
Part B: Owner Checks and Services
These owner checks and services should be performed
at the intervals specified to help ensure vehicle
safety, dependability, and emission control performance.
For your safety and that of others, any of the
safety-related components that may have been
damaged in an accident should be checked and any
needed repairs made before operating the vehicle.
At the minimum, these routine checks should be made
every 6 months or 6,000 miles (10 000 km), whichever
occurs first. Whenever repairs are needed, have
them completed before operating the vehicle.
At Each Fuel Fill
It is important to perform these underhood checks at
each fuel fill.
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 the vehicle
warranty.Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil (DURAMAX Diesel Engine)
on page 5-24orEngine Oil (Caterpillar Diesel Engine)
on page 5-27orEngine Oil (Isuzu Diesel Engine) on
page 5-28orEngine Oil (Gasoline Engine) on page 5-32.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
(Caterpillar Diesel Engines) on page 5-47.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the windshield
washer fluid reservoir and add the proper fluid if
necessary. SeeWindshield Washer Fluid on page 5-50.
Tire Inflation Check
Check tire inflation cold. Make sure the tires are inflated
to the correct pressures. SeeLoading the Vehicle on
page 4-20andInflation - Tire Pressure on page 5-77.
6-26

Part C: Recommended Fluids and
Lubricants
Fluids and lubricants identified below by name, part
number, or specification can be obtained from your
dealer/retailer.
Usage Fluid/Lubricant
Engine Oil
(Gasoline
Engine)Engine oil which meets GM Standard
GM6094M and displays the
American Petroleum Institute (API)
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
®/
Isuzu Diesel
Engines)Engine oils with the letters CJ-4 are
required for your vehicle. The CJ-4
designation can appear either alone
or in combination with other
American Petroleum Institute (API)
designations, such as API CJ-4/SL.
These letters show API 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
®/
Isuzu Diesel
Engines)50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant
(Caterpillar Diesel Engines) on
page 5-47.
Hydraulic Brake
SystemDelco
®Supreme 11 Brake Fluid or
equivalent DOT-3 brake fluid.
Windshield
Washer SolventOptikleen
®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
TransmissionSynthetic Manual Transmission Fluid
(GM Part No. U.S. 88861952,
in Canada 88861953).
Automatic
TransmissionSee the Allison Transmission
®
Operator’s Manual for correct
transmission fluid.
6-31

Child Restraints (cont.)
Securing a Child Restraint in the Center
Rear Seat Position...................................1-42
Securing a Child Restraint in the Right
Front Seat Position...................................1-44
Where to Put the Restraint...........................1-38
Chime Level Adjustment..................................3-58
Cigarette Lighter.............................................3-19
Cleaning
Aluminum or Chrome-Plated Wheels..............5-92
Exterior Lamps/Lenses.................................5-90
Fabric/Carpet..............................................5-88
Finish Care.................................................5-90
Instrument Panel, Vinyl, and Other
Plastic Surfaces.......................................5-89
Interior.......................................................5-87
Tires..........................................................5-92
Underbody Maintenance...............................5-93
Washing Your Vehicle...................................5-90
Weatherstrips..............................................5-89
Windshield and Wiper Blades........................5-91
Climate Control System...................................3-20
Outlet Adjustment........................................3-22
Rear Heating System...................................3-23
Clock, Setting.................................................3-48
Collision Damage Repair................................... 7-6
Control of a Vehicle.......................................... 4-3Coolant
Engine.......................................................5-47
Engine Temperature Gage............................3-34
Low Warning Light.......................................3-35
Surge Tank Pressure Cap.............................5-47
Cooling System..............................................5-43
Cruise Control................................................3-10
Customer Assistance Information
Customer Assistance for Text Telephone
(TTY) Users.............................................. 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-5
Reporting Safety Defects to General Motors........ 7-9
Reporting Safety Defects to the Canadian
Government.............................................. 7-9
Reporting Safety Defects to the
United States Government.......................... 7-9
Roadside Assistance Program......................... 7-5
Service Publications Ordering Information........7-10
D
Daytime Running Lamp...................................3-15
Daytime Running Lamps Indicator Light.............3-42
Defensive Driving............................................. 4-2
3

K
Keyless Entry System....................................... 2-3
Keys............................................................... 2-2
L
Lamp
Malfunction Indicator....................................3-36
Lamps
Dome ........................................................3-16
Marker.......................................................3-16
Reading.....................................................3-17
Lap Belt........................................................1-27
Lap-Shoulder Belt...........................................1-24
LATCH System for Child Restraints...................1-40
Light
Airbag Off..................................................3-28
Airbag Readiness........................................3-27
Antilock Brake System (ABS) Warning............3-33
Brake System Warning.................................3-31
Change Engine Oil......................................3-39
Change Fuel Filter Warning..........................3-45
Charging System.........................................3-29
Check Gages Warning.................................3-43
Daytime Running Lamps Indicator..................3-42
Diesel Particulate Filter Warning....................3-46
Differential Lock Indicator..............................3-41
Engine Overspeed Warning...........................3-40Light (cont.)
Engine Shutdown Warning............................3-40
Exhaust Brake Indicator................................3-41
Highbeam On.............................................3-42
Low Coolant Warning...................................3-35
Low Oil Level.............................................3-39
Low Washer Fluid Warning...........................3-43
Power Take-Off...........................................3-43
Range Inhibit Warning Indicator.....................3-31
Reduced Engine Power................................3-42
Safety Belt Reminders..................................3-26
Service Transmission Warning.......................3-30
Trailer Antilock Brake System Warning............3-34
Wait to Start Indicator..................................3-35
Water in Fuel Warning.................................
3-45
Lighting
Entry.........................................................3-17
Lights
Exterior Lamps............................................3-14
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-14
Loading Your Vehicle.......................................4-20
Locks
Door ........................................................... 2-6
Power Door .................................................. 2-7
Loss of Control...............................................4-12
Low Coolant Warning Light..............................3-35
Low Washer Fluid Warning Light.......................3-43
Lower Anchors and Tethers for Children.............1-40
7