prevailing rate if it is slower. Stay in the right lane unless you want to pass. Before changing lanes, check your mirrors. Then use your turn signal. Just before you leave the lane, glance quickly over your shoulder to make sure there is not another vehicle in your blind spot. Once you are moving on the freeway, make certain you allow a reasonable following distance. Expect to move slightly slower at night. When you want to leave the freeway, move to the proper lane well in advance. If you miss your exit, do not, under any circumstances, stop and back up. Drive on to the next exit. The exit ramp can be curved, sometimes quite sharply. The exit speed is usually posted.

Reduce your speed according to your speedometer, not to your sense of motion. After driving for any distance at higher speeds, you may tend to think you are going slower than you actually are.

Before Leaving on a Long Trip Make sure you are ready. Try to be well rested. If you must start when you are not fresh — such as after a day’s work — do not plan to make too many miles that first part of the journey. Wear comfortable clothing and shoes you can easily drive in. Is your vehicle ready for a long trip? If you keep it serviced and maintained, it is ready to go. If it needs service, have it done before starting out. Of course, you will find experienced and able service experts in GM dealerships all across North America. They will be ready and willing to help if you need it.

Here are some things you can check before a trip: (cid:127) Windshield Washer Fluid: Is the reservoir full? Are

all windows clean inside and outside?

(cid:127) Wiper Blades: Are they in good shape?

Fuel, Engine Oil, Other Fluids: Have you checked all levels? Lamps: Are they all working? Are the lenses clean? Tires: They are vitally important to a safe, trouble-free trip. Is the tread good enough for long-distance driving? Are the tires all inflated to the recommended pressure?

(cid:127) Weather Forecasts: What is the weather outlook

along your route? Should you delay your trip a short time to avoid a major storm system?

(cid:127) Maps: Do you have up-to-date maps?

4-45

(cid:127) (cid:127) (cid:127) Hill and Mountain Roads

Driving on steep hills or mountains is different from driving in flat or rolling terrain.

Highway Hypnosis Is there actually such a condition as highway hypnosis? Or is it just plain falling asleep at the wheel? Call it highway hypnosis, lack of awareness, or whatever. There is something about an easy stretch of road with the same scenery, along with the hum of the tires on the road, the drone of the engine, and the rush of the wind against the vehicle that can make you sleepy. Do not let it happen to you! If it does, your vehicle can leave the road in less than a second, and you could crash and be injured. What can you do about highway hypnosis? First, be aware that it can happen. Then here are some tips: (cid:127) Make sure your vehicle is well ventilated, with a

comfortably cool interior.

(cid:127) Keep your eyes moving. Scan the road ahead and

to the sides. Check your mirrors and your instruments frequently. If you get sleepy, pull off the road into a rest, service, or parking area and take a nap, get some exercise, or both. For safety, treat drowsiness on the highway as an emergency.

4-46

(cid:127) If you drive regularly in steep country, or if you are planning to visit there, here are some tips that can make your trips safer and more enjoyable. See Off-Road Driving on page 4-16 for information about driving off-road. (cid:127) Keep your vehicle in good shape. Check all fluid levels and also the brakes, tires, cooling system, and transmission. These parts can work hard on mountain roads.

(cid:127) Know how to go down hills. The most important thing to know is this: let your engine do some of the slowing down. Shift to a lower gear when you go down a steep or long hill.

{CAUTION:

If you do not shift down, your brakes could get so hot that they would not work well. You would then have poor braking or even none going down a hill. You could crash. Shift down to let your engine assist your brakes on a steep downhill slope.

{CAUTION:

Coasting downhill in NEUTRAL (N) or with the ignition off is dangerous. Your brakes will have to do all the work of slowing down. They could get so hot that they would not work well. You would then have poor braking or even none going down a hill. You could crash. Always have your engine running and your vehicle in gear when you go downhill.

4-47

Winter Driving

(cid:127) Know how to go uphill. You may want to shift down

to a lower gear. The lower gears help cool your engine and transmission, and you can climb the hill better.

(cid:127) Stay in your own lane when driving on two-lane roads in hills or mountains. Do not swing wide or cut across the center of the road. Drive at speeds that let you stay in your own lane.

(cid:127) As you go over the top of a hill, be alert. There

could be something in your lane, like a stalled car or an accident.

(cid:127) You may see highway signs on mountains that

warn of special problems. Examples are long grades, passing or no-passing zones, a falling rocks area, or winding roads. Be alert to these and take appropriate action.

Here are some tips for winter driving: (cid:127) Have your vehicle in good shape for winter. (cid:127) You may want to put winter emergency supplies in

your vehicle.

Also see Tires on page 5-54.

4-48

Include an ice scraper, a small brush or broom, a supply of windshield washer fluid, a rag, some winter outer clothing, a small shovel, a flashlight, a red cloth, and a couple of reflective warning triangles. And, if you will be driving under severe conditions, include a small bag of sand, a piece of old carpet or a couple of burlap bags to help provide traction. Be sure you properly secure these items in your vehicle. Driving on Snow or Ice Most of the time, those places where your tires meet the road probably have good traction. However, if there is snow or ice between your tires and the road, you can have a very slippery situation. You will have a lot less traction, or grip, and will need to be very careful.

