2006 GMC Sierra Owners Manual

(cid:127) (cid:127) {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. 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.

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If Your Vehicle is 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 5-89.

Rocking Your Vehicle to Get It Out First, turn your steering wheel left and right. That will clear the area around your front wheels. If you have a four-wheel-drive vehicle, shift into Four-Wheel High. If your vehicle has the traction assist system, you should turn it off by pressing the TAS on/off button. Then shift back and forth between REVERSE (R) and a forward gear, or with a manual transmission, between FIRST (1) or SECOND (2) and REVERSE (R), 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 hooks if your vehicle has them. If you do need to be towed out, see Towing Your Vehicle on page 4-62.

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Your vehicle may have recovery hooks at the front of the 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.

Recovery Hooks

{CAUTION:

These hooks, when used, are under a lot of force. Always pull the vehicle straight out. Never pull on the hooks at a sideways angle. The hooks could break off and you or others could be injured from the chain or cable snapping back.

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

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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 was designed to carry, the Tire and Loading Information label and the Certification/Tire label.

{CAUTION:

Do not load your vehicle any heavier than the Gross Vehicle Weight Rating (GVWR), or either the maximum front or rear Gross Axle Weight Rating (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.

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Tire and Loading Information Label

Label Example

A vehicle specific 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 5-72
and Inflation - Tire Pressure on page 5-79.

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 axles. 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 lbs” 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 kg or XXX lbs.

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 4-67 for important information on towing a trailer, towing safety rules and trailering tips.

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)

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Example 2

Example 3

Item

Description

Total

Item

Description

Total

1,000 lbs (453 kg)

Vehicle Capacity Weight for Example 2 = Subtract Occupant Weight 150 lbs (68 kg) × 5 = Available Cargo Weight = 250 lbs (113 kg)

750 lbs (136 kg)

1,000 lbs (453 kg)

Vehicle Capacity Weight for Example 3 = Subtract Occupant Weight 200 lbs (91 kg) × 5 = Available Cargo Weight = 0 lbs (0 kg)

1000 lbs (453 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.

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Certification/Tire Label

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 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.

A vehicle specific Certification/Tire label is found on the rear edge of the driver’s door. The label shows the size of your vehicle’s original tires and the inflation pressures needed to obtain the gross weight capacity of your vehicle. This is called Gross Vehicle Weight Rating (GVWR). The GVWR includes the weight of the vehicle, all occupants, fuel, and cargo.

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The Certification/Tire label also contains important information about your Front Axle Reserve Capacity. See “What is front axle reserve capacity, and how do I calculate it?” under Adding a Snow Plow or Similar Equipment on page 4-54.

{CAUTION:

In the case of a sudden stop or collision, things carried in the bed of your truck could shift forward and come into the passenger area, injuring you and others. If you put things in the bed of your truck, you should make sure they are properly secured.

{CAUTION:

Do not load your vehicle any heavier than the Gross Vehicle Weight Rating (GVWR), or either the maximum front or rear Gross Axle Weight Rating (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.

Notice: Overloading your vehicle may cause damage. Repairs would not be covered by your warranty. Do not overload your vehicle. 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 will keep going.

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{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.

There is 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.

Two-Tiered Loading By positioning four 2 inches (5 cm) by 6 inches (15 cm) wooden planks across the width of the pickup box, you can create an upper load platform. The planks must be inserted in the pickup box depressions. The length of the planks must allow for at least a 3/4 inch (2 cm) bearing surface on each end of the plank. When using this upper load platform, be sure the load is securely tied down to prevent it from shifting. The load’s center of gravity should be positioned in a zone over the rear axle. The zone is located in the area between the front of each wheel well and the rear of each wheel well. The center of gravity height must not extend above the top of the pickup box flareboard. Any load that extends beyond the vehicle’s taillamp area must be properly marked according to local laws and regulations. Remember not to exceed the Gross Axle Weight Rating (GAWR) of the front or rear axle.

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Add-On Equipment When you carry removable items, you may need to put a limit on how many people you 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.

Maximum Weight *Equipment Ladder Rack and Cargo 750 lbs (340 kg) Cross Toolbox and Cargo 400 lbs (181 kg) Side Boxes and Cargo 250 lbs per side (113 kg per side)

*The combined weight for all rail-mounted equipment should not exceed 1,000 lbs (454 kg), excluded 1500 crew cab models with 5 ft 8 in (173 cm) box length. A reinforcement kit for rail-mounted add-on equipment is recommended. See your dealer. Ladder racks are not recommended for 1500 crew cab models with 5 ft 8 in (173 cm) pick-up box length. Maximum recommended cross-mounted toolbox and cargo weight is 300 lbs (136 kg) for the 1500 crew cab with 5 ft 8 in (173 cm) pick-up box length.

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Adding a Snow Plow or Similar Equipment Before installing a snow plow on your vehicle, here are some things you will need to know: Notice: If your vehicle does not have the snow plow prep package, adding a plow can damage your vehicle, and the repairs would not be covered by warranty. Unless your vehicle was built to carry a snow plow, do not add one to your vehicle. If your vehicle has the snow plow option called RPO VYU (snow plow prep package), then the payload your vehicle can carry will be reduced when a snow plow is installed. Your vehicle can be damaged if either the front or rear axle ratings or the gross vehicle weight (GVW) are exceeded.

Q: How do I know if my vehicle can handle a

snow plow?

A: Some vehicles are built with a special package,

called RPO VYU (snow plow prep package). If your vehicle has this option, you can add a plow to it, provided certain weights, such as the weights on the vehicle’s axles and the GVW, are not exceeded.

Q: How heavy can a snow plow safely be? A: The plow your vehicle can carry depends on many

things, such as: The options your vehicle came with, and the weight of those options. The weight and number of passengers you intend to carry. The weight of items you have added to your vehicle, like a tool box or truck cap. The total weight of any additional cargo you intend to carry.

Say, for example, you have a 700 lb (318 kg) snow plow. The total weight of all occupants and cargo inside the cab should not exceed 300 lb (135 kg). This means that you may only be able to carry one passenger. But, even this may be too much if you have got other equipment already adding to the weight of your vehicle.

