Page 225 of 398
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 7-5.
Releasing Air-Operated Parking Brakes
If your vehicle has air brakes, you could have a
special towing problem. If your vehicle has to be towed
because of a complete loss of air pressure from
both systems, the parking brakes will have automatically
engaged. The tow operator can release the brakes
manually by using the following steps. Then your vehicle
can be towed with all wheels or only the rear wheels
on the ground.
1. Block the wheels of the vehicle.2. Remove the release stud and nut from the side of
the brake chamber. Some chambers have studs
which are visible at all times.
4-37
Page 239 of 398

Water In Fuel Light
Problem Recommended Action
Light comes on
intermittently.Drain water from the
fuel filter.
Light stays on at
temperatures above
freezing.Drain the fuel filter
immediately. If no water
can be drained and the
light stays on, see your
dealer for assistance.
Light stays on at
temperatures below
freezing.Drain the fuel filter
immediately. If no water
can be drained, water
may be frozen in the
water drain system, or in
the fuel lines. Move the
vehicle to a warm location
to thaw out, and then
drain the filter system.
Light stays on
immediately after
refueling, and a large
amount of water was
possibly pumped into the
fuel tank.Fuel tank purging is
required. See your dealer
for assistance.Notice:If you drive when this warning indicator is
on, you can damage your fuel injection system
and your engine. If the indicator comes on right after
you refuel, it means water was pumped into your
fuel tank. Turn off your engine immediately.
Then, have the water drained at once.
To drain water, do the following:
1. Stop and park the vehicle in a safe place. Turn off
the engine and apply the parking brake.
2. Remove the fuel cap.
3. Place a fuel-resistant container under the fuel filter.
The filter drain valve is located on the bottom of the
fuel filter.
If your vehicle has the 6.6L engine, the fuel filter is
located in the engine compartment on the driver’s
side of the vehicle. If your vehicle has either
the 7.2L or 7.8L engine, the fuel filters are located
in the engine compartment on the driver’s side
of the vehicle, and on the driver’s side frame rail in
front of the fuel tank.
5-11
Page 383 of 398

Reporting Safety Defects to the
Canadian Government
If you live in Canada, and you believe that your vehicle
has a safety defect, you should immediately notify
Transport Canada, in addition to notifying General
Motors of Canada Limited. You may call them at
1-800-333-0510 or write to:
Transport Canada
Place de Ville Tower C
330 Sparks Street
Ottawa, Ontario K1A 0N5
Reporting Safety Defects to
General Motors
In addition to notifying NHTSA (or Transport Canada) in
a situation like this, we certainly hope you’ll notify us.
Please call us at 1-800-862-4389, or write:
GM Medium Duty Truck
Customer Assistance Center
P.O. Box 44947
Detroit, MI 48244
In Canada, please call us at 1-800-263-3777 (English)
or 1-800-263-7854 (French). Or, write:
General Motors of Canada Limited
Customer Communication Centre, 163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
Service Publications Ordering
Information
Service Manuals
Service Manuals have the diagnosis and repair
information on engines, transmission, axle suspension,
brakes, electrical, steering, body, etc.
Transmission, Transaxle, Transfer
Case Unit Repair Manual
This manual provides information on unit repair service
procedures, adjustments, and specifications for
GM transmissions, transaxles, and transfer cases.
Service Bulletins
Service Bulletins give technical service information
needed to knowledgeably service General Motors cars
and trucks. Each bulletin contains instructions to
assist in the diagnosis and service of your vehicle.
In Canada, information pertaining to Product Service
Bulletins can be obtained by contacting your General
Motors dealer or by calling 1-800-GM-DRIVE
(1-800-463-7483).
7-11
Page 395 of 398

Range Inhibit Warning Indicator........................3-33
Reading Lamps..............................................3-17
Rear Axle......................................................5-64
Differential Lock Control...............................4-11
Shift Motor.................................................5-65
Two-Speed Electric Shift Control....................2-28
Rear Heating System......................................3-24
Rear Outside Passenger Positions, Safety Belts....1-25
Rear Seat Operation......................................... 1-8
Rearview Mirrors.............................................2-47
Reduced Engine Power Light............................3-42
Remote Keyless Entry System............................ 2-3
Remote Keyless Entry System, Operation............ 2-4
Reporting Safety Defects
Canadian Government..................................7-11
General Motors...........................................7-11
United States Government............................7-10
Restraint System Check
Checking the Restraint Systems....................1-62
Replacing Restraint System Parts
After a Crash..........................................1-63
Right Front Passenger Position, Safety Belts......1-23
Roadside
Assistance Program....................................... 7-5
Rocking Your Vehicle to Get it Out....................4-32
Running Out of Fuel........................................5-17
Running the Engine While Parked.....................2-46S
Safety Belt
Reminder Light............................................3-28
Reminder Tone............................................3-28
Safety Belts
Care of ......................................................5-86
Center Passenger Position............................1-24
Driver Position............................................1-15
How to Wear Safety Belts Properly................1-14
Questions and Answers About Safety Belts.....1-14
Rear Outside Passenger Positions.................1-25
Right Front Passenger Position......................1-23
Safety Belt Extender....................................1-28
Safety Belt Use During Pregnancy.................1-23
Safety Belts Are for Everyone......................... 1-9
Shoulder Belt Height Adjuster........................1-22
Safety Warnings and Symbols.............................. iii
Scheduled Maintenance..................................... 6-5
Scheduled Maintenance Supplements.................. 6-4
Seats
Air Suspension Seats.................................... 1-6
Bucket Seats................................................ 1-2
Rear Seat Operation...................................... 1-8
Split Bench Seat........................................... 1-6
11