What is the worst time for this? Wet ice. Very cold snow or ice can be slick and hard to drive on. But wet ice can be even more trouble because it may offer the least traction of all. You can get wet ice when it is about freezing (32°F; 0°C) and freezing rain begins to fall. Try to avoid driving on wet ice until salt and sand crews can get there. Whatever the condition — smooth ice, packed, blowing, or loose snow — drive with caution.

4-49

Your Traction Control System will help you to maintain control of the vehicle when you accelerate on a slippery road. If you are driving in deep snow, turn your traction system to the TC2 mode. It will improve your ability to accelerate. See If You Are Stuck: In Sand, Mud, Ice or Snow on page 4-52. Even though your vehicle has a traction system, you will want to slow down and adjust your driving to the road conditions. See Traction Control System (TCS) on page 4-9. Your anti-lock brakes improve your vehicle’s stability when you make a hard stop on a slippery road. Even though you have an anti-lock braking system, you will want to begin stopping sooner than you would on dry pavement. See Anti-Lock Brake System (ABS) on page 4-7. (cid:127) Allow greater following distance on any

slippery road.

(cid:127) Watch for slippery spots. The road might be fine

until you hit a spot that is covered with ice. On an otherwise clear road, ice patches may appear in shaded areas where the sun cannot reach: around clumps of trees, behind buildings, or under bridges. Sometimes the surface of a curve or an overpass may remain icy when the surrounding roads are clear. If you see a patch of ice ahead of you, brake before you are on it. Try not to brake while you’re actually on the ice, and avoid sudden steering maneuvers.

4-50

If You Are Caught in a Blizzard

If you are stopped by heavy snow, you could be in a serious situation. You should probably stay with your vehicle unless you know for sure that you are near help and you can hike through the snow. Here are some things to do to summon help and keep yourself and your passengers safe:

Turn on your hazard flashers. Tie a red cloth to your vehicle to alert police that you have been stopped by the snow.

(cid:127) (cid:127) (cid:127) Put on extra clothing or wrap a blanket around you.

If you have no blankets or extra clothing, make body insulators from newspapers, burlap bags, rags, floor mats — anything you can wrap around yourself or tuck under your clothing to keep warm.

You can run the engine to keep warm, but be careful.

{CAUTION:

Snow can trap exhaust gases under your vehicle. This can cause deadly CO (carbon monoxide) gas to get inside. CO could overcome you and kill you. You cannot see it or smell it, so you might not know it is in your vehicle. Clear away snow from around the base of your vehicle, especially any that is blocking your exhaust pipe. And check around again from time to time to be sure snow does not collect there. Open a window just a little on the side of the vehicle that is away from the wind. This will help keep CO out.

Run your engine only as long as you must. This saves fuel. When you run the engine, make it go a little faster than just idle. That is, push the accelerator slightly. This uses less fuel for the heat that you get and it keeps the battery charged. You will need a well-charged battery to restart the vehicle, and possibly for signaling later on with your headlamps. Let the heater run for a while.

4-51

Then, shut the engine off and close the window almost all the way to preserve the heat. Start the engine again and repeat this only when you feel really uncomfortable from the cold. But do it as little as possible. Preserve the fuel as long as you can. To help keep warm, you can get out of the vehicle and do some fairly vigorous exercises every half hour or so until help comes.

If You Are Stuck: In Sand, Mud, Ice or Snow In order to free your vehicle when it is stuck, you will need to spin the wheels, but you do not want to spin your wheels too fast. The method known as rocking can help you get out when you are stuck, but you must use caution.

{CAUTION:

If you let your tires spin at high speed, they can explode, and you or others could be injured. And, the transmission or other parts of the vehicle can overheat. That could cause an engine compartment fire or other damage. When you are stuck, spin the wheels as little as possible. Do not spin the wheels above 35 mph (55 km/h) as shown on the speedometer.

Notice: Spinning your wheels can destroy parts of your vehicle as well as the tires. If you spin the wheels too fast while shifting your transmission back and forth, you can destroy your transmission. For more information about using tire chains on your vehicle, see Tire Chains on page 5-67.

4-52

Rocking Your Vehicle to Get It Out First, turn your steering wheel left and right. That will clear the area around your front wheels. Your vehicle has a Traction Control System that will activate when the system senses that the wheels are spinning. See Traction Control System (TCS) on page 4-9 for more information. Then, with the wheels straight ahead, shift back and forth between REVERSE (R) and a forward gear, spinning the wheels as little as possible. Release the accelerator pedal while you shift, and press lightly on the accelerator pedal when the transmission is in gear. By slowly spinning your wheels in the forward and reverse directions, you will cause a rocking motion that may free your vehicle. If that does not get you out after a few tries, you may need to be towed out. Or, you can use your recovery loops. If you do need to be towed out, see Towing Your Vehicle on page 4-64.

Recovery Loops

Front of Vehicle

4-53

Your vehicle may be equipped with recovery loops at the front and rear of your vehicle. You may need to use them if you are stuck off-road and need to be pulled to some place where you can continue driving.