Here are some guidelines for safely carrying a snow plow on your vehicle: (cid:127) Make sure the weight on the front and rear axles

does not exceed the axle rating for each. For the front axle, if more cargo or passengers must be carried, appropriate counter ballast must be installed rear of the rear axle. Counter ballast must be properly secured so it will not move during driving. Follow the snow plow manufacturer’s recommendations regarding rear ballast. Rear ballast may be required to ensure a proper front and rear weight distribution ratio, even though the actual weight at the front axle may be less than the front axle rating. The snow plow manufacturer or installer can assist you in determining the amount of rear ballast required, to help make sure your snowplow/vehicle combination does not exceed the GVW rating, the front and rear axle ratings, and the front and rear weight distribution ratio. The total vehicle must not exceed the GVW rating.

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(cid:127) (cid:127) (cid:127) (cid:127) (cid:127) (cid:127) (cid:127) (cid:127) In order to calculate the amount of weight any front accessory, such as a snow plow, is adding to the front axle, use the following formula:

Q: What is front axle reserve capacity, and how do

I calculate it?

A: Front axle reserve capacity is the difference

between your front gross axle weight rating (GAWR) and the front axle weight of your vehicle with full fuel and passengers. Basically, it is the amount of weight you can add to your front axle before reaching your front GAWR.

The front axle reserve capacity for your vehicle can be found in the lower right corner of the Certification/Tire label, as shown.

(W x (A + W.B.)) /W.B.= Weight the accessory is adding to the front axle. Where: W = Weight of added accessory A = Distance that the accessory is in front of the front axle W.B. = Vehicle Wheelbase

United States

Canada

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For example, adding a 700 lb (318 kg) snow plow actually adds more than 700 lbs (318 kg) to the front axle. Using the formula, if the snow plow is 4 ft (122 cm) in front of the front axle and the wheel base is 10 ft (305 cm), then: W = 700 lb (318 kg) A = 4 ft (122 cm) W.B. = 10 ft (305 cm) (W x (A + W.B.))/W.B. = (700 x (4 + 10))/10 = 980 lbs (445 kg) So, if your truck’s front axle reserve capacity is more than 980 lbs (445 kg), you could add the snow plow without exceeding the front GAWR.

Q: What if I want to add heavier equipment to my

vehicle?

A: You can add heavier equipment on the front of the vehicle if you compensate for it by carrying fewer passengers, less cargo, or by positioning cargo towards the rear. This has the effect of reducing the load on the front. However, the front GAWR, rear GAWR and the gross vehicle weight rating (GVWR) must never be exceeded.

{CAUTION:

On some vehicles equipped with certain front mounted equipment, such as a snow plow, it may be possible to load the front axle to the front GAWR but not have enough weight on the rear axle to have proper braking performance. If your brakes can not work properly, you could have a crash. To help your brakes work properly when a snow plow is installed, always follow the snow plow manufacturer or installer’s recommendation for rear ballast to ensure a proper front and rear weight distribution ratio, even though the actual front weight may be less than the front GAWR, and the total vehicle weight is less than the GVWR. Maintaining a proper front and rear weight distribution ratio is necessary to provide proper braking performance.

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Emergency Roof Lamp Provisions Vehicles with the RPO VYU snow plow prep package also have an emergency roof lamp provision package, RPO TRW. Wiring for the emergency roof lamp is provided in the B-pillar as shown. See Auxiliary Roof Mounted Lamp on page 3-18 for switch location.

Q: What is total vehicle reserve capacity? A: This is the difference between your GVWR and the weight of your truck with full fuel and passengers. It is the amount of weight you can add to your vehicle before reaching your GVWR. Keep in mind that reserve capacity numbers are intended as a guide when selecting the amount of equipment or cargo your truck can carry. If you are unsure of your vehicle’s front, rear, or total weight, go to a weigh station and weigh your vehicle. Your dealer can also help you with this. The total vehicle reserve capacity for your vehicle can be found in the lower right corner of the Certification/Tire label as shown previously.

See your dealer for additional advice and information about using a snow plow on your vehicle. Also, see Loading Your Vehicle on page 4-48.

A. Body Side Inner Panel B. Emergency Roof Lamp Harness

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Truck-Camper Loading Information A vehicle specific Truck-Camper Loading information label is attached to the inside of your vehicle’s glove box. This label will tell you if your vehicle can carry a slide-in camper, how much of a load your vehicle can carry, and how to correctly spread out the load. Also, it will help you match the right slide-in camper to your vehicle. When you carry a slide-in camper, the total cargo load of your vehicle is the weight of the camper, plus the following: (cid:127) Everything else added to the camper after it left the

factory

(cid:127) Everything in the camper (cid:127) All the people inside The Cargo Weight Rating (CWR) is the maximum weight of the load your vehicle can carry. It does not 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. Refer to the Truck-Camper Loading Information label in the glove box for dimensions A and B as shown in the following illustration.

Use the rear edge of the load floor for measurement purposes. The recommended location for the cargo center of gravity is at point C for the CWR. It is the point where the mass of a body is concentrated and, if suspended at that point, would balance the front and rear.

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Here is an example of proper truck and camper match:

A. Camper Center of Gravity B. Recommended Center of Gravity Location Zone When the truck is used to carry a slide-in camper, the total cargo load of the truck consists of the manufacturer’s camper weight figure, the weight of installed additional camper equipment not included in the manufacturer’s camper weight figure, the weight of camper cargo, and the weight of passengers in the camper. The total cargo load should not exceed the truck’s cargo weight rating and the camper’s center of gravity (A) should fall within the truck’s recommended center of gravity zone (B) when installed.

