(f)Lubricate all key lock cylinders, body door hinges,
hood latch assembly, secondary latch, pivots, spring
anchor, release pawl, tailgate hinges, tailgate linkage,
tailgate handle pivot points, latch bolt, fuel door hinge,
locks, and folding seat hardware. More frequent
lubrication may be required when exposed to a corrosive
environment. Applying silicone grease on weatherstrips
with a clean cloth will make them last longer, seal better,
and not stick or squeak.
(g)Check vent hose at transfer case for kinks and proper
installation. Check to be sure vent hose is unobstructed,
clear, and free of debris. During any maintenance, if a
power washer is used to clean mud and dirt from the
underbody, care should be taken to not directly spray the
transfer case output seals. High pressure water can
overcome the seals and contaminate the transfer case
fluid. Contaminated fluid will decrease the life of the
transfer case and should be replaced.
(h)Change automatic transmission fluid and filter if
the vehicle Gross Vehicle Weight Rating (GVWR) is over
8600 lbs or if the vehicle is mainly driven under one
or more of these conditions:
In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.(i)Drain, flush, and refill cooling system. This service
can be complex; you should have your dealer/retailer
perform this service. See Engine Coolant on page 5-29
for what to use. Inspect hoses. Clean radiator,
condenser, pressure cap, and filler neck. Pressure test
the cooling system and pressure cap.
(j)A fluid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired and
the fluid level checked. Add fluid if needed.
(k)Inspect system. Check all fuel and vapor lines and
hoses for proper hook-up, routing, and condition. Check
that the purge valve, if the vehicle has one, works
properly. Replace as needed.
(l)Extreme Duty Service: Change transfer case fluid if
the vehicle is mainly driven off-road in four-wheel
drive. Vehicles used for farming, mining, forestry,
Department of Natural Resources (DNR), and snow
plowing occupations meet this definition.
(m)Severe Duty Service: Change transfer case fluid if
the vehicle is mainly driven under one or more of
these conditions:
Frequent trailer towing.
Taxi, police, or delivery service.
6-10
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 the 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 5-73.
Check to make sure the spare tire is stored securely.
SeeChanging a Flat Tire on page 5-92.
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 5-81.
At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the vehicle
could move suddenly. If the vehicle moves, you or
others could be injured.
1. Before starting this check, be sure there is enough
room around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. SeeParking Brake on page 2-50.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle
should start only in P (Park) or N (Neutral). If the
vehicle starts in any other position, contact
your dealer/retailer for service.
6-12
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 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.
6-15
Center Seat...................................................1-14
Chains, Tire...................................................5-90
Charging System Light....................................3-41
Check
Engine Lamp..............................................3-45
Checking Things Under the Hood......................5-12
Chemical Paint Spotting.................................5-120
Child Restraints
Child Restraint Systems...............................1-45
Infants and Young Children...........................1-41
Lower Anchors and Tethers for Children..........1-49
Older Children.............................................1-38
Securing a Child Restraint in a Rear
Seat Position...........................................1-58
Securing a Child Restraint in the
Center Front Seat Position........................1-61
Securing a Child Restraint in the
Right Front Seat Position..........1-62, 1-66, 1-70
Where to Put the Restraint...........................1-48
Cigarette Lighter.............................................3-23
Cleaning
Aluminum or Chrome-Plated Wheels.............5-119
Exterior Lamps/Lenses................................5-117
Fabric/Carpet............................................5-115
Finish Care...............................................5-118
Instrument Panel, Vinyl, and Other
Plastic Surfaces.....................................5-116
Interior.....................................................5-113
Leather....................................................5-115
Tires........................................................5-120Cleaning (cont.)
Underbody Maintenance.............................5-120
Washing Your Vehicle.................................5-117
Weatherstrips............................................5-116
Windshield and Wiper Blades......................5-118
Climate Control System...........................3-24, 3-25
Dual Automatic............................................3-27
Outlet Adjustment........................................3-33
Clock, Setting.................................................3-86
Collision Damage Repair..................................7-11
Compass.......................................................3-63
Content Theft-Deterrent....................................2-18
Control of a Vehicle.......................................... 4-3
Coolant
Engine.......................................................5-29
Engine Temperature Gage............................3-44
Cooling System..............................................5-28
Cruise Control................................................3-13
Cruise Control Light........................................3-50
Cupholders....................................................2-81
Customer Assistance Information
Courtesy Transportation................................7-10
Customer Assistance for Text Telephone
(TTY) Users.............................................. 7-6
Customer Assistance Offices........................... 7-6
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-7
Reporting Safety Defects to General Motors.......7-15
Reporting Safety Defects to the Canadian
Government............................................7-15
3
Electrical System (cont.)