{CAUTION:

These loops, when used, are under a lot of force. Keep people away from the vicinity of the loops and any chains or cables during use. Always pull the vehicle straight out. Never pull on the loops at a sideways angle. The loops could break off and you or others could be injured from the chain or cable snapping back.

Notice: Never use the recovery loops to tow the vehicle. Your vehicle could be damaged and it would not be covered by warranty.

Rear of Vehicle

4-54

First Aid Kit and Tool Kit The first aid and tool kit is located in the storage bin behind the spare tire on SUV models. It is held in place with a hook and loop fastener strap. On SUT models, the kit is in the rear cargo compartment on the passenger side of the vehicle.

The kit includes a first aid kit, a flashlight, a tire pressure gage, and a multi-purpose tool set.

The tire pressure gage has a reset button in the gage stem. After taking a pressure reading, press the button to reset the gage to zero.

4-55

You can use the receiver with a power winch platform (described later in this section) or with other accessories. Never use the front mounted receiver to tow a trailer. You can use the front mounted receiver to tow your vehicle behind another. See Recreational Vehicle Towing on page 4-64. Receiver Extension Use the receiver extension (if equipped) with the front mounted receiver and various light-duty accessories such as bike racks. Notice: Do not attach accessories or cargo that weigh more than 240 lbs. (108 kg) to the receiver extension. You could damage the receiver extension and/or your vehicle’s frame components. The receiver extension was not intended for heavy-duty use, such as trailer towing, winching or vehicle recovery.

Front Mounted Receiver

Your vehicle is equipped with a front mounted receiver.

4-56

To use the front mounted receiver with the receiver extension, do the following:

1. Locate the receiver extension (A) in the rear of the

vehicle where it is attached to the spare tire mounting plate.

2. Loosen the wing nuts (B) holding the extension to

the spare tire plate and remove it.

3. The extension attaches to the front receiver exactly

as the power winch platform does. See “Power Winch Platform” following in this section.

4. Attach the accessory you will be using to the

receiver extension.

Power Winch Platform You can use the power winch platform (if equipped) with an aftermarket winch. Connect the winch to the platform and wiring to the vehicle following the winch manufacturer’s guidelines. Notice: Do not use the winch platform to winch at a tension of more than 9,000 lbs. (4 082 kg). This would damage your vehicle’s frame. This damage would not be covered by your vehicle’s warranty. If you are using a winch to pull out another vehicle, follow the winch manufacturer’s guidelines and observe the following to prevent damage to your vehicle: If possible, have your vehicle anchored from the opposite side of the winch to a solid, immovable object. If winching from the front, use both of the rear recovery loops. If winching from the rear, use both of the front recovery loops.

(cid:127) Put your transmission in NEUTRAL (N). (cid:127) Use your regular brakes to hold your vehicle in place and block the wheels to keep the vehicle from moving.

4-57

(cid:127) Notice: Using a power winch with the transmission in gear to pull out another vehicle may damage the transmission. When operating a power winch, always leave the transmission in NEUTRAL (N). Notice: Driving your vehicle through an automatic car wash with the winch installed, can cause damage to your vehicle and the car wash. Always remove the winch from your vehicle before using an automatic car wash. See Washing Your Vehicle on page 5-96 for more information. If you are using a winch to pull out your own vehicle, follow the winch manufacturer’s guidelines for self recovery and observe the following to prevent damage to your vehicle: (cid:127) Do not self recover your vehicle by wrapping the winch cable around an object (such as a pulley block or tree) and attaching it back to your vehicle’s recovery loops.

(cid:127) Always attach the winch cable directly to a solid anchor directly in front of your vehicle to achieve a straight line pull.

Loading Your Vehicle It is very important to know how much weight your vehicle can carry. This weight is called the vehicle capacity weight and includes the weight of all occupants, cargo and all nonfactory-installed options. Two labels on your vehicle show how much weight it may properly carry, the Tire and Loading Information label and the Certification/Tire label.

{CAUTION:

Do not load your vehicle any heavier than the GVWR, or either the maximum front or rear GAWR. If you do, parts on your vehicle can break, and it can change the way your vehicle handles. These could cause you to lose control and crash. Also, overloading can shorten the life of your vehicle.

4-58

Tire and Loading Information Label

United States version shown, Canada similar

The Tire and Loading Information label is attached to the center pillar (B-pillar). With the driver’s door open, you will find the label attached below the door lock post (striker). The tire and loading information label shows the number of occupant seating positions (A), and the maximum vehicle capacity weight (B) in kilograms and pounds.

The Tire and Loading Information label also shows the size of the original equipment tires (C) and the recommended cold tire inflation pressures (D). For more information on tires and inflation see Tires on page 5-54
and Inflation - Tire Pressure on page 5-60. There is also important loading information on the vehicle Certification/Tire label. It tells you the Gross Vehicle Weight Rating (GVWR) and the Gross Axle Weight Rating (GAWR) for the front and rear axle. See “Certification/Tire Label” later in this section. Steps for Determining Correct Load Limit 1. Locate the statement “The combined weight of

occupants and cargo should never exceed XXX kg or XXX pounds” on your vehicle’s placard.

