Page 567 of 616

Additional Required Services
At Each Fuel Stop
.Engine oil level check. SeeEngine Oilonpage 7!17.
.Engine coolant level check. SeeEngine Coolanton page 7!29.
.Windshield washer fluid level check. SeeWindshield Washer Fluid on page 7!39.
Once a Month
.Tire inflation check. SeeInflation - Tire Pressureon page 7!65.
.Tire wear inspection. SeeTire Inspection andRotation on page 7!71.
Once a Year
.Starter switch check. SeeOwner Checks andServices on page 8!8.
.Parking brake and automatic transmission P (Park)mechanism check. SeeOwner Checks andServices on page 8!8.
.Automatic transmission shiftlock control systemcheck. SeeOwner Checks and Servicesonp a g e 8!8.
.Ignition transmission lock check. SeeOwnerChecks and Services on page 8!8.
.Engine cooling system and pressure cap pressurecheck. Radiator and air conditioning condenseroutside cleaning. SeeCooling Systemonpage 7!28.
.Exhaust system and nearby heat shieldsinspection for loose or damaged components.
.Accelerator pedal check for damage, high effort,or binding. Replace if needed.
.Hood and liftgate support gas strut inspection forsigns of wear, corrosion, cracks, loss of lubricant,or other damage. Check the hold open ability ofthe gas strut. If necessary, replace with genuineparts from your dealer/retailer.
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Page 568 of 616

First Engine Oil Change After Every
40 000 km/25,000 Miles
.Fuel system inspection for damage or leaks.
First Engine Oil Change After Every
80 000 km/50,000 Miles
.Engine air cleaner filter replacement. SeeEngineAir Cleaner/Filter on page 7!22.
.Automatic transmission fluid and filter change(severe service) for vehicles mainly driven in heavycity traffic in hot weather, in hilly or mountainousterrain, when frequently towing a trailer, or used fortaxi, police, or delivery service. SeeAutomaticTransmission Fluid on page 7!24.
.Four!wheel drive only: Transfer case fluid change(severe service) for vehicles mainly driven whenfrequently towing a trailer, or used for taxi, police,or delivery service. Check vent hose at transfercase for kinks and proper installation. Check to besure vent hose is unobstructed, clear, and free of
debris. During any maintenance, if a power washeris used to clean mud and dirt from the underbody,care should be taken to not directly spray thetransfer case output seals. High pressure watercan overcome the seals and contaminate thetransfer case fluid. Contaminated fluid willdecrease the life of the transfer case and shouldbe replaced.
.Evaporative control system inspection. Check allfuel 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 asneeded.An Emission Control Service. The U.S.Environmental Protection Agency or the CaliforniaAir Resources Board has determined that thefailure to perform this maintenance item will notnullify the emission warranty or limit recall liabilityprior to the completion of the vehicle's useful life.We, however, urge that all recommendedmaintenance services be performed at theindicated intervals and the maintenance berecorded.
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Page 569 of 616

First Engine Oil Change After Every
160 000 km/100,000 Miles
.Automatic transmission fluid and filter change(normal service). SeeAutomatic TransmissionFluid on page 7!24.
.Four!wheel drive only: Transfer case fluid change(normal service). Check vent hose at transfer casefor kinks and proper installation. Check to be surevent hose is unobstructed, clear, and free ofdebris. During any maintenance, if a power washeris used to clean mud and dirt from the underbody,care should be taken to not directly spray thetransfer case output seals. High pressure watercan overcome the seals and contaminate thetransfer case fluid. Contaminated fluid willdecrease the life of the transfer case and shouldbe replaced.
.Spark plug replacement and spark plug wiresinspection.An Emission Control Service.
First Engine Oil Change After Every
240 000 km/150,000 Miles
.Engine cooling system drain, flush, and refill,cooling system and cap pressure check, andcleaning of outside of radiator and air conditioningcondenser (or every 5 years, whichever occursfirst). SeeEngine Coolanton page 7!29.AnEmission Control Service.
.Engine accessory drive belt inspection for fraying,excessive cracks, or obvious damage andreplacement, if needed.An Emission ControlService.
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Page 570 of 616

