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. 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.
Usage Fluid/Lubricant
Engine Oil
(Caterpillar
®
Diesel Engine)See the Caterpillar
®Operation &
Maintenance Manual for engine oil
recommendations.
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. See “Engine
Coolant” in the Index.
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
®-III Automatic
Transmission Fluid.
6-29
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 write to:
Transport Canada
330 Sparks Street
Tower C
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 48244In 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.
RETAIL SELL PRICE: $120.00
7-7
Exhaust Restrictor (Diesel Engines)...................2-18
Exhaust System Check....................................6-27
Express-Down Feature.....................................2-10
Extender, Safety Belt.......................................1-26
Exterior Lamps...............................................3-13
F
Filter
Engine Air Cleaner......................................5-30
Filter Minder Gage..........................................3-44
Finding a Station............................3-46, 3-49, 3-53
Finish Care....................................................5-80
Finish Damage...............................................5-83
Fixed Mast Antenna........................................3-59
Flat Tire........................................................5-75
Flat Tire, Changing.........................................5-76
Fluid
Automatic Transmission................................5-31
Manual Transmission....................................5-32
Power Steering...........................................5-43
Windshield Washer......................................5-44
Fluid Leaks Check..........................................6-28
FM ...............................................................3-57
Folding the Rear Seat (Crew Cab).................... 1-7
Footnotes......................................................6-19
Fore-and-Aft Adjustment.................................... 1-4Four-Wheel and Six-Wheel Drum Brakes
(Air Only)...................................................5-49
Four-Wheel Disc Brakes
(Hydraulic Only)..........................................5-49
Front Wheel Bearings with Oil-Filled Hubs..........5-67
Fuel............................................................... 5-6
Additives...................................................... 5-7
Diesel Engine Fuel........................................ 5-8
Filling a Portable Fuel Container....................5-18
Filling Your Tank..........................................5-17
Filter..........................................................5-64
Filter Replacement.......................................5-15
Fuels in Foreign Countries............................5-16
Gage.........................................................3-42
Gasoline Octane........................................... 5-6
Gasoline Specifications.................................. 5-6
Primary Filter and Water Separator................5-65
Running Out of Fuel....................................5-15
Secondary Filter and Water Separator/Heater....5-66
Very Cold Weather Operation........................5-10
Water in Fuel..............................................5-10
Water in Warning Light.................................3-43
What Fuel to Use.......................................... 5-8
Fuel Filter (Diesel Engines)..............................5-65
Fuel Filter (Gasoline Engines)...........................5-64
Fuel Priming..................................................5-13
Fuses
Fuses and Circuit Breakers...........................5-87
Windshield Wiper.........................................5-87
6
G
Gage
Air Pressure...............................................3-44
Check Gages Warning Light..........................3-42
Engine Coolant Temperature.........................3-35
Filter Minder...............................................3-44
Fuel..........................................................3-42
Hourmeter..................................................3-45
Oil Pressure...............................................3-37
Speedometer..............................................3-25
Tachometer.................................................3-26
Transmission Temperature.............................3-40
Voltmeter Gage...........................................3-30
Gasoline
Octane........................................................ 5-6
Specifications............................................... 5-6
Gasoline Engine, Starting.................................2-12
Gasoline Engine Warm-Up...............................2-14
Glass, Mirrors, Lamps and/or Reflectors
Condition Check..........................................6-27
H
Hazard Warning Flashers................................... 3-5
Headlamp High/Low-Beam Changer.................... 3-8
Headlamp Wiring............................................5-86Headlamps On Reminder.................................3-13
Heavy-Duty Trailer Wiring Package....................4-35
Height Adjustment............................................. 1-6
High Idle System (Caterpillar
®Diesel and
Gasoline Engines).......................................2-16
Highway Hypnosis...........................................4-23
Hill and Mountain Roads..................................4-23
Hood
Checking Things Under................................5-18
Latches......................................................5-19
Hood Latches Check.......................................6-28
Horn............................................................... 3-6
Hourmeter Gage.............................................3-45
How to Add Coolant to the Coolant
Surge Tank.................................................5-39
How to Add Fluid............................................5-32
How to Check................................................5-69
How to Check and What to Use...............5-31, 5-32
How to Check Fluid........................................5-61
How to Check Lubricant...................................5-61