2. Determine the combined weight of the driver and

passengers that will be riding in your vehicle.

3. Subtract the combined weight of the driver and

passengers from XXX kilograms or XXX pounds.

4-59

4. The resulting figure equals the available amount of

cargo and luggage load capacity. For example, if the “XXX” amount equals 1400 lbs. and there will be five 150 lb. passengers in your vehicle, the amount of available cargo and luggage load capacity is 650 lbs. (1400 − 750
(5 x 150) = 650 lbs.).

5. Determine the combined weight of luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo and luggage load capacity calculated in Step 4.

6. If your vehicle will be towing a trailer, the load from

your trailer will be transferred to your vehicle. Consult this manual to determine how this reduces the available cargo and luggage load capacity of your vehicle.

See Towing a Trailer on page 4-68 for important information on towing a trailer, towing safety rules and trailering tips.

4-60

Example 1

Item

Description

Total

Vehicle Capacity Weight for Example 1 = Subtract Occupant Weight 150 lbs (68 kg) × 2 = Available Occupant and Cargo Weight =

1,000 lbs (453 kg)

300 lbs (136 kg)

700 lbs (317 kg)

Example 2

Example 3

Item

Description

Total

Item

Description

Total

Vehicle Capacity Weight for Example 2 = Subtract Occupant Weight 150 lbs (68 kg) × 5 = Available Cargo Weight =

1,000 lbs (453 kg)

750 lbs (340 kg)

250 lbs (113 kg)

Vehicle Capacity Weight for Example 3 = Subtract Occupant Weight 200 lbs (91 kg) × 5 = Available Cargo Weight =

1,000 lbs (453 kg)

1,000 lbs (453 kg)

0 lbs (0 kg)

Refer to your vehicle’s tire and loading information label for specific information about your vehicle’s capacity weight and seating positions. The combined weight of the driver, passengers and cargo should never exceed your vehicle’s capacity weight.

4-61

Certification/Tire Label

United States version shown, Canada similar

The Certification/Tire label is found on the rear edge of the driver’s door. The label shows the gross weight capacity of your vehicle. This is called the GVWR (Gross Vehicle Weight Rating). The GVWR includes the weight of the vehicle, all occupants, fuel and cargo. The Certification/Tire label also tells you the maximum weights for the front and rear axles, called Gross Axle Weight Rating (GAWR). To find out the actual loads on your front and rear axles, you need to go to a

4-62

weigh station and weigh your vehicle. Your dealer can help you with this. Be sure to spread out your load equally on both sides of the centerline. Never exceed the GVWR for your vehicle, or the GAWR for either the front or rear axle. And, if you do have a heavy load, you should spread it out.

{CAUTION:

Do not load your vehicle any heavier than the GVWR, or either the maximum front or rear GAWR. If you do, parts on your vehicle can break, and it can change the way your vehicle handles. These could cause you to lose control and crash. Also, overloading can shorten the life of your vehicle.

Your warranty does not cover parts or components that fail because of overloading. The label will help you decide how much cargo and installed equipment your truck can carry. Using heavier suspension components to get added durability might not change your weight ratings. Ask your dealer to help you load your vehicle the right way.

If you put things inside your vehicle – like suitcases, tools, packages, or anything else – they go as fast as the vehicle goes. If you have to stop or turn quickly, or if there is a crash, they’ll keep going.

{CAUTION:

Things you put inside your vehicle can strike and injure people in a sudden stop or turn, or in a crash.

(cid:127) Put things in the cargo area of your

vehicle. Try to spread the weight evenly.

(cid:127) Never stack heavier things, like suitcases,

inside the vehicle so that some of them are above the tops of the seats.

(cid:127) Do not leave an unsecured child restraint

in your vehicle.

(cid:127) When you carry something inside the vehicle, secure it whenever you can.

(cid:127) Do not leave a seat folded down unless

you need to.

Add-On Equipment When you carry removable items, you may need to put a limit on how many people you can carry inside your vehicle. Be sure to weigh your vehicle before you buy and install the new equipment. Notice: Overloading your vehicle may cause damage. Repairs would not be covered by your warranty. Do not overload your vehicle. Remember not to exceed the Gross Axle Weight Rating (GAWR) of the front or rear axle. The Cargo Weight Rating (CWR) is the maximum weight of the load your vehicle can carry. It doesn’t include the weight of the people inside. But you can figure about 150 lbs. (68 kg) for each seat. The total cargo load must not be more than your vehicle’s CWR.

There’s also important loading information for off-road driving in this manual. See “Loading Your Vehicle for Off-Road Driving” under Off-Road Driving on page 4-16.

4-63

Towing

Towing Your Vehicle Consult your dealer or a professional towing service if you need to have your disabled vehicle towed. See Roadside Assistance Program on page 7-6. If you want to tow your vehicle behind another vehicle for recreational purposes (such as behind a motorhome), see “Recreational Vehicle Towing” following.

