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Bulb Replacement
For the proper type of replacementbulbs, seeReplacement Bulbs0294.
For any bulb changing procedurenot listed in this section, see yourdealer.
Atoolisincludedwiththevehicletoassist with bulb replacement by yourdealer.
High Intensity Discharge
(HID) Lighting
{Warning
The High Intensity Discharge
(HID) lighting system operates at
averyhighvoltage.Ifyoutryto
service any of the system
components, you could be
seriously injured. Have your
dealer or a qualified technician
service them.
After an HID headlamp bulb hasbeen replaced, the beam might be aslightly different shade than it wasoriginally. This is normal.
License Plate Lamp
Lamp Assembly
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Headlamp Wiring
An electrical overload may causethe lamps to go on and off, or insome cases to remain off. Have theheadlamp wiring checked right awayif the lamps go on and off orremain off.
Windshield Wipers
If the wiper motor overheats due toheavy snow or ice, the windshieldwipers will stop until the motor coolsand will then restart.
Although the circuit is protectedfrom electrical overload, overloaddue to heavy snow or ice maycause wiper linkage damage.Always clear ice and heavy snowfrom the windshield before using thewindshield wipers.
If the overload is caused by anelectrical problem and not snow orice, be sure to get it fixed.
Fuses
The wiring circuits in the vehicle areprotected from short circuits byfuses. This greatly reduces thechance of fires caused by electricalproblems.
Look at the silver-colored bandinside the fuse. If the band is brokenor melted, replace the fuse. Be sureyou replace a bad fuse with a newone of the identical size and rating.
Fuses of the same amperage canbe temporarily borrowed fromanother fuse location, if a fuse goesout. Replace the fuse as soon asyou can.
Spare fuses of various ratings areprovided in the EngineCompartment Fuse Block and RearCompartment Fuse Block.
Engine Compartment
Fuse Block
To a c c e s s t h e f u s e b l o c k , r e m o v ethe clip-on cover.
Ensure the cover is replacedsecurely.
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296 Vehicle Care
The vehicle may not be equippedwith all of the fuses, relays, andfeatures shown.
Fuses Usage
F1 Heated mirrors
F2–
Fuses Usage
F3 Rear defogger
F4–
F5 Right spotlamp
F6 Driver power seat
F7 Washer pump
F8 Passenger power seat
F9 Emergency vehiclefront lamp
F10–
F11 Driving lamps
F12 Headlamp washer
F13 Left spotlamp
F14 ABS pump
F15 ABS valves
F16–
F17–
F18 Heated front seats
F19–
F20–
F21 Front passengerwindow switch
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FusesUsage
F22 Rear wiper
F23 Sunroof
F24 Front wipers
F25 Automatic occupantsensing/Instrumentcluster/Ignition
F26 Left rear bus electricalcenter/Ignition
F27–
F28 Ignition/Injectors even–V8
F29 Engine control module–V8/Ignition odd–V6/Emissions
F30–
F31–
F32–
F33 Ignition/Instrumentpanel body
F34 Fuel system controlmodule/Ignition
F35–
FusesUsage
F36 Electric steeringcolumn lock
F37 Emission 2/Ignitioneven–V6
F38 Engine control module–V6/Injectors/Ignitionodd–V8
F39 Intercooler pump
F40–
F41 Transmission controlmodule/Electric powersteering
F42 Starter motor
F43–
F44 Left HID headlamp
F45 Right HID headlamp
F46 High-beamheadlamps
F47 Horn
F48 Engine cooling fan
F49 Automatic headlampleveling
FusesUsage
F50 Transmission controlmodule ignition
F51 Engine control moduleignition
F52 Brake vacuum pump
F53 A/C clutch
F54 Vaporizer controlmodule
RelaysUsage
R1 Driving lamps
R2 Headlamp washer
R3 Rear washer pump
R4 Front washer pump
R5 Rear defogger
R6 Front wiper control
R7 Wiper speed
R8 Engine control module
R9–
R10 Intercooler pump
R11–
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RelaysUsage
R12 Rear wiper control
R13 Fog lamps
R14 Low-beam headlamps
R15 High-beamheadlamps
R16 Starter
R17 Run/Crank
R18 Brake vacuum pump
R19 A/C control
R20 Horn
Relays R3, R4, R12, R13, and R20are PCB mounted relays.
Instrument Panel Fuse
Block
Removing the Fuse Panel Cover
Insert a screwdriver in the slotindicated and remove the fuse panelcover.