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You must weigh any accessories or other equipment that you add to your vehicle. Then, subtract this extra weight from the CWR. This extra weight may shorten the center of gravity zone of your vehicle. Your dealer can help you with this. If your slide-in camper and its load weighs less than the CWR, the center of gravity zone for your vehicle may be larger. Your dealer can help you make a good vehicle-camper match and help you determine the CWR. After you have loaded your vehicle and camper, drive to a weigh station and weigh the front and rear wheels separately. This will tell you the loads on the axles. The loads on the front and rear axles should not be more than either of the Gross Axle Weight Ratings (GAWR). The total of the axle loads should not be more than the Gross Vehicle Weight Rating (GVWR). Open the driver’s door and look at the Certification/Tire label to find out your vehicle’s GAWRs and GVWR. If your vehicle has gone over the weight ratings, move or take out some things until all the weight falls below the ratings.

Secure loose items to prevent weight shifts that could affect the balance of your vehicle. When the truck-camper is loaded, drive to a scale and weigh the front and the rear wheels separately to determine axle loads. Individual axle loads should not exceed either of the GAWRs. The total of the front and rear axle loads should not exceed your vehicle’s GVWR. These ratings are given on the vehicle certification label attached to the rear edge of the driver’s door. See “Certification/Tire Label” under Loading Your Vehicle on page 4-48. If weight ratings are exceeded, move or remove items to bring all weights below the ratings. When you install and load your slide-in camper, check the manufacturer’s instructions. If you want more information on curb weights, cargo weights, Cargo Weight Rating and the correct center of gravity zone for your vehicle, your dealer can help you. Just ask for a copy of “Consumer Information, Truck-Camper Loading.”

Pickup Conversion to Chassis Cab General Motors is aware that some vehicle owners may consider having the pickup box removed and a commercial or recreational body installed. Before you do so, first contact GM Customer Assistance for information on such conversions specific to this vehicle. Owners should be aware that, as manufactured, there are differences between a chassis cab and a pickup with the box removed which may affect vehicle safety. The components necessary to adapt a pickup to permit its safe use with a specialized body should be installed by a body builder in accordance with the information available from GM Customer Assistance. See Customer Assistance Offices on page 7-4.

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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 will 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.

(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 4-38.

Dinghy Towing Two-Wheel-Drive Vehicles Notice: If you tow your vehicle with all four wheels on the ground, the drivetrain components could be damaged. The repairs would not be covered by your warranty. Do not tow your vehicle with all four wheels on the ground. Two-wheel-drive vehicles should not be towed with all four wheels on the ground. Two-wheel-drive transmissions have no provisions for internal lubrication while being towed.

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(cid:127) Four-Wheel-Drive Vehicles

Use the following procedure to tow your vehicle: 1. Shift an automatic transmission to PARK (P), or a

manual transmission to FIRST (1).

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.

{CAUTION:

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

5. Shift the transfer case to NEUTRAL. See

Four-Wheel Drive on page 2-38 for the proper procedure to select the neutral position for your vehicle.

6. Release the parking brake only after the vehicle

being towed is firmly attached to the towing vehicle. 7. Turn the ignition off and leave the steering column

unlocked.

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Dolly Towing Front Towing (Front Wheels Off the Ground) Two-Wheel-Drive Vehicles Notice: If you tow a two-wheel-drive vehicle with the rear wheels on the ground, the transmission could be damaged. The repairs would not be covered by your warranty. Never tow your vehicle with the rear wheels on the ground. Two-wheel-drive vehicles should not be towed with the rear wheels on the ground. Two-wheel-drive transmissions have no provisions for internal lubrication while being towed. To dolly tow a two-wheel-drive vehicle, you must tow the vehicle with the rear wheels on the dolly. See “Rear Towing (Rear Wheels Off the Ground)” later in this section for more information.

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Four-Wheel-Drive Vehicles

Use the following procedure to tow your vehicle: 1. Drive the vehicle up onto the tow dolly. 2. Shift an automatic transmission to PARK (P), or a

manual transmission to FIRST (1).

3. Turn the engine off, but leave the ignition on. 4. Firmly set the parking brake. 5. Securely attach the vehicle being towed to the

tow dolly.

{CAUTION:

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

6. Shift the transfer case to NEUTRAL. See

Four-Wheel Drive on page 2-38 for the proper procedure to select the neutral position for your vehicle.

7. Release the parking brake only after the vehicle

being towed is firmly attached to the towing vehicle. 8. Turn the ignition off and lock the steering column.

Rear Towing (Rear Wheels Off the Ground) Two-Wheel-Drive Vehicles Use the following procedure to tow your vehicle from the rear: 1. Drive the vehicle onto the dolly. 2. Firmly set the parking brake. See Parking Brake on

page 2-52

3. Put an automatic transmission in PARK (P) or a

manual transmission in FIRST (1).

4. Follow the dolly manufacturer’s instructions to attach and secure the vehicle being towed to the dolly and then the loaded dolly to the tow vehicle. Make sure the wheels are straight before towing. For manual transmission vehicles, make sure the wheels are straight before proceeding to the next steps. On automatic transmission vehicles, use an adequate clamping device to ensure that the front wheels are locked into the straight position.

5. Release the parking brake only after the vehicle being towed is firmly attached to the tow vehicle.

6. Turn the ignition to LOCK.

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Four-Wheel-Drive Vehicles Use the following procedure to tow your vehicle from the rear: 1. Drive the vehicle onto the dolly. 2. Firmly set the parking brake. See Parking Brake on

page 2-52

3. Put an automatic transmission in PARK (P) or a

manual transmission in FIRST (1).

4. Follow the dolly manufacturer’s instructions to attach and secure the vehicle being towed to the dolly and then the loaded dolly to the tow vehicle. For manual transmission vehicles, make sure the wheels are straight before proceeding to the next steps. On automatic transmission vehicles, use an adequate clamping device to ensure that the front wheels are locked into the straight position.

{CAUTION:

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

5. Shift the transfer case to NEUTRAL. See Four-Wheel Drive on page 2-38

6. Release the parking brake only after the vehicle being towed is firmly attached to the tow vehicle.

7. Turn the ignition to LOCK.

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Towing a Trailer Do not tow a trailer during break-in. See New Vehicle Break-In on page 2-21

{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. To identify the trailering capacity of your vehicle, you should read the information in “Weight of the Trailer” that appears later in this section. Trailering is different than just driving your vehicle by itself. Trailering means changes in acceleration, braking, handling, 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.