Recreational Vehicle Towing Recreational vehicle towing means towing your vehicle behind another vehicle – such as behind a motorhome. The two most common types of recreational vehicle towing are known as “dinghy towing” (towing your vehicle with all four wheels on the ground) and “dolly towing” (towing your vehicle with two wheels on the ground and two wheels up on a device known as a “dolly”). With the proper preparation and equipment, many vehicles can be towed in these ways. See “Dinghy Towing” and “Dolly Towing,” following. Here are some important things to consider before you do recreational vehicle towing: (cid:127) What’s the towing capacity of the towing vehicle? Be sure you read the tow vehicle manufacturer’s recommendations.

4-64

(cid:127) How far will you tow? Some vehicles have

restrictions on how far and how long they can tow.

(cid:127) Do you have the proper towing equipment? See your dealer or trailering professional for additional advice and equipment recommendations. Is your vehicle ready to be towed? Just as you would prepare your vehicle for a long trip, you’ll want to make sure your vehicle is prepared to be towed. See Before Leaving on a Long Trip on page 4-45.

Dinghy Towing Use the following procedure to tow your vehicle: 1. Shift the transmission to PARK (P). 2. Turn the engine off, but leave the ignition on. 3. Firmly set the parking brake. 4. Securely attach the vehicle being towed to the

tow vehicle.

5. Shift the transfer case to NEUTRAL (N). See All-Wheel Drive on page 2-32 for the proper procedure to select the NEUTRAL position for your vehicle.

(cid:127) 6. Release the parking brake only after the vehicle

being towed is firmly attached to the towing vehicle. You can use your vehicle’s front mounted receiver with the proper accessories to tow it. See “Front Mounted Receiver” under If You Are Stuck: In Sand, Mud, Ice or Snow on page 4-52.

7. Turn the engine off and leave the steering

column unlocked.

{CAUTION:

Shifting an all-wheel-drive vehicle’s transfer case into NEUTRAL can cause your vehicle to roll even if the transmission is in Park (P). You or others could be injured. Make sure the parking brake is firmly set before you shift the transfer case to NEUTRAL.

Dolly Towing Your vehicle can not be dolly towed. If you must tow your vehicle behind another, use the dinghy towing procedure listed previously. Notice: Dolly towing your vehicle will damage drivetrain components. Do not dolly tow your vehicle.

Selectable Extended Rear Ride Height If your vehicle has this feature it comes as part of the electronically controlled air suspension system. The selectable rear ride height allows you to raise the rear of the vehicle about 2 inches (5 cm) over the normal ride height. This can be helpful when driving off-road where you may need more ground clearance to clear an obstacle.

The button that controls this feature is located on the instrument panel to the right of the steering wheel.

4-65

To use this feature, ensure that the following conditions are met:

The engine must be running.

(cid:127) All doors must be fully closed. The suspension will

not raise or lower if a door is open. The vehicle speed must be less than 40 mph (64 km/h). The system will not activate otherwise.

Press the height control button to raise the rear of the vehicle. A light in the button will begin to flash as the rear of the vehicle rises. Once the extended height has been reached (this may take up to a minute), the warning light will stop flashing and will stay lit while the vehicle is at the extended height. To lower the vehicle to the normal ride height, press the button again. The light in the button will flash as the suspension lowers. When the light in the button stops flashing and goes out, the suspension has reached the normal ride height. This feature will lower the vehicle to the normal height if vehicle speed exceeds 40 mph (64 km/h).

You may also want to use this feature when ascending, descending or cresting a steep hill as this can help prevent the rear bumper from dragging on the base of the hill or prevent the vehicle from grounding out (high centering) on the crest of the hill. Do not use this feature when towing a trailer. Electronically Controlled Air Suspension System The electronically controlled air suspension, if equipped, keeps the rear of your vehicle level as you load and unload it. The system includes a compressor, two height sensor and two air springs supporting the vehicle. The engine must be running for the system to level the vehicle after loading or unloading. The system will suspend leveling if any of the doors are open. Once the doors are closed, system leveling will continue. You may hear the compressor running when you load your vehicle, and periodically as the system adjusts the vehicle to the standard ride height. You may also hear the release of air similar to a hissing sound during suspension operation. This is normal. Load leveling will not function normally with the inflator hose attached to the inflator outlet. Remove the inflater hose from the outlet when it is not in use. See Accessory Inflator on page 5-67.

4-66

(cid:127) (cid:127) Overload and Overheat Protection Overload protection is designed to protect the air suspension system and is an indication to the driver that the vehicle is overloaded. If the rear suspension remains at a low height, the rear axle load has exceeded GAWR (Gross Axle Weight Rating). When the overload protection mode is activated, the compressor operates for about 30 seconds to one minute without raising the vehicle depending on the amount of overload. This will continue each time the ignition is turned on until the rear axle load is reduced below GAWR. If the total rear GAWR (Gross Axle Weight Rating) is reached, the suspension may be slightly less than level. This is normal and does not mean there is a problem with the air suspension. If the system overheats, it will shut down and stop all leveling functions until the system cools down. During this time the SERVICE AIR SUSPENSION message will appear in the DIC. See Driver Information Center (DIC) on page 3-43 for more information.

