Part C: Recommended Fluids
and Lubricants
Fluids and lubricants identified below by name, part
number, or specification may be obtained from
your dealer.
Usage Fluid/Lubricant
Engine Oil
(Gasoline
Engine)Engine oil which meets GM
Standard GM6094M and displays
the American Petroleum Institute
Certified for Gasoline Engines
starburst symbol. GM Goodwrench
®
oil meets all the requirements for
your vehicle. To determine the
proper viscosity for your vehicle’s
engine, see “Engine Oil” in the
Index.
Engine Oil
(DURAMAX
®
Diesel Engine)Engine oil with the letters CI-4 or
CH-4 is best for your vehicle. The
CI-4 or CH-4 designation may
appear either alone or in
combination with other API
designations, such as API CI-4/SL.
These letters show American
Petroleum Institute levels of quality.
To determine the preferred viscosity
for your vehicle’s diesel engine, see
“Engine Oil” in the Index.
Engine Oil
(Caterpillar
®
Diesel Engine)See the Caterpillar
®Operation &
Maintenance Manual for engine oil
recommendations.
Usage Fluid/Lubricant
Engine Coolant
(Caterpillar
®
Diesel Engine)See the Caterpillar
®Operation &
Maintenance Manual for engine
coolant recommendations.
Engine Coolant
(Gasoline
Engine &
DURAMAX
®
Diesel)50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant
(Gas and DURAMAX®Engines) on
page 5-38orEngine Coolant
(Caterpillar
®Diesel Engines) on
page 5-40.
Hydraulic Brake
SystemDelco
®Supreme 11 Brake Fluid or
equivalent DOT-3 brake fluid.
Windshield
Washer SolventGM Optikleen
®Washer Solvent.
Clutch Bearing
LubricantClutch Bearing Lubricant
(GM Part No. 12378484 or
equivalent NLGI #3 consistency).
Exhaust Brake
Ball Joint Cap
LubricantHigh-Temperature Grease
(GM Part No. U.S. 1051344, in
Canada 903037) or NLGI #3
consistency.
Power Steering
SystemDEXRON
®-VI Automatic
Transmission Fluid.
Manual
Transmission
(Except ZF
6-Speed)Synthetic Manual Transmission Fluid
(GM Part No. U.S. 12345724, in
Canada 10953510).
6-33
Canadian Roadside Assistance
In Canada, Medium Duty trucks are not eligible
for Roadside Assistance services. However,
owners/operators who contact Roadside Assistance
by calling1-800-268-6800may have a tow arranged
for them at the owner/operator expense.
If a Medium Duty truck is towed to the nearest General
Motors dealership and the towing was necessary
due to failure of a warranted part, the dealer will accept
the towing charges and submit them as part of the
warranty claim.
Vehicle Data Collection and
Event Data Recorders
Your vehicle, like other modern motor vehicles, has a
number of sophisticated computer systems that
monitor and control several aspects of the vehicle’s
performance. Your vehicle uses on-board vehicle
computers to monitor emission control components to
optimize fuel economy, to monitor conditions for
airbag deployment and, if so equipped, to provide
anti-lock braking and to help the driver control the
vehicle in difficult driving situations.Some information may be stored during regular
operations to facilitate repair of detected malfunctions;
other information is stored only in a crash event by
computer systems, such as those commonly called
event data recorders (EDR).
In a crash event, computer systems, such as the Airbag
Sensing and Diagnostic Module (SDM) in your vehicle
may record information about the condition of the vehicle
and how it was operated, such as data related to
engine speed, brake application, throttle position, vehicle
speed, safety belt usage, airbag readiness, airbag
performance, and the severity of a collision. This
information has been used to improve vehicle crash
performance and may be used to improve crash
performance of future vehicles and driving safety. Unlike
the data recorders on many airplanes, these on-board
systems do not record sounds, such as conversation of
vehicle occupants.