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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. If you have an automatic transmission, 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, such as under heavy loads and/or hilly conditions. If you have a manual transmission and you are towing a trailer, it’s better not to use the highest gear. See Tow/Haul Mode Light on page 3-50.

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Three important considerations have to do with weight:

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

Tow/Haul Mode Tow/Haul is a feature on automatic transmission equipped vehicles that assists when pulling a heavy trailer or a large or heavy load. See Tow/Haul Mode on page 2-31 for more information. Tow/Haul is designed to be most effective when the vehicle and trailer combined weight is at least 75 percent of the vehicle’s Gross Combined Weight Rating (GCWR). See “Weight of the Trailer” later in the section. Tow/Haul is most useful under the following driving conditions: (cid:127) When pulling a heavy trailer or a large or heavy load

through rolling terrain.

(cid:127) When pulling a heavy trailer or a large or heavy load

in stop and go traffic.

(cid:127) When pulling a heavy trailer or a large or heavy load

in busy parking lots where improved low speed control of the vehicle is desired.

(cid:127) (cid:127) (cid:127) (cid:127) (cid:127) (cid:127) Operating the vehicle in Tow/Haul when lightly loaded or with no trailer at all will not cause damage. However, there is no benefit to the selection of Tow/Haul when the vehicle is unloaded. Such a selection when unloaded may result in unpleasant engine and transmission driving characteristics and reduced fuel economy. Tow/Haul is recommended only when pulling a heavy trailer or a large or heavy load. 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. It can also depend on any special equipment that you have on your vehicle, and the amount of tongue weight the vehicle can carry. See “Weight of the Trailer Tongue” later in this section for more information.

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. Above the 5,000 lb (2 268 kg) trailer rating, the handling/trailering suspension is required on C-1500 models and the handling/trailering or off-road suspension is required on K-1500 models. Use one of the following charts to determine how much your vehicle can weigh, based upon your vehicle model and options.

4-69

Vehicle* C-1500 Regular Cab Short Box (2WD)* 4300 V6 (Auto) 4300 V6 (Manual)

Axle Ratio Maximum Trailer Weight

3.23
3.23
3.23
3.73
3.23
3.73
3.23
3.73

5,000 lbs (2 268 kg) 4,000 lbs (1 814 kg) 6,400 lbs (2 903 kg) 7,400 lbs (3 357 kg) 4,400 lbs (1 996 kg) 5,400 lbs (2 449 kg) 7,400 lbs (3 357 kg) 8,400 lbs (3 810 kg)

4800 V8 (Auto)

4800 V8 (Manual)

5300 V8

GCWR

9,500 lbs (4 309 kg) 8,500 lbs (3 855 kg) 11,000 lbs (4 994 kg) 12,000 lbs (5 443 kg) 9,000 lbs (4 082 kg) 10,000 lbs (4 535 kg) 12,000 lbs (5 443 kg) 13,000 lbs (5 897 kg)

* Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 1,500 lbs (680 kg) maximum.

Vehicle* C-1500 Extended Cab Short Box (2WD)*

Axle Ratio Maximum Trailer Weight

GCWR

4300 V6 (Auto)

4300 V6 (Manual)

4800 V8 (Auto)

4800 V8 (Manual)

5300 V8

3.23
3.73
3.23
3.23
3.73
3.23
3.73
3.23
3.73

4,600 lbs (2 087 kg) 5,100 lbs (2 313 kg) 3,600 lbs (1 633 kg) 5,900 lbs (2 676 kg) 6,900 lbs (3 130 kg) 3,900 lbs (1 769 kg) 4,900 lbs (2 222 kg) 6,900 lbs (3 130 kg) 7,900 lbs (3 583 kg)**

9,500 lbs (4 309 kg) 10,000 lbs (4 536 kg) 8,500 lbs (3 859 kg) 11,000 lbs (4 990 kg) 12,000 lbs (5 443 kg) 9,000 lbs (4 086 kg) 10,000 lbs (4 540 kg) 12,000 lbs (5 443 kg) 13,000 lbs (5 897 kg)

* Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 1,500 lbs (680 kg) maximum. **Maximum 8,000 lbs (3 628 kg) for fifth-wheel or gooseneck.

4-70

Vehicle* C-1500 HD (2WD)*

Axle Ratio Maximum Trailer Weight

GCWR

6000 V8

14,000 lbs (6 350 kg) 16,000 lbs (7 257 kg) * Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 2,500 lbs (1 133 kg) maximum.

8,300 lbs (3 765 kg) 10,300 lbs (4 672 kg)

3.73
4.10

Axle Ratio Maximum Trailer Weight

GCWR

Vehicle* C-1500 Crew Cab (2WD)*

5300 V8

6000 V8
Fifth-wheel or gooseneck trailering is neither designed nor intended for this vehicle

6,700 lbs (3 039 kg) 7,700 lbs (3 493 kg) 10,100 lbs (4 581 kg)

Axle Ratio Maximum Trailer Weight

GCWR

Vehicle* C-1500 Regular Cab Long Box (2WD)* 4300 V6 (Auto) 4300 V6 (Manual)

4800 V8 (Auto)

4800 V8 (Manual)

5300 V8

4,800 lbs (2 177 kg) 3,800 lbs (1 724 kg) 6,200 lbs (2 812 kg) 7,200 lbs (3 266 kg) 4,200 lbs (1 905 kg) 5,200 lbs (2 359 kg) 7,200 lbs (3 266 kg) 8,200 lbs (3 719 kg)

3.23
3.73
3.73

3.23
3.23
3.23
3.73
3.23
3.73
3.23
3.73

12,000 lbs (5 443 kg) 13,000 lbs (5 897 kg) 15,500 lbs (7 031 kg)

9,500 lbs (4 313 kg) 8,500 lbs (3 859 kg) 11,000 lbs (4 994 kg) 12,000 lbs (5 448 kg) 9,000 lbs (4 086 kg) 10,000 lbs (4 540 kg) 12,000 lbs (5 448 kg) 13,000 lbs (5 902 kg)

* Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 1,500 lbs (680 kg) maximum.