How To Check Power Steering Fluid..................5-43
How to Inspect the Engine Air Cleaner/Filter.......5-30
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-13
Hydraulic Brake System
Warning Lights............................................3-32
Hydraulic Brake Systems................................... 4-6
Hydraulic Brakes.............................................2-33
Hydroplaning..................................................4-20
7
P
Parking.........................................................2-33
Brake Warning Light....................................3-34
Over Things That Burn.................................2-37
Parking Brake Check.......................................6-25
Part A - Scheduled Maintenance Services............ 6-4
Part B - Owner Checks and Services................6-24
Part C - Recommended Fluids and Lubricants....6-29
Part D - Maintenance Record...........................6-31
Passing.........................................................4-14
Playing a Cassette..........................................3-50
Playing a Compact Disc...................................3-55
Playing the Radio...........................3-46, 3-48, 3-53
Power
Accessory Outlets........................................3-17
Door Locks.................................................. 2-7
Electrical System.........................................5-87
Reduced Engine Light..................................3-41
Steering Fluid.............................................5-43
Windows...................................................... 2-9
Power Steering...............................................4-12
Propshaft Park Brake Burnish Procedure............2-34
Q
Questions and Answers About Safety Belts.........1-12
R
Radio Messages.............................3-48, 3-50, 3-55
Radios..........................................................3-45
AM-FM Radio.............................................3-46
Care of Your Cassette Tape Player................3-57
Care of Your CD Player...............................3-59
Care of Your CDs........................................3-59
Radio with Cassette.....................................3-48
Radio with CD............................................3-53
Setting the Time..........................................3-45
Theft-Deterrent............................................3-57
Understanding Reception..............................3-57
Range Inhibit Warning Indicator........................3-31
Reading Lamps..............................................3-16
Rear Axle......................................................5-61
Differential Lock Control...............................4-10
Shift Motor.................................................5-61
Two-Speed Electric Shift Control....................2-26
Rear Heating System......................................3-23
Rear Seat Operation......................................... 1-7
11
Safety Belts (cont.)
Safety Belt Extender....................................1-26
Safety Belt Use During Pregnancy.................1-21
Safety Belts Are for Everyone......................... 1-8
Safety Warnings and Symbols.............................. iii
Scheduled Maintenance..................................... 6-5
Scheduled Maintenance Supplements.................. 6-4
Seat Adjuster Check........................................6-27
Seatback Adjustment......................................... 1-3
Seats
Air Suspension Seats.................................... 1-6
Manual........................................................ 1-2
Rear Seat Operation...................................... 1-7
Reclining Seatbacks...................................... 1-4
Split Bench Seat........................................... 1-6
Securing a Child Restraint
Center Rear Seat Position (Crew Cab) or
Center Front Position................................1-41
Rear Outside Seat Position...........................1-39
Right Front Seat Position..............................1-43
Service........................................................... 5-3
Doing Your Own Work................................... 5-4
Engine Soon Light.......................................3-37
Publications Ordering Information..................... 7-7
Transmission Warning Light..........................3-31
Two Safety Cautions about Engine Fan
Breakage.................................................. 5-5Service Bulletins............................................... 7-8
Service Engine Soon Light...............................3-37
Service Manuals............................................... 7-7
Servicing Your Air Bag-Equipped Vehicle............1-60
Setting Preset Stations....................3-47, 3-49, 3-54
Setting the Time.............................................3-45
Setting the Tone (Bass/Treble)..........3-47, 3-49, 3-54
Sheet Metal Damage.......................................5-82
Shoulder Belt Height Adjuster...........................1-15
Skidding........................................................4-16
Sliding Rear Windows.....................................2-10
Some Other Rainy Weather Tips.......................4-20
Special Fabric Cleaning Problems.....................5-78
Specifications, Capacities.................................5-93
Speedometer..................................................3-25
Split Bench Seat.............................................. 1-6
Starter Motor Operation...................................2-13
Starter Switch Check.......................................6-26
Starting Your Diesel Engine..............................2-14
Starting Your DURAMAX™ Diesel Engine...........2-19
Starting Your Engine...............................2-13, 2-19
Starting Your Gasoline Engine..........................2-12
Steering........................................................4-12
Steering Check...............................................6-26
Steering in Emergencies..................................4-13
Steering Tips..................................................4-12
Stopping the Diesel Engine..............................2-15
Stopping the Gasoline Engine...........................2-14
13