7-6
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
A
Accessory Power Outlet(s)...............................3-19
Adding a Snow Plow or Similar Equipment.........4-36
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-61
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment............................5-92
Air Brake.......................................................2-42
Air Cleaner/Filter, Engine.................................5-35
Air Conditioning..............................................3-20
Air Conditioning System...................................5-74
Air Pressure Gage..........................................3-47
Air Shift Control..............................................2-29
Air Suspension...............................................2-44
Air Suspension Seats........................................ 1-6
Airbag
Off Light.....................................................3-30
Readiness Light..........................................3-29
Airbag Sensing and Diagnostic Module (SDM)........ 7-6
Airbag System................................................1-50
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-61
Airbag Off Switch........................................1-58
How Does an Airbag Restrain?......................1-56
Servicing Your Airbag-Equipped Vehicle..........1-61
What Makes an Airbag Inflate?......................1-56
What Will You See After an Airbag Inflates?....1-56Airbag System (cont.)
When Should an Airbag Inflate?....................1-55
Where Are the Airbags?...............................1-54
AM-FM Radio.................................................3-50
Antenna, Fixed Mast.......................................3-67
Anti-Lock Brake System (ABS)........................... 4-8
Anti-Lock Brake, System Warning Light..............3-35
Anti-Lock Brakes, Trailer System
Warning Light.............................................3-36
Appearance Care
Aluminum or Chrome-Plated Wheels..............5-89
Care of Safety Belts....................................5-86
Chemical Paint Spotting...............................5-90
Cleaning Exterior Lamps/Lenses....................5-87
Cleaning the Inside of Your Vehicle................5-83
Fabric/Carpet..............................................5-85
Finish Care.................................................5-87
Finish Damage............................................5-89
Instrument Panel, Vinyl, and Other
Plastic Surfaces.......................................5-86
Sheet Metal Damage...................................5-89
Tires..........................................................5-89
Underbody Maintenance...............................5-90
Vehicle Care/Appearance Materials................5-90
Washing Your Vehicle...................................5-87
Weatherstrips..............................................5-86
Windshield and Wiper Blades........................5-88
Ashtray(s)......................................................3-20
1
Audio System(s).............................................3-48
AM-FM Radio.............................................3-50
Care of Your Cassette Tape Player................3-65
Care of Your CD Player...............................3-67
Care of Your CDs ........................................3-66
Chime Level Adjustment...............................3-67
Fixed Mast Antenna.....................................3-67
Radio with Cassette.....................................3-53
Radio with CD............................................3-59
Setting the Time..........................................3-49
Theft-Deterrent Feature................................3-64
Understanding Radio Reception.....................3-64
Automatic Ether Injection System......................5-72
Automatic Transmission
Fluid..........................................................5-36
Operation...................................................2-30
Axle, Two-Speed Rear Axle Electric
Shift Control...............................................2-28
B
Battery..........................................................5-58
Bench Seat, Split............................................. 1-6
Brake
Anti-Lock Brake System (ABS)........................ 4-8
Diesel Engine Exhaust.................................2-27
Emergencies................................................ 4-9
Exhaust Indicator Light.................................3-41Brake (cont.)
Hydraulic Systems......................................... 4-7
System Warning Light..................................3-33
Trailer Hand Control Valve............................4-10
Brakes..........................................................5-49
Air .............................................................2-42
Hydraulic....................................................2-40
Propshaft Brake Burnish Procedure................2-41
Braking........................................................... 4-6
Braking in Emergencies..................................... 4-9
Break-In, New Vehicle.....................................2-11
Bucket Seats................................................... 1-2
Bulb Replacement...........................................5-68
C
California Proposition 65 Warning....................... 5-3
Canadian Owners................................................ ii
Capacities and Specifications............................5-99
Carbon Monoxide...................................2-45, 4-27
Care of
Safety Belts................................................5-86
Your Cassette Tape Player............................3-65
Your CD Player...........................................3-67
Your CDs ...................................................3-66
Center Console Storage Area...........................2-49
Center Passenger Position, Safety Belts.............1-24
Charging System Light....................................3-31
2
Customer Assistance Information (cont.)