Owner Checks and Services
Starter Switch Check
{WARNING:
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 enoughroom around the vehicle.
2. Firmly apply both the parking brake and the regularbrake. SeeParking Brake on page 3!38.
Do not use the accelerator pedal, and be ready toturn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicleshould start only in P (Park) or N (Neutral). If thevehicle starts in any other position, contact yourdealer/retailer for service.
Automatic Transmission Shift Lock
Control System Check
{WARNING:
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 enoughroom around the vehicle. It should be parked on alevel surface.
2. Firmly apply the parking brake. SeeParking Brakeon page 3!38.
Be ready to apply the regular brake immediately ifthe vehicle begins to move.
3. With the engine off, turn the ignition to ON/RUN,but do not start the engine. Without applying theregular brake, try to move the shift lever out ofP (Park) with normal effort. If the shift lever movesout of P (Park), contact your dealer/retailer forservice.
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Page 571 of 616

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turnthe ignition to LOCK/OFF in each shift lever position.
.The ignition should turn to LOCK/OFF only whenthe shift lever is in P (Park).
.The ignition key should come out only inLOCK/OFF.
Contact your dealer/retailer if service is required.
Parking Brake and Automatic
Transmission P (Park) Mechanism
Check
{WARNING:
When you are doing this check, the vehicle could
begin to move. You or others could be injured and
property could be damaged. Make sure there is
room in front of the vehicle in case it begins to
roll. Be ready to apply the regular brake at once
should the vehicle begin to move.
Park on a fairly steep hill, with the vehicle facingdownhill. Keeping your foot on the regular brake, set theparking brake.
.To check the parking brake's holding ability: Withthe engine running and the transmission inN (Neutral), slowly remove foot pressure from theregular brake pedal. Do this until the vehicle is heldby the parking brake only.
.To check the P (Park) mechanism's holding ability:With the engine running, shift to P (Park). Thenrelease the parking brake followed by the regularbrake.
Contact your dealer/retailer if service is required.
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Page 572 of 616

Recommended Fluids and
Lubricants
Fluids and lubricants identified below by name, partnumber, or specification can be obtained from yourdealer/retailer.
UsageFluid/Lubricant
Engine Oil
The engine requires a special engineoil meeting GM Standard GM4718M.Oils meeting this standard can beidentified as synthetic, and shouldalso be identified with the AmericanPetroleum Institute (API) Certified forGasoline Engines starburst symbol.However, not all synthetic API oilswith the starburst symbol will meetthis GM standard. Look for and useonly oil that meets GM StandardGM4718M. For the proper viscosity,seeEngine Oil on page 7!17.
UsageFluid/Lubricant
Engine Coolant
50/50 mixture of clean, drinkablewater and use only DEX-COOL®
Coolant. SeeEngine Coolantonp a g e 7!29.
Hydraulic BrakeSystem
DOT 3 Hydraulic Brake Fluid(GM Part No. U.S. 12377967, inCanada 89021320).
WindshieldWasherOptikleen®Washer Solvent.
Power SteeringSystem
GM Power Steering Fluid(GM Part No. U.S. 89021184, inCanada 89021186).
AutomaticTransmissionDEXRON®-VI Automatic TransmissionFluid.
Key LockCylinders
Multi-Purpose Lubricant, Superlube(GM Part No. U.S. 12346241, inCanada 10953474).
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Page 574 of 616
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can be obtained from your dealer/retailer.
Maintenance Replacement Parts
PartGM Part Number ACDelco Part Number
Engine Air Cleaner/Filter15908916A3086C
Oil Filter89017524PF48
Spark Plugs1262125841-110
Wiper Blades
Front–21.6 in (55.0 cm)25877402—
Rear–11.8 in (30.0 cm)25820122—
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Page 575 of 616
Engine Drive Belt Routing
If your vehicle is a Two-mode Hybrid, see theTwo-mode Hybrid manual for more information.
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