4-71

Vehicle* C-1500 Extended Cab Long Box (2WD)*

Axle Ratio Maximum Trailer Weight

GCWR

4800 V8 (Auto)

4800 V8 (Manual)

5300 V8

3.23
3.73
3.23
3.73
3.42
3.73

5,800 lbs (2 631 kg) 6,800 lbs (3 084 kg) 3,800 lbs (1 724 kg) 4,800 lbs (2 177 kg) 6,800 lbs (3 084 kg) 7,800 lbs (3 538 kg)

11,000 lbs (4 994 kg) 12,000 lbs (5 448 kg) 9,000 lbs (4 086 kg) 10,000 lbs (4 540 kg) 12,000 lbs (5 448 kg) 13,000 lbs (5 902 kg)

* Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 1,500 lbs (680 kg) maximum.

Vehicle* K-1500 Regular Cab Short Box (4WD) 4300 V6 (Auto) 4300 V6 (Manual)

Axle Ratio Maximum Trailer Weight

3.73
3.73
3.42
3.73
4.10
3.42
3.73
4.10
3.42
3.73
4.10

5,100 lbs (2 313 kg) 4,100 lbs (1 860 kg) 7,100 lbs (3 221 kg) 7,100 lbs (3 221 kg) 8,100 lbs (3 674 kg) 5,100 lbs (2 313 kg) 5,100 lbs (2 313 kg) 6,100 lbs (2 767 kg) 8,100 lbs (3 674 kg) 8,000 lbs (3 674 kg) 9,100 lbs (4 128 kg)

4800 V8 (Auto)

4800 V8 (Manual)

5300 V8

GCWR

10,000 lbs (4 540 kg) 9,000 lbs (4 086 kg) 12,000 lbs (5 448 kg) 12,000 lbs (5 448 kg) 13,000 lbs (5 902 kg) 10,000 lbs (4 540 kg) 10,000 lbs (4 540 kg) 11,000 lbs (4 994 kg) 13,000 lbs (5 902 kg) 13,000 lbs (5 902 kg) 14,000 lbs (6 356 kg)

* Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 1,500 lbs (680 kg) maximum.

4-72

Vehicle* K-1500 Extended Cab Short Box (4WD)*

Axle Ratio Maximum Trailer Weight

GCWR

4800 V8 (Auto)

4800 V8 (Manual)

6,700 lbs (3 039 kg) 6,700 lbs (3 039 kg) 7,700 lbs (3 493 kg)** 4,700 lbs (2 132 kg) 4,700 lbs (2 132 kg) 5,700 lbs (2 585 kg) 7,700 lbs (3 493 kg)** 7,700 lbs (3 493 kg)** 8,700 lbs (3 946 kg)** ** Maximum weight 7,700 lbs. (3 492 kg) for fifth-wheel or gooseneck. K-1500 HD (4WD)*

3.42
3.73
4.10
3.42
3.73
4.10
3.42
3.73
4.10

5300 V8

12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 13,000 lbs (5 897 kg) 10,000 lbs (4 535 kg) 10,000 lbs (4 535 kg) 11,000 lbs (4 990 kg) 13,000 lbs (5 897 kg) 13,000 lbs (5 897 kg) 14,000 lbs (6 350 kg)

6000 V8

3.73
4.10

7,900 lbs (3 583 kg) 9,900 lbs (4 491 kg)

14,000 lbs (6 350 kg) 16,000 lbs (7 257 kg)

Axle Ratio Maximum Trailer Weight

GCWR

Vehicle* K-1500 Crew Cab (4WD)*

5300 V8

3.42
3.73
4.10
4.10

7,400 lbs (3 357 kg) 7,400 lbs (3 357 kg) 8,400 lbs (3 810 kg) 9,800 lbs (4 445 kg)

13,000 lbs (5 897 kg) 13,000 lbs (5 897 kg) 14,000 lbs (6 350 kg) 15,500 lbs (7 031 kg)

6000 V8** *Fifth-wheel or gooseneck trailering is neither designed nor intended for this vehicle. **Trailer tongue weight should be 10 to 15 percent of total loaded trailer weight up to 1,200 lbs (544 kg) on models with NHT Enhanced Trailering Performance.

4-73

Vehicle* K-1500 Regular Cab Long Box (4WD)* 4300 V6 (Auto) 4300 V6 (Manual)

Axle Ratio Maximum Trailer Weight

3.73
3.73
3.42
3.73
4.10
3.42
3.73
4.10
3.42
3.73
4.10

5,000 lbs (2 268 kg) 4,000 lbs (1 814 kg) 6,900 lbs (3 130 kg) 6,900 lbs (3 130 kg) 7,900 lbs (3 583 kg) 4,900 lbs (2 223 kg) 4,900 lbs (2 223 kg) 5,900 lbs (2 676 kg) 7,900 lbs (3 583 kg) 7,900 lbs (3 583 kg) 8,900 lbs (4 037 kg)**

4800 V8 (Auto)

4800 V8 (Manual)

5300 V8

GCWR

10,000 lbs (4 536 kg) 9,000 lbs (4 082 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 13,000 lbs (5 897 kg) 10,000 lbs (4 536 kg) 10,000 lbs (4 536 kg) 11,000 lbs (4 990 kg) 13,000 lbs (5 897 kg) 13,000 lbs (5 897 kg) 14,000 lbs (6 350 kg)

*Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up to 1,500 lbs (680 kg) maximum. **Maximum weight 8,900 lbs (4 036 kg) for fifth-wheel and gooseneck.

4-74

Vehicle* K-1500 Extended Cab Long Box (4WD)*

Axle Ratio Maximum Trailer Weight

GCWR

4800 V8

4800 V8 (Manual)

5300 V8

3.42
3.73
4.10
3.42
3.73
4.10
3.42
3.73
4.10

6,500 lbs (2 948 kg) 6,500 lbs (2 948 kg) 7,500 lbs (3 402 kg) 4,500 lbs (2 041 kg) 4,500 lbs (2 041 kg) 5,500 lbs (2 495 kg) 7,500 lbs (3 402 kg)** 7,500 lbs (3 402 kg)** 8,500 lbs (3 856 kg)**

12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 13,000 lbs (5 897 kg) 10,000 lbs (4 536 kg) 10,000 lbs (4 536 kg) 11,000 lbs (4 990 kg) 13,000 lbs (5 897 kg) 13,000 lbs (5 897 kg) 14,000 lbs (6 350 kg)

*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 1,500 lbs (680 kg) maximum. **Maximum weight 6,800 lbs (3 084 kg) for fifth-wheel and gooseneck.