Trailer Recommendations You must subtract your hitch loads from the Cargo Weight Rating (CWR). CWR is the maximum weight of the load your vehicle can carry. It doesn’t include the weight of the people inside. But you can figure about 150 lbs. (68 kg) for each seat. The total cargo load must not be more than your vehicle’s CWR. Weigh your vehicle with the trailer attached, so that you won’t go over the GVWR or GAWR. If you are using a weight-distributing hitch, weigh the vehicle without the spring bars in place. You’ll get the best performance if you spread out the weight of your load the right way, and if you choose the correct hitch and trailer brakes. For more information, see Towing a Trailer on page 4-68.

4-67

To identify the trailering capacity of your vehicle, you should read the information in “Weight of the Trailer” that appears later in this section. If yours was built with trailering options, as many are, it’s ready for heavier trailers. But trailering is different than just driving your vehicle by itself. Trailering means changes in handling, acceleration, braking, durability and fuel economy. Successful, safe trailering takes correct equipment, and it has to be used properly. That’s the reason for this part. In it are many time-tested, important trailering tips and safety rules. Many of these are important for your safety and that of your passengers. So please read this section carefully before you pull a trailer.

Towing a Trailer

{CAUTION:

If you do not use the correct equipment and drive properly, you can lose control when you pull a trailer. For example, if the trailer is too heavy, the brakes may not work well — or even at all. You and your passengers could be seriously injured. Pull a trailer only if you have followed all the steps in this section. Ask your dealer for advice and information about towing a trailer with your vehicle.

Notice: Pulling a trailer improperly can damage your vehicle and result in costly repairs not covered by your warranty. To pull a trailer correctly, follow the advice in this part, and see your dealer for important information about towing a trailer with your vehicle.

4-68

If You Do Decide To Pull A Trailer If you do, here are some important points:

There are many different laws, including speed limit restrictions, having to do with trailering. Make sure your rig will be legal, not only where you live but also where you’ll be driving. A good source for this information can be state or provincial police.

(cid:127) Consider using a sway control. See “Hitches” later

in this section.

(cid:127) Don’t tow a trailer at all during the first 500 miles (800 km) your new vehicle is driven. Your engine, axle or other parts could be damaged. Then, during the first 500 miles (800 km) that you tow a trailer, don’t drive over 50 mph (80 km/h) and don’t make starts at full throttle. This helps your engine and other parts of your vehicle wear in at the heavier loads.

(cid:127) You can tow in DRIVE (D). You may want to shift the transmission to THIRD (3) or, if necessary, a lower gear selection if the transmission shifts too often (e.g., under heavy loads and/or hilly conditions). See “Tow/Haul Mode” following.

Three important considerations have to do with weight:

the weight of the trailer the weight of the trailer tongue and the weight on your vehicle’s tires

Tow/Haul Mode Tow/haul mode is used when using your vehicle to pull a large or heavy load or trailer. Tow/haul is also useful while pulling a load in rolling terrain, in stop-and-go traffic, or when you need improved low-speed control, such as when parking. The purpose of the tow/haul mode is to do the following: (cid:127) Reduce the frequency and improve the predictability of transmission shifts when pulling a heavy trailer or a large or heavy load.

(cid:127) Provide the same solid shift feel when pulling a heavy trailer or a large or heavy load as when the vehicle is unloaded. Improve control of vehicle speed while requiring less accelerator pedal activity when pulling a heavy trailer or a large or heavy load.

Tow/haul mode is most effective when the vehicle and trailer combined weight is at least 75% of the vehicle’s Gross Combination Weight Rating (GCWR). See “Weight of the Trailer” later in this section.

4-69

(cid:127) (cid:127) (cid:127) (cid:127) (cid:127) (cid:127) Press the button on the instrument panel to the right of the steering wheel to enable the tow/haul mode.

A light on the instrument panel will illuminate to indicate that tow/haul mode has been selected.

Press the button again to turn off tow/haul mode. The indicator light on the instrument panel will turn off. The vehicle will automatically turn off tow/haul mode every time it is started. Driving with tow/haul mode activated without a heavy load or with no trailer will cause reduced fuel economy and unpleasant engine and transmission driving characteristics, but will not cause damage. Weight of the Trailer How heavy can a trailer safely be? It depends on how you plan to use your rig. For example, speed, altitude, road grades, outside temperature and how much your vehicle is used to pull a trailer are all important. And, it can also depend on any special equipment that you have on your vehicle.

4-70

Use the following chart to determine how much your vehicle can weigh, based upon your vehicle model and options.

Maximum trailer weight is calculated assuming only the driver is in the tow vehicle and it has all the required trailering equipment. The weight of additional optional equipment, passengers and cargo in the tow vehicle must be subtracted from the maximum trailer weight.

Engine

Axle Ratio

Maximum Trailer Weight

**GCWR

6000 V8
**The Gross Combination Weight Rating (GCWR) in the total allowable weight of the completely loaded vehicle and trailer including any passengers, cargo, equipment and conversions. The GCWR for your vehicle should not be exceeded.