Reporting Safety Defects to the
United States Government.........................7-10
Roadside Assistance Program......................... 7-5
Service Publications Ordering Information........7-11
D
Daytime Running Lamps..................................3-15
Daytime Running Lamps Indicator Light.............3-43
Defensive Driving............................................. 4-2
Diesel Engine
Engine Alarm and Automatic Shutdown...........2-20
Exhaust Brake............................................2-27
Exhaust Restrictor.......................................2-22
Fuel............................................................ 5-7
High Idle System.........................................2-21
Starting......................................................2-15
Differential Lock Control, Rear Axle...................4-11
Differential Lock Indicator Light.........................3-42
Doing Your Own Service Work........................... 5-4
Dome Lamps .................................................3-16
Door
Locks.......................................................... 2-6
Power Door Locks......................................... 2-7Driver
Position, Safety Belt.....................................1-15
Driving
At Night.....................................................4-18
City ...........................................................4-23
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Freeway.....................................................4-24
Hill and Mountain Roads..............................4-26
In Rain and on Wet Roads...........................4-20
Rocking Your Vehicle to Get it Out.................4-32
Tow Hooks.................................................4-33
Winter........................................................4-27
Dual Tire Operation.........................................5-76
E
Electrical System
Add-On Equipment......................................5-92
Fuses and Circuit Breakers...........................5-93
Fusible Links..............................................5-93
Headlamp Wiring.........................................5-93
Instrument Panel Fuse Block.........................5-94
Power Windows and Other Power Options......5-93
Underhood Fuse Block.................................5-96
Windshield Wiper Fuses...............................5-93
4
Engine
Air Cleaner/Filter.........................................5-35
Alarm and Automatic Shutdown.....................2-20
Battery.......................................................5-58
Change Engine Oil Light...............................3-40
Check and Service Engine Soon Light............3-38
Checks Before Operating..............................2-24
Coolant..............................................5-38, 5-40
Coolant Heater............................................2-26
Coolant Temperature Gage...........................3-36
Diesel Engine Exhaust Brake........................2-27
Exhaust.....................................................2-45
Exhaust Restrictor.......................................2-22
Fan Breakage............................................... 5-5
Fan Noise..................................................5-47
High Idle System.........................................2-21
Oil .....................................................5-24, 5-28
Oil Life System...........................5-31, 5-33, 5-34
Overheating................................................5-40
Overspeed Warning Light..............................3-40
Reduced Power Light...................................3-42
Shutdown Warning Light...............................3-40
Speed Limiter.............................................3-28
Starter Over-Crank Protection........................2-12
Starting Your Diesel.....................................2-15
Starting Your Gasoline..................................2-13Entry Lighting.................................................3-17
Event Data Recorders (EDR)............................. 7-6
Exhaust Brake Indicator Light...........................3-41
Exhaust Restrictor...........................................2-22
Extender, Safety Belt.......................................1-28
Exterior Lamps...............................................3-14
F
Filter
Engine Air Cleaner......................................5-35
Filter Minder Gage..........................................3-46
Finish Damage...............................................5-89
Fixed Mast Antenna........................................3-67
Flashers, Hazard Warning.................................. 3-6
Flat Tire........................................................5-82
Fluid
Automatic Transmission................................5-36
Manual Transmission....................................5-37
Power Steering...........................................5-47
Windshield Washer......................................5-48
Four-Wheel Drive....................................2-35, 5-65
Front Axle......................................................5-66
Front Wheel Bearings with Oil-Filled Hubs..........5-73
5
H
Hazard Warning Flashers................................... 3-6
Headlamp Wiring............................................5-93
Headlamps
Bulb Replacement.......................................5-68
Daytime Running Lamps...............................3-15
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-15
Heater...........................................................3-20
High Idle System............................................2-21
Highbeam On Light.........................................3-43
Highway Hypnosis...........................................4-25
Hill and Mountain Roads..................................4-26
Hood
Checking Things Under................................5-22
Latches......................................................5-22
Horn ............................................................... 3-6
Hourmeter Gage.............................................3-47
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-14
Hydraulic Brake Systems................................... 4-7
Hydraulic Brakes.............................................2-40
I
Ignition Positions.............................................2-12
Infants and Young Children, Restraints...............1-31
Inflation - Tire Pressure...................................5-75
Instrument Panel
Overview..................................................... 3-4
Switchbank.................................................3-18
Instrument Panel (I/P)
Brightness..................................................3-16
Cluster.......................................................3-26
J
Jump Starting.................................................5-59
K
Keyless Entry System....................................... 2-3
Keys............................................................... 2-2
7