Item Number Item Remarks
19 Release Bearing, Clutch Cross Shaft Two fittings, apply chassis lubricant.
20 Clutch Release Fork Two fittings.
* Applies to some vehicles.
** Applies to air brakes only.
$ Applies to hydraulic brakes only.
Tandem Axle ModelsItem
Number Item Remarks
1 Brake Camshafts One fitting each.
2 Propshaft U-JointOne fitting each
joint. Lubricate
with GM Part
No. 1051344, Wheel
Bearing Lubricant
3 Rear AxlesFill to level of filler
plug.
4Brake Shoe
Roller PinsApply engine oil
at pin to shoe
joint only.
5 Rear Spring PinOne fitting
each side.
5-54
Noise Control System
Tampering with Noise Control
System Prohibited
The following information relates to compliance with
federal noise emission standards for vehicles with
a Gross Vehicle Weight Rating (GVWR) of more than
10,000 lbs (4 536 kg). The Maintenance Schedule
provides information on maintaining the noise control
system to minimize degradation of the noise emission
control system during the life of your vehicle. The noise
control system warranty is given in your warranty
booklet.
These standards apply only to vehicles sold in the
United States.
Federal law prohibits the following acts or the causing
thereof:
1. The removal or rendering inoperative by any
person, other than for purposes of maintenance,
repair or replacement, of any device or element of
design incorporated into any new vehicle for
the purpose of noise control, prior to its sale or
delivery to the ultimate purchaser or while it is in
use; or2. The use of the vehicle after such device or element
of design has been removed or rendered inoperative
by any person.
Among those acts presumed to constitute tampering are
the acts listed below.Insulation:
•
Removal of the noise shields or any underhood
insulation.
Engine:
•
Removal or rendering engine speed governor (if
equipped) inoperative so as to allow engine
speed to exceed manufacturer specifications.
Fan and Drive:
•
Removal of fan clutch (if equipped) or rendering
clutch inoperative.
•Removal of the fan shroud (if equipped).
Air Intake:
•
Removal of the air cleaner silencer.
•Modification of the air cleaner.
Exhaust:
•
Removal of the muffler and/or resonator.
•Removal of the exhaust pipes and exhaust pipe
clamps.
5-62
(11)= Inspect rear axle air shift motor for fluid leaks.
Remove plug to check fluid level. Inspect air lines
and hoses for proper hook-up, binding, leaks, etc.
Inspect at 1,000 miles (1 600 km) and 22,500 miles
(36 000 km) and then every 22,500 miles (36 000 km)
thereafter.
(12)= Chassis Lubrication Service: Lubricate all grease
fittings in front suspension, front axle and steering
linkage. DO NOT lubricate kingpin bushings with air
pressure equipment; instead, use a hand grease gun to
ensure complete purge and eliminate sealer cap
distortion. Front axle tie rod ends, both upper and lower
kingpin fittings and both steering linkage relay rod
ends should be greased with the vehicle loaded on the
ground and wheels turned straight ahead, NOT with
the vehicle on a hoist. Apply kingpin bushing lubricant to
both upper and lower kingpin grease fittings until new
lubricant purges from between the upper shim pack and
thrust bearing. Lubricate transmission and shift
linkage, hood latches and hood hinges, parking brake
lever pivot, clevis pins and linkage, disc brake caliper
rails, clutch linkage and release bearing (if equipped),
bearing pads, propshaft universal joints, brake camshaft
bracket, slack adjusters, pedal shaft, clutch cross
shaft, clutch pedal springs and clutch cable bushing at
transmission. Lubricate suspension, axle and steeringlinkage more often when operating under dusty or
muddy conditions and in excessive off-road use.
Frequently power-washed vehicles will require more
frequent lubrication.
(13)= Check steering system:
•Look for damaged, loose or missing parts. Inspect
the steering linkage relay rod and tie rod ends for
looseness or lack of lubricant. Also look for
parts showing signs of wear or lack of lubrication.
Replace parts as needed. Also check steering gear
mounting bolts, pitman arm nut, gear housing
upper cover and side cover attaching bolts, steering
column mounting bolts and cardan joint clamp
bolts; tighten if necessary. (See service manual.)
•Inspect power steering hoses, tubes and fittings for
leaks. Hoses and lines must not be twisted, kinked
or tightly bent. Make sure clips, clamps, supporting
tubes and hoses are in place and properly
secured.
•Check steering gear for leakage around pitman
shaft and housing. If leakage is evident (lubricant
oozing out, not just oily film), leak should be
corrected immediately.
6-20
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
Care of
Safety Belts................................................5-79
Your Cassette Tape Player............................3-57
Your CD Player...........................................3-59
Your CDs ...................................................3-59
Cassette Tape Messages.................................3-52
CD Adapter Kits.............................................3-52
Center Console Storage Area...........................2-42
Center Passenger Position, Safety Belts.............1-22
Charging System Light....................................3-30
Chassis Lubrication.........................................5-51
Check
Engine Light...............................................3-37
Gages Warning Light...................................3-42
Checking Coolant............................................5-34
Checking Engine Oil................................5-21, 5-25
Checking Things Under the Hood......................5-18
Checking Your Restraint Systems......................1-61
Chemical Paint Spotting...................................5-83
Child Restraints
Child Restraint Systems...............................1-33
Infants and Young Children...........................1-29
Older Children.............................................1-27
Securing a Child Restraint in a Rear
Outside Seat Position...............................1-39
Securing a Child Restraint in the Center
Rear Seat Position (Crew Cab
®) or Center
Front Position..........................................1-41Child Restraints (cont.)