6,700 lbs (3 039 kg)

13,500 lbs (6 123 kg)

4.10

You can ask your dealer for our trailering information or advice, or you can write us at the address listed in your Warranty and Owner Assistance Information Booklet.

In Canada, write to:

General Motors of Canada Limited Customer Communication Centre, 163-005
1908 Colonel Sam Drive Oshawa, Ontario L1H 8P7

4-71

Weight of the Trailer Tongue The tongue load (A) of any trailer is an important weight to measure because it affects the total gross weight of your vehicle. The Gross Vehicle Weight (GVW) includes the curb weight of the vehicle, any cargo you may carry in it, and the people who will be riding in the vehicle. If you have a lot of options, equipment, passengers or cargo in your vehicle, it will reduce the tongue weight your vehicle can carry, which will also reduce the trailer weight your vehicle can tow. If you will tow a trailer, you must add the tongue load to the GVW because your vehicle will be carrying that weight, too. See Loading Your Vehicle on page 4-58
for more information about your vehicle’s maximum load capacity.

4-72

The trailer tongue weight (A) should be 10 percent to 15 percent of the total loaded trailer weight (B), up to a maximum of 500 lbs (227 kg) with a weight carrying hitch. The trailer tongue weight (A) should be 10 percent to 15 percent of the total loaded trailer weight (B), up to a maximum of 700 lbs (318 kg) with a weight distributing hitch. Do not exceed the maximum allowable tongue weight for your vehicle. Choose the shortest hitch extension that will position the hitch ball closest to the vehicle. This will help reduce the effect of trailer tongue weight on the rear axle. After you’ve loaded your trailer, weigh the trailer and then the tongue, separately, to see if the weights are proper. If they aren’t, you may be able to get them right simply by moving some items around in the trailer.

Weight-Distributing Hitches and Weight Carrying Hitches

Total Weight on Your Vehicle’s Tires Be sure your vehicle’s tires are inflated to the upper limit for cold tires. You’ll find these numbers on the Certification label at the rear edge of the driver’s door or see Loading Your Vehicle on page 4-58. Then be sure you don’t go over the GVW limit for your vehicle, or the GAWR, including the weight of the trailer tongue. If you use a weight distributing hitch, make sure you don’t go over the rear axle limit before you apply the weight distribution spring bars. Hitches It’s important to have the correct hitch equipment. Crosswinds, large trucks going by and rough roads are a few reasons why you’ll need the right hitch.

(A) Body-to-Ground Distance (B) Front of Vehicle

When using a weight-distributing hitch, the hitch must be adjusted so that the distance (A) remains the same both before and after coupling the trailer to the tow vehicle.

4-73

If you will be pulling a trailer that, when loaded, will weigh more than 5,000 lbs (2 268 kg) be sure to use a properly mounted weight-distributing hitch and sway control of the proper size. This equipment is very important for proper vehicle loading and good handling when driving. You should always use a sway control if your trailer will weigh more than these limits. You can ask a hitch dealer about sway controls. Safety Chains You should always attach chains between your vehicle and your trailer. Cross the safety chains under the tongue of the trailer to help prevent the tongue from contacting the road if it becomes separated from the hitch. Always leave just enough slack so you can turn with your rig. Never allow safety chains to drag on the ground.

Trailer Brakes If your trailer weighs more than 2,000 lbs (900 kg) loaded, then it needs its own brakes – and they must be adequate. Be sure to read and follow the instructions for the trailer brakes so you’ll be able to install, adjust and maintain them properly. Your trailer brake system can tap into the vehicle’s hydraulic brake system only if:

The trailer parts can withstand 3,000 psi (20 650 kPa) of pressure. The trailer’s brake system will use less than 0.02 cubic inch (0.3 cc) of fluid from your vehicle’s master cylinder. Otherwise, both braking systems won’t work well. You could even lose your brakes. If everything checks out this far, make the brake tap at the port on the master cylinder that sends the fluid to the rear brakes. But don’t use copper tubing for this. If you do, it will bend and finally break off. Use steel brake tubing.

4-74

(cid:127) (cid:127) Driving with a Trailer Towing a trailer requires a certain amount of experience. Before setting out for the open road, you’ll want to get to know your rig. Acquaint yourself with the feel of handling and braking with the added weight of the trailer. And always keep in mind that the vehicle you are driving is now a good deal longer and not nearly as responsive as your vehicle is by itself. Before you start, check all trailer hitch parts and attachments, safety chains, electrical connector, lamps, tires and mirror adjustment. If the trailer has electric brakes, start your vehicle and trailer moving and then apply the trailer brake controller by hand to be sure the brakes are working. This lets you check your electrical connection at the same time. During your trip, check occasionally to be sure that the load is secure, and that the lamps and any trailer brakes are still working. Following Distance Stay at least twice as far behind the vehicle ahead as you would when driving your vehicle without a trailer. This can help you avoid situations that require heavy braking and sudden turns.