Vehicle* C-2500 Regular Cab Long Box HD (2WD)* 6000 V8

Axle Ratio Maximum Trailer Weight

GCWR

8100 V8

6.6L V8 Diesel

4.10
3.73
4.10
3.73

10,500 lbs (4 763 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 22,000 lbs (9 979 kg)

4-75

Axle Ratio Maximum Trailer Weight

GCWR

Vehicle* C-2500 Extended Cab Short Box HD (2WD)* 6000 V8

8100 V8

6.6L V8 Diesel *Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs (1 361 kg) maximum. Fifth-wheel or gooseneck GCWR for 6.6L V8 Diesel 2500 HD series models is 23,200 lbs (10 523 kg).

10,200 lbs (4 627 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 22,000 lbs (9 979 kg)

Vehicle* C-2500 Extended Cab Long Box HD (2WD)* 6000 V8

Axle Ratio Maximum Trailer Weight

GCWR

8100 V8

8100 V8

6.6L V8 Diesel C-2500 Crew Cab Short Box HD (2WD) 6000 V8

10,100 lbs (4 581 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 22,000 lbs (9 979 kg)

10,100 lbs (4 581 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 22,000 lbs (9 979 kg)

4.10
3.73
4.10
3.73

4.10
3.73
4.10
3.73

4.10
3.73
4.10
3.73

6.6L V8 Diesel *Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs (1 361 kg) maximum.

4-76

Axle Ratio Maximum Trailer Weight

GCWR

Vehicle* C-2500 Crew Cab Long Box HD (2WD) 6000 V8

8100 V8

4.10
3.73
4.10
3.73

10,000 lbs (4 536 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 22,000 lbs (9 979 kg)

6.6L V8 Diesel *Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs (1 361 kg) maximum.

Vehicle* K-1500 HD (4WD)*

6000 V8

Axle Ratio Maximum Trailer Weight

GCWR

3.73
4.10

7,900 lbs (3 583 kg) 9,900 lbs (4 491 kg)

14,000 lbs (6 350 kg) 16,000 lbs (7 257 kg)

*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs (1 361 kg) maximum.

Axle Ratio Maximum Trailer Weight

GCWR

Vehicle* K-2500 Regular Cab Long Box HD (4WD)* 6000 V8

8100 V8

4.10
3.73
4.10
3.73

10,300 lbs (4 672 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

6.6L V8 Diesel *Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs (1 361 kg) maximum. Fifth-wheel or gooseneck GCWR for 6.6L V8 Diesel 2500 HD series models is 23,200 lbs (10 523 kg).

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 22,000 lbs (9 979 kg)

4-77

Axle Ratio Maximum Trailer Weight

GCWR

Vehicle* K-2500 Extended Cab Short Box HD (4WD)* 6000 V8

8100 V8

6.6L V8 Diesel *Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs (1 361 kg) maximum. Fifth-wheel or gooseneck GCWR for 6.6L V8 Diesel 2500 HD series models is 23,200 lbs (10 523 kg).

10,000 lbs (4 536 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 22,000 lbs (9 979 kg)

Vehicle* K-2500 Extended Cab Long Box HD (4WD)* 6000 V8

Axle Ratio Maximum Trailer Weight

GCWR

8100 V8

8100 V8

6.6L V8 Diesel K-2500 Crew Cab Short Box HD (4WD)* 6000 V8

9,900 lbs (4 490 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 22,000 lbs (9 979 kg)

9,800 lbs (4 445 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 22,000 lbs (9 979 kg)

4.10
3.73
4.10
3.73

4.10
3.73
4.10
3.73

4.10
3.73
4.10
3.73

6.6L V8 Diesel *Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs (1 361 kg) maximum.

4-78

Vehicle* K-2500 Crew Cab Long Box HD (4WD) 6000 V8

Axle Ratio Maximum Trailer Weight

GCWR

8100 V8

16,000 lbs (7 257 kg) 20,000 lbs (9 072 kg) 22,000 lbs (9 979 kg) 6.6L V8 Diesel 22,000 lbs (9 979 kg) * Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs (1 361 kg) maximum.

9,700 lbs (4 400 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg) 12,000 lbs (5 443 kg)

4.10
3.73
4.10
3.73

GCWR

4.10
4.10
3.73
3.73

9,700 lbs (4 400 kg)

Axle Ratio Maximum Trailer Weight

Vehicle* C-3500 Extended Cab (2WD) 6000 V8
8100 V8
6.6L V8 Diesel (Manual) 6.6L V8 Diesel (Auto) C-3500 Crew Cab (2WD)* 6000 V8
8100 V8
6.6L V8 Diesel (Manual) 6.6L V8 Diesel (Auto) *Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs (1 587 kg) maximum. ** Limited to 12,000 lbs (5 443 kg) with weight distributing hitch.