Securing a Child Restraint in the Right
Front Seat Position...................................1-43
Top Strap...................................................1-38
Where to Put the Restraint...................1-35, 1-37
Chime Level Adjustment..................................3-59
Chugger-Snubber Lock-Out Feature.................... 1-7
Cigarette Lighter.............................................3-18
Cleaning
Inside of Your Vehicle..................................5-77
Outside of Your Vehicle................................5-80
Underbody Maintenance...............................5-83
Weatherstrips..............................................5-79
Cleaning Exterior Lamps/Lenses.......................5-80
Cleaning Fabric/Carpet....................................5-77
Cleaning Glass Surfaces..................................5-79
Cleaning Interior Plastic Components.................5-79
Cleaning the Top of the
Instrument Panel.........................................5-79
Cleaning Vinyl................................................5-78
Climate Control System...................................3-19
Outlet Adjustment........................................3-22
Rear Heating System...................................3-23
Clutch Brake (Vehicles with Non-Synchronized
Transmission)..............................................2-32
Clutch Pedal Free Travel.................................5-51
Cold Weather Starting (Diesel Engine)...............2-20
Cold Weather Starting
(Caterpillar
®Diesel).....................................2-15
3
Compact Disc Messages..................................3-56
Control of a Vehicle.......................................... 4-5
Coolant
Engine Temperature Gage............................3-35
Heater, Engine............................................2-23
Low Warning Light.......................................3-36
Surge Tank Pressure Cap.............................5-35
Cooling System..............................................5-38
Cooling System Capacity.................................5-94
Cruise Control................................................3-10
Current and Past Model Order Forms.................. 7-8
Customer Assistance Information
Customer Assistance for Text Telephone
(TTY) Users.............................................. 7-3
Customer Assistance Offices........................... 7-3
Customer Satisfaction Procedure..................... 7-2
Reporting Safety Defects to General Motors...... 7-7
Reporting Safety Defects to the Canadian
Government.............................................. 7-7
Reporting Safety Defects to the United
States Government.................................... 7-6
Roadside Assistance Program......................... 7-4
Service Publications Ordering Information......... 7-7
D
Daytime Running Lamps..................................3-14
Daytime Running Lamps Indicator Light.............3-41
Defensive Driving............................................. 4-2Defogging and Defrosting.................................3-20
Defroster Check..............................................6-27
Diesel Engine
Exhaust Brake............................................2-25
Fuel............................................................ 5-8
Starting......................................................2-14
Starting Your DURAMAX™...........................2-19
Diesel Engine Warm-Up...................................2-16
Differential Lock Control, Inter-Axle....................4-10
Differential Lock Control, Rear Axle...................4-10
Differential Lock Indicator Light.........................3-40
Doing Your Own Service Work........................... 5-4
Dome Lamps.................................................3-15
Door
Locks.......................................................... 2-6
Power Door Locks......................................... 2-7
Door Latches Check........................................6-27
Double-Clutching.............................................2-30
Driver
Position, Safety Belt.....................................1-13
Driving
At Night.....................................................4-17
City...........................................................4-21
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-22
Hill and Mountain Roads..............................4-23
In Rain and on Wet Roads...........................4-18
Winter........................................................4-25
4
United States................................................... 7-4
Used Replacement Wheels..............................5-75
Using Cleaner on Fabric..................................5-78
Using the Clutch.............................................2-30
Using the Tow Hooks......................................4-30
V
Vehicle
Control........................................................ 4-5
Damage Warnings........................................... iv
Loading......................................................4-33
Symbols......................................................... iv
Vehicle Data Collection and Event
Data Records............................................... 7-5
Vehicle Identification
Number (VIN).............................................5-85
Service Parts Identification Label...................5-86
Service Statement.......................................5-85
Vehicle Storage..............................................5-55
Ventilation Adjustment......................................3-22
Visors...........................................................2-10
Voltmeter Gage..............................................3-30
W
Wait to Start Indicator......................................3-36
Warning Lights, Gages and Indicators................3-23Warnings
Hazard Warning Flashers............................... 3-5
Other Warning Devices.................................. 3-6
Safety and Symbols......................................... iii
Vehicle Damage.............................................. iv
Washer Fluid, Low Warning Light......................3-42
Washing Your Vehicle......................................5-80
Water
Fuel..........................................................5-10
Water in Fuel Warning Light.............................3-43
Weatherstrip Lubrication...................................6-25
What Fuel to Use............................................. 5-8
What Fuel to Use in Canada.............................. 5-9
What Kind of Engine Oil to Use................5-22, 5-28
What to Do with Used Oil........................5-25, 5-29
What to Use..................................5-33, 5-44, 5-61
Wheels
Alignment and Tire Balance..........................5-70
Front Bearings with Oil-Filled Hubs................5-67
Replacement...............................................5-74
Rims.........................................................5-69
Tightening the Wheel Nuts............................5-71
When to Add Engine Oil..........................5-21, 5-27
When to Change Engine Oil.............................5-29
When to Change Engine Oil
(GM Oil Life System)...................................5-24
When to Check..............................5-31, 5-32, 5-69
15