Passing You’ll need more passing distance up ahead when you’re towing a trailer. Because you’re a good deal longer, you’ll need to go much farther beyond the passed vehicle before you can return to your lane. Backing Up Hold the bottom of the steering wheel with one hand. Then, to move the trailer to the left, just move that hand to the left. To move the trailer to the right, move your hand to the right. Always back up slowly and, if possible, have someone guide you. Making Turns Notice: Making very sharp turns while trailering could cause the trailer to come in contact with the vehicle. Your vehicle could be damaged. Avoid making very sharp turns while trailering. When you’re turning with a trailer, make wider turns than normal. Do this so your trailer won’t strike soft shoulders, curbs, road signs, trees or other objects. Avoid jerky or sudden maneuvers. Signal well in advance.

4-75

You may also want to activate the tow/haul mode if the transmission shifts too often. See “Tow/Haul Mode” earlier. When towing at high altitude on steep uphill grades, consider the following: Engine coolant will boil at a lower temperature than at normal altitudes. If you turn your engine off immediately after towing at high altitude on steep uphill grades, your vehicle may show signs similar to engine overheating. To avoid this, let the engine run while parked (preferably on level ground) with the automatic transmission in PARK (P) for a few minutes before turning the engine off. If you do get the overheat warning, see Engine Overheating on page 5-26.

Turn Signals When Towing a Trailer The arrows on your instrument panel will flash whenever you signal a turn or lane change. Properly hooked up, the trailer lamps will also flash, telling other drivers you’re about to turn, change lanes or stop. When towing a trailer, the arrows on your instrument panel will flash for turns even if the bulbs on the trailer are burned out. Thus, you may think drivers behind you are seeing your signal when they are not. It’s important to check occasionally to be sure the trailer bulbs are still working. Driving On Grades Reduce speed and shift to a lower gear before you start down a long or steep downgrade. If you don’t shift down, you might have to use your brakes so much that they would get hot and no longer work well. You can tow in DRIVE (D). You may want to shift the transmission to THIRD (3) or, if necessary, a lower gear selection if the transmission shifts too often (e.g., under heavy loads and/or hilly conditions).

4-76

Parking on Hills

{CAUTION:

You really should not park your vehicle, with a trailer attached, on a hill. If something goes wrong, your rig could start to move. People can be injured, and both your vehicle and the trailer can be damaged.

But if you ever have to park your rig on a hill, here’s how to do it: 1. Apply your regular brakes, but don’t shift into

PARK (P) yet.

2. Have someone place chocks under the

trailer wheels.

3. When the wheel chocks are in place, release the regular brakes until the chocks absorb the load.

4. Reapply the regular brakes. Then apply your

parking brake and shift into PARK (P).

5. Release the regular brakes.

When You Are Ready to Leave After Parking on a Hill 1. Apply your regular brakes and hold the pedal down

while you:

start your engine, shift into a gear, and release the parking brake.

2. Let up on the brake pedal. 3. Drive slowly until the trailer is clear of the chocks. 4. Stop and have someone pick up and store

the chocks.

Maintenance When Trailer Towing Your vehicle will need service more often when you’re pulling a trailer. See the Maintenance Schedule for more on this. Things that are especially important in trailer operation are automatic transmission fluid (don’t overfill), engine oil, axle lubricant, belts, cooling system and brake system. Each of these is covered in this manual, and the Index will help you find them quickly. If you’re trailering, it’s a good idea to review these sections before you start your trip. Check periodically to see that all hitch nuts and bolts are tight.

4-77

(cid:127) (cid:127) (cid:127) Trailer Wiring Harness Heavy-Duty Trailer Wiring Package

Your vehicle is equipped with a trailer towing harness. This harness with a seven-pin universal heavy-duty trailer connector is attached to a bracket on the hitch platform.

The trailer towing harness contains the following trailer circuits: (cid:127) Yellow: Left Stop/Turn Signal (cid:127) Dark Green: Right Stop/Turn Signal (cid:127) Brown: Taillamps (cid:127) White: Ground

Light Green: Back-up Lamps Light Blue: Center High-Mounted Stoplamp (CHMSL) (cid:127) Red: Battery Feed (cid:127) Dark Blue: Trailer Brake A jumper harness for an electric trailer brake controller and a trailer battery feed fuse may be included with this trailering package. See “Instrument Panel Jumper Wiring Harness” later in this section. If you need to tow a light-duty trailer with a standard four-way, round pin connector, an adapter may be included. See “Four-Wire Harness Adapter” later in this section.

4-78

(cid:127) (cid:127) If your vehicle has factory or

Instrument Panel Jumper Wiring Harness Notice: dealer-installed HUMMER off-road lamps, the place where an electric trailer brake connection must be made is already in use. Do not attempt to double-up or “piggyback” the connection, because this could cause a failure or damage to your vehicle, the electric trailer brake system, or both. If you want to connect a trailer with electric brakes to your vehicle, see your dealer to disconnect the off-road lamps. Also, read Add-On Electrical Equipment on page 5-102 for more information.

{CAUTION:

Be sure to use only the correct trailer brake harness, the one intended for use on your vehicle. If you use some other trailer brake harness, even if it seems to fit, your trailer brakes may not work at all. You could have a