12,000 lbs (5 543 kg)** 12,000 lbs (5 543 kg)** 12,000 lbs (5 443 kg)

12,000 lbs (5 443 kg)** 12,000 lbs (5 443 kg)** 12,000 lbs (5 443 kg)

9,500 lbs (4 309 kg)

4.10
4.10
3.73
3.73

16,000 lbs (7 257 kg) 22,000 lbs (9 979 kg) 23,500 lbs (10 659 kg) 23,500 lbs (10 659 kg)

16,000 lbs (7 257 kg) 22,000 lbs (9 979 kg) 23,500 lbs (10 659 kg) 23,500 lbs (10 659 kg)

4-79

Vehicle* K-3500 Regular Cab (4WD) 6000 V8 Dual Rear Wheel 6000 V8 Single Rear Wheel 8100 V8 Dual Rear Wheel 8100 V8 Single Rear Wheel 6.6L V8 Dual Rear Wheel (Auto) 6.6L V8 Dual Rear Wheel (Manual) 6.6L V8 Single Rear Wheel

Axle Ratio Maximum Trailer Weight

GCWR

4.10

4.10

4.10

4.10

3.73

3.73

3.73

9,800 lbs (4 445 kg)

16,000 lbs (7 257 kg)

10,000 lbs (4 536 kg)

16,000 lbs (7 257 kg)

15,400 lbs (6 985 kg)

22,000 lbs (9 979 kg)

15,600 lbs (7 067 kg)

22,000 lbs (9 979 kg)

16,700 lbs (7 575 kg)

23,500 lbs (10 659 kg)

16,700 lbs (7 575 kg)

23,500 lbs (10 659 kg)

15,400 lbs (6 985 kg)

22,000 lbs (9 979 kg)

4-80

4.10

4.10

4.10

GCWR

9,600 lbs (4 354 kg)

9,400 lbs (4 264 kg)

Axle Ratio Maximum Trailer Weight

Vehicle* K-3500 Extended Cab (4WD)* 6000 V8 Dual Rear Wheel 6000 V8 Single Rear Wheel 8100 V8 Dual Rear Wheel 8100 V8 Single Rear Wheel 6.6L V8 Diesel Dual Rear Wheel (Manual) 6.6L V8 Diesel Dual Rear Wheel (Auto) 6.6L V8 Diesel Single Rear Wheel * Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs (1 587 kg) maximum. Fifth-wheel or gooseneck GCWR for 6.6L V8 Diesel 3500 SRW series models is 23,200 lbs (10 523 kg).

16,300 lbs (7 394 kg)

15,000 lbs (6 804 kg)

15,000 lbs (6 804 kg)

16,300 lbs (7 394 kg)

15,000 lbs (6 804 kg)

4.10

3.73

3.73

3.73

16,000 lbs (7 257 kg)

16,000 lbs (7 257 kg)

22,000 lbs (9 979 kg)

22,000 lbs (9 979 kg)

22,000 lbs (9 979 kg)

23,500 lbs (10 659 kg)

23,500 lbs (10 659 kg)

4-81

16,000 lbs (7 264 kg)

16,000 lbs (7 264 kg)

4.10

4.10

4.10

GCWR

9,400 lbs (4 264 kg)

9,200 lbs (4 173 kg)

12,000 lbs (5 443 kg)

Axle Ratio Maximum Trailer Weight

Vehicle* K-3500 Crew Cab (4WD)* 6000 V8 Dual Rear Wheel 6000 V8 Single Rear Wheel 8100 V8 Dual Rear Wheel 8100 V8 Single Rear Wheel 6.6L V8 Diesel Single Rear Wheel (Auto) 6.6L V8 Diesel Single Rear Wheel (Manual) 6.6L V8 Diesel Dual Rear Wheel (Auto) 6.6L V8 Diesel Dual Rear Wheel (Manual) *Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs (1 587 kg) maximum. Fifth-wheel or gooseneck GCWR for 6.6L V8 Diesel 3500 SRW series models is 23,200 lbs (10 523 kg).

12,000 lbs (5 443 kg)

12,000 lbs (5 443 kg)

12,000 lbs (5 443 kg)

12,000 lbs (5 443 kg)

12,000 lbs (5 443kg)

4.10

3.73

3.73

3.73

3.73

22,000 lbs (9 979 kg)

22,000 lbs (9 979 kg)

22,000 lbs (9 979 kg)

22,000 lbs (9 979 kg)

23,500 lbs (10 659 kg)

23,500 lbs (10 659 kg)

4-82

The Gross Combination Weight Rating (GCWR) is 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. 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 Communications Centre, 163-005
1908 Colonel Sam Drive Oshawa, Ontario L1H 8P7

Weight of the Trailer Tongue The tongue load (A) of any trailer is an important weight to measure because it affects the total or 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. And 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 4-48 for more information about your vehicle’s maximum load capacity.

The trailer tongue weight (A) should be 10 percent to 15 percent of the total loaded trailer weight, up to a maximum of 600 lbs (272 kg) for the 1500 or 2500 series, and up to a maximum of 750 lbs (340 kg) for the 2500 HD or 3500 series with a weight carrying hitch. The trailer tongue weight (A) should be 10 percent to 15 percent of the total loaded trailer weight, up to a maximum of 1,000 lbs (453 kg) for the 1500 series and up to a maximum of 1,500 lbs (680 kg) for the 2500, 2500 HD or 3500 series with a weight distributing hitch. Fifth wheel or gooseneck kingpin weight should be 15 to 25 percent of the trailer weight up to the maximum amount specified in the trailering chart for your vehicle. See “Weight of the Trailer”, and “Fifth-Wheel and Gooseneck Trailering” in this section.

4-83

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 have loaded the trailer, weigh the trailer and then the tongue separately, to see if the weights are proper. If they are not, you may be able to get them right by moving some items around in the trailer. Trailering may be limited by the vehicle’s ability to carry tongue weight. Tongue weight cannot cause the vehicle to exceed the GVWR (Gross Vehicle Weight Rating) or the RGAWR (Rear Gross Axle Weight Rating). The effect of additional weight may reduce your trailering capacity more than the total of the additional weight.

Consider the following example: A vehicle model base weight is 5,500 lbs (2 495 kg); 2,800 lbs (1 270 kg) at the front axle and 2,700 lbs (1 225 kg) at the rear axle. It has a GVWR of 7,200 lbs (3 266 kg), a RGAWR of 4,000 lbs (1 814 kg) and a GCWR (Gross Combination Weight Rating) of 14,000 lbs (6 350 kg). The trailer rating should be:

You can expect tongue weight to be at least 10 percent of trailer weight (850 lbs (386 kg)) and because the weight is applied well behind the rear axle, the effect on the rear axle will be greater than just the weight itself, as much as 1.5 times as much. The weight at the rear axle could be 850 lbs (386 kg) X 1.5 = 1,275 lbs (578 kg). Since the rear axle already weighs 2,700 lbs (1 225 kg), adding 1,275 lbs (578 kg) brings the total to 3,975 lbs (1 803 kg). This is very close to, but within the limit for RGAWR as well. The vehicle is set to trailer up to 8,500 lbs (3 856 kg).