Refitting the Fuse Panel Cover
1. Insert the rear edge of the fusepanel cover under thedoor seal.
2. Put the hooks on the cover intothe end of the instrumentpanel.
3. Rotate and push the coverback into position.
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The vehicle may not be equippedwith all of the fuses, relays andfeatures shown.
Fuses Usage
F1 Driver side windows
Fuses Usage
F2 Emergency vehicleaccessory
F3 Trunk release
F4 Passive entry passivestart/Battery 2
F5 Radio
F6–
F7–
F8 Fuel system controlmodule
F9 Magnetic real timedampening
F10 Decklid flashinglamps/EDI module
F11 Auxiliary battery
F12–
F13–
F14 Rear seatentertainment
F15 Automatic headlampleveling
F16–
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Some aluminum wheels can berepaired. See your dealer if any ofthese conditions exist.
Yo u r d e a l e r w i l l k n o w t h e k i n d o fwheel that is needed.
Each new wheel should have thesame load-carrying capacity,diameter, width, offset, and bemounted the same way as the one itreplaces.
Replace wheels, wheel bolts, wheelnuts, or Tire Pressure MonitorSystem (TPMS) sensors with newGM original equipment parts.
{Warning
Using the wrong replacement
wheels, wheel bolts, or wheel
nuts can be dangerous. It could
affect the braking and handling of
the vehicle. Tires can lose air,
and cause loss of control, causing
acrash.Alwaysusethecorrect
wheel, wheel bolts, and wheel
nuts for replacement.
Caution
The wrong wheel can also cause
problems with bearing life, brake
cooling, speedometer or
odometer calibration, headlamp
aim, bumper height, vehicle
ground clearance, and tire or tire
chain clearance to the body and
chassis.
Used Replacement Wheels
{Warning
Replacing a wheel with a used
one is dangerous. How it has
been used or how far it has been
driven may be unknown. It could
fail suddenly and cause a crash.
When replacing wheels, use a
new GM original equipment
wheel.
Tire Chains
{Warning
Do not use tire chains. There is
not enough clearance. Tire chains
used on a vehicle without the
proper amount of clearance can
cause damage to the brakes,
suspension, or other vehicle
parts. The area damaged by the
tire chains could cause loss of
control and a crash. Use another
type of traction device only if its
manufacturer recommends it for
the vehicle's tire size combination
and road conditions. Follow that
manufacturer's instructions. To
avoid vehicle damage, drive
slowly and readjust or remove the
traction device if it contacts the
vehicle. Do not spin the wheels.
If traction devices are used, install
them on the rear tires.
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356 Service and Maintenance
.To a v o i d b r e a k - d o w n o r f a i l u r e t ostart the vehicle, maintain abattery with full cranking power.
.Trained dealer technicians havethe diagnostic equipment to testthe battery and ensure that theconnections and cables arecorrosion-free.
Belts
.Belts may need replacing if theysqueak or show signs ofcracking or splitting.
.Trained dealer technicians haveaccess to tools and equipmentto inspect the belts andrecommend adjustment orreplacement when necessary.
Brakes
Brakes stop the vehicle and arecrucial to safe driving.
.Signs of brake wear may includechirping, grinding, or squealingnoises, or difficulty stopping.
.Trained dealer technicians haveaccess to tools and equipmentto inspect the brakes andrecommend quality partsengineered for the vehicle.
Fluids
Proper fluid levels and approvedfluids protect the vehicle’ssystemsand components. SeeRecommended Fluids andLubricants0358for GM approvedfluids.
.Engine oil and windshieldwasher fluid levels should bechecked at every fuel fill.
.Instrument cluster lights maycome on to indicate that fluidsmay be low and need to befilled.
Hoses
Hoses transport fluids and shouldbe regularly inspected to ensurethat there are no cracks or leaks.With a multi-point inspection, yourdealer can inspect the hoses andadvise if replacement is needed.
Lamps
Properly working headlamps,taillamps, and brake lamps areimportant to see and be seen onthe road.
.Signs that the headlamps needattention include dimming, failureto light, cracking, or damage.The brake lamps need to bechecked periodically to ensurethat they light when braking.
.With a multi-point inspection,your dealer can check the lampsand note any concerns.
Shocks and Struts
Shocks and struts help aid in controlfor a smoother ride.
.Signs of wear may includesteering wheel vibration, bounce/sway while braking, longerstopping distance, or uneventire wear.
.As part of the multi-pointinspection, trained dealertechnicians can visually inspectthe shocks and struts for signs