Underhood Fuse Block...............................5-126
Windshield Wiper Fuses.............................5-122
Electronic Immobilizer
PASS-Key
®III+...........................................2-20
Electronic Immobilizer Operation
PASS-Key
®III+...........................................2-20
Engine
Air Cleaner/Filter.........................................5-19
Check and Service Engine Soon Lamp...........3-45
Coolant......................................................5-29
Coolant Heater............................................2-27
Coolant Temperature Gage...........................3-44
Drive Belt Routing.......................................6-18
Engine Compartment Overview......................5-14
Exhaust.....................................................2-55
Fan Noise..................................................5-37
Fast Idle System.........................................2-25
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-37
Overheating................................................5-34
Starting......................................................2-24
Entry Lighting.................................................3-20
Event Data Recorders.....................................7-17
Exit Lighting...................................................3-20
Extender, Safety Belt.......................................1-37
Exterior Lamps...............................................3-16
F
Fast Idle System............................................2-25
Filter
Engine Air Cleaner......................................5-19
Finish Damage.............................................5-120
Fixed Mast Antenna.......................................3-142
Flashers, Hazard Warning.................................. 3-8
Flash-to-Pass.................................................3-10
Flat Tire........................................................5-91
Flat Tire, Changing.........................................5-92
Flat Tire, Storing...........................................5-109
Fluid
Automatic Transmission........................5-21, 5-24
Power Steering...........................................5-38
Windshield Washer......................................5-39
Fog Lamp
Fog ...........................................................3-19
Fog Lamp Light..............................................3-50
Four-Wheel Drive....................................2-37, 5-51
Four-Wheel-Drive Light....................................3-51
Front Axle......................................................5-53
Fuel............................................................... 5-6
Additives...................................................... 5-7
California Fuel.............................................. 5-7
Driving for Better Economy............................. 4-2
E85 (85% Ethanol)........................................ 5-8
Filling a Portable Fuel Container....................5-12
Filling the Tank...........................................5-10
5
Fuel (cont.)
Fuels in Foreign Countries.............................. 5-9
Gage .........................................................3-51
Gasoline Octane........................................... 5-6
Gasoline Speci cations.................................. 5-7
Low Warning Light.......................................3-52
Fuses
Center Instrument Panel Fuse Block.............5-125
Fuses and Circuit Breakers.........................5-122
Instrument Panel Fuse Block.......................5-123
Underhood Fuse Block...............................5-126
Windshield Wiper.......................................5-122
G
Gage
Engine Coolant Temperature.........................3-44
Fuel..........................................................3-51
Oil Pressure...............................................3-48
Speedometer..............................................3-35
Tachometer.................................................3-35
Voltmeter Gage...........................................3-41
Garage Door Opener.......................................2-74
Gasoline
Octane........................................................ 5-6
Speci cations............................................... 5-7
Glove Box.....................................................2-81
GM Mobility Reimbursement Program.................. 7-7
H
Hazard Warning Flashers................................... 3-8
Head Restraints............................................... 1-3
Headlamp
Aiming .......................................................5-55
Headlamps....................................................5-58
Bulb Replacement.......................................5-58
Daytime Running Lamp................................3-17
Exterior Lamps............................................3-16
Flash-to-Pass..............................................3-10
Halogen Bulbs............................................5-58
High/Low Beam Changer..............................3-10
On Reminder..............................................3-17
Pickup Box Identi cation and Fender
Marker Lamps.........................................5-60
Heated Seats................................................... 1-8
Heater...................................................3-24, 3-25
Engine Coolant...........................................2-27
Heater...........................................................3-27
Highbeam On Light.........................................3-50
High-Speed Operation, Tires.............................5-74
Highway Hypnosis...........................................4-26
Hill and Mountain Roads..................................4-27
Hood
Checking Things Under................................5-12
Release.....................................................5-13
Horn ............................................................... 3-8
How to Wear Safety Belts Properly...................1-21
6