4-84

But let’s say your specific vehicle is equipped with some of the latest options and you have a front seat passenger and two rear seat passengers with some luggage and gear in the vehicle as well. You may add 300 lbs (136 kg) to the front axle weight and 400 lbs (181 kg) to the rear axle weight. Your vehicle now weighs:

Weight is still below 7,200 lbs (3 266 kg) and you may think that you should subtract 700 additional pounds (318 kg) from your trailering capacity to stay within GCWR limits. Your maximum trailer would only be 7,800 lbs (3 538 kg). You may go further and think you must limit tongue weight to less than 1,000 lbs (454 kg) to avoid exceeding GVWR. But, you must still consider the effect on the rear axle. Because your rear axle now weighs 3,100 lbs (1 406 kg), you can only put 900 lbs (408 kg) on the rear axle without exceeding RGAWR. The effect of tongue weight is about 1.5 times the actual weight. Dividing the 900 lbs (408 kg) by 1.5 leaves you with being able to handle only 600 lbs (272 kg) of tongue weight.

Since tongue weight is usually at least 10 percent of total loaded trailer weight, you can expect that the largest trailer your vehicle can properly handle is 6,000 lbs (2 721 kg). It is important that you make sure your vehicle does not exceed any of its ratings — GCWR, GVWR, RGAWR, Maximum Trailer Rating or Tongue Weight. The only way to be sure you are not exceeding any of these ratings is to weigh your vehicle and trailer. 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 for more information. 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.

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If you use a step-bumper hitch, the bumper could be damaged in sharp turns. Make sure there is ample room when turning to avoid contact between the trailer and the bumper. If you will be pulling a trailer that, when loaded, will weigh more than 5,000 lbs (2 270 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. Always use a sway control if the trailer will weigh more than these limits. You can ask a hitch dealer about sway controls. Fifth Wheel and Gooseneck Trailering Notice: Pulling a fifth-wheel trailer with a vehicle that is equipped with the SS trim package could damage the vehicle. Do not pull a fifth-wheel trailer with a vehicle equipped with the SS trim package. Fifth wheel and gooseneck trailers can be used with many pickup models. These trailers place a larger percentage of the weight (kingpin weight) on the tow vehicle than conventional trailers. Make sure this weight does not cause the vehicle to exceed GAWR or GVWR.

Weight Distributing Hitches and Weight Carrying Hitches

A: Body to Ground Distance

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

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Fifth wheel or gooseneck kingpin weight should be 15 to 25 percent of the trailer weight up to the maximum amount specified in the trailering chart for your vehicle. See “Weight of the Trailer” in this section for more information. The hitch should be located in the pickup bed so that its centerline is over or slightly in front of the rear axle. Take care that it is not so far forward that it will contact the back of the cab in sharp turns. This is especially important for short box pickups. Trailer pin box extensions and sliding fifth wheel hitch assemblies can help this condition. There should be at least six inches of clearance between the top of the pickup box and the bottom of the trailer shelf that extends over the box. Make sure the hitch is attached to the tow vehicle frame rails. Do not use the pickup box for support.

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. Instructions about safety chains may be provided by the hitch manufacturer or by the trailer manufacturer. If you are towing a trailer up to 5,000 lbs (2 271 kg) with a factory-installed step bumper, you may attach the safety chains to the attaching points on the bumper. If you are towing a trailer up to your vehicle’s trailer rating limit you may attach the safety chains to the attaching point on the hitch platform. If you are towing with an aftermarket hitch follow the trailer or hitch manufacturer’s recommendation for attaching safety chains. Always leave just enough slack so you can turn with your rig. Never allow safety chains to drag on the ground.

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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.

Driving with a Trailer

{CAUTION:

If you have a rear-most window open and you pull a trailer with your vehicle, carbon monoxide (CO) could come into your vehicle. You cannot see or smell CO. It can cause unconsciousness or death. See Engine Exhaust on page 2-57. To maximize your safety when towing a trailer: (cid:127) Have your exhaust system inspected for leaks, and make necessary repairs before starting on your trip.

(cid:127) Keep the rear-most windows closed.

If exhaust does come into your vehicle through a window in the rear or another opening, drive with your front, main heating or cooling system on and with the fan on any speed. This will bring fresh, outside air into your vehicle. Do not use the climate control setting for maximum air because it only recirculates the air inside your vehicle. See Climate Control System on page 3-21.

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(cid:127) (cid:127) (cid:127) 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. While towing a trailer or when exposed to long periods of sunshine, the floor of the truck bed may become very warm. Avoid putting items in the truck bed that might be affected by high ambient temperatures.

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. And, 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.

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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. 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.

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If you have an automatic transmission, you can tow in DRIVE (D). You may want to shift the transmission to a lower gear selection if the transmission shifts too often (e.g., under heavy loads and/or hilly conditions). You may also want to activate the tow/haul mode if the transmission shifts too often. See Tow/Haul Mode Light on page 3-50. If you have a 5-speed manual transmission and you are towing a trailer, it’s better not to use FIFTH (5) gear. Just drive in FOURTH (4) gear (or, as you need to, a lower gear). If you have a 6-speed manual transmission and you are towing a trailer, it’s better not to use SIXTH (6) gear. Drive in FIFTH (5) gear (or, as you need to, a lower gear). When towing at high altitude on steep uphill grades, consider the following: Engine coolant at or near sea level will boil at a lower temperature than at higher 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 at least five minutes before turning the engine off. For manual transmissions, let the engine run while parked, preferably on level ground, with the transmission out of gear and the parking brake applied, for at least five minutes before turning the engine off. If you do get the overheat warning, see Engine Overheating on page 5-37.

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 for an automatic transmission, or into gear for a manual transmission.

2. Have someone place chocks under the trailer