Page 553 of 596

Engine Oil Level Check
Notice:It is important to check the engine oil
regularly and keep it at the proper level. Failure to
keep the engine oil at the proper level can cause
damage to the engine not covered by your warranty.
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil (Gasoline Engine) on
page 5-15.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-29.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer uid reservoir and add the proper uid if
necessary.
At Least Once a Month
Tire In ation Check
Inspect your vehicle’s tires and make sure they are
in ated to the correct pressures. Do not forget to check
the spare tire. SeeInflation - Tire Pressure on
page 5-76. Check to make sure the spare tire is stored
securely. SeeChanging a Flat Tire on page 5-94.
Tire Wear Inspection
Tire rotation may be required for high mileage highway
drivers prior to the Engine Oil Life System service
noti cation. Check the tires for wear and, if necessary,
rotate the tires. SeeTire Inspection and Rotation on
page 5-83.
6-11
Page 556 of 596

Recommended Fluids and
Lubricants
This maintenance section applies to vehicles with a
gasoline engine. If your vehicle has a diesel engine, see
the maintenance schedule section in the DURAMAX
®
Diesel manual.
Fluids and lubricants identi ed below by name, part
number, or speci cation can be obtained from your
dealer/retailer.
Usage Fluid/Lubricant
Engine OilEngine oil which meets GM
Standard GM6094M and displays
the American Petroleum Institute
Certi ed for Gasoline Engines
starburst symbol. To determine the
proper viscosity for your vehicle’s
engine, seeEngine Oil (Gasoline
Engine) on page 5-15.
Engine Coolant50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
coolant. SeeEngine Coolant on
page 5-29.
Hydraulic Brake
SystemDelco
®Supreme 11 Brake Fluid or
equivalent DOT-3 brake uid.
Windshield
WasherOptikleen
®Washer Solvent.
Usage Fluid/Lubricant
Power Steering
SystemGM Power Steering Fluid
(GM Part No. U.S. 89021184, in
Canada 89021186).
Automatic
TransmissionDEXRON
®-VI Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474).
Floor Shift
LinkageLubriplate Lubricant Aerosol
(GM Part No. U.S. 12346293, in
Canada 992723) or lubricant
meeting requirements of NLGI #2
Category LB or GC-LB.
Chassis
LubricationChassis Lubricant
(GM Part No. U.S. 12377985, in
Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Front Axle
(1500 Series) -
Four-Wheel
DriveSAE 80W-90 Axle Lubricant
(GM Part No. U.S. 89021671, in
Canada 89021672).
Front Axle
(1500 HD,
1500 AWD,
2500, 2500 HD,
and
3500 Series)SAE 75W-90 Synthetic
Axle Lubricant
(GM Part No. U.S. 89021677, in
Canada 89021678) meeting GM
Speci cation 9986115.
6-14
Page 585 of 596

E
EDR .............................................................7-16
Electrical System
Add-On Equipment.....................................5-125
Center Instrument Panel Fuse Block.............5-128
Fuses and Circuit Breakers.........................5-125
Instrument Panel Fuse Block.......................5-126
Power Windows and Other Power Options....5-125
Underhood Fuse Block...............................5-129
Windshield Wiper Fuses.............................5-125
Electronic Immobilizer
PASS-Key
®III+...........................................2-20
Electronic Immobilizer Operation
PASS-Key
®III+...........................................2-20
Engine
Air Cleaner/Filter.........................................5-20
Check and Service Engine Soon Light............3-49
Coolant......................................................5-29
Coolant Heater............................................2-27
Coolant Temperature Gage...........................3-48
Drive Belt Routing.......................................6-17
Engine Compartment Overview......................5-14
Exhaust.....................................................2-54
Fan Noise..................................................5-40
Fast Idle System.........................................2-25
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-34Engine (cont.)
Overheating................................................5-32
Starting......................................................2-24
Entry Lighting.................................................3-21
Event Data Recorders.....................................7-17
Exit Lighting...................................................3-21
Extender, Safety Belt.......................................1-35
Exterior Lamps...............................................3-17
F
Fast Idle System............................................2-25
Filter
Engine Air Cleaner......................................5-20
Finish Damage.............................................5-122
Fixed Mast Antenna.......................................3-134
Flashers, Hazard Warning.................................. 3-8
Flash-to-Pass.................................................3-11
Flat Tire........................................................5-93
Flat Tire, Changing.........................................5-94
Flat Tire, Storing...........................................5-110
Fluid
Automatic Transmission........................5-22, 5-26
Power Steering...........................................5-41
Windshield Washer......................................5-42
Fog Lamp
Fog ...........................................................3-20
Fog Lamp Light..............................................3-53
Four-Wheel Drive....................................2-36, 5-54
5
Page 596 of 596
Windshield
Rainsense™ II Wipers..................................3-12
Washer......................................................3-12
Washer Fluid..............................................5-42
Wiper Blade Replacement.............................5-67
Wiper Blades, Cleaning..............................5-120
Wiper Fuses.............................................5-125
Wipers.......................................................3-11
Winter Driving................................................4-31X
XM Radio Messages.....................................3-119
XM™ Satellite Radio Antenna System..............3-134
Y
Your Vehicle and the Environment....................... 6-2
16