Page 292 of 363
6-38 Headlamps
Before replacing a headlamp bulb that does not light,
check to make sure that the wiring connector is securely
fastened to it.
See ªReplacement Bulbsº in the Index to check the type
of headlamp bulb you need to use before you begin to
replace the headlamp bulb. You must replace a
headlamp bulb with one that is exactly the same.
To replace a headlamp, do the following:
1. Open the hood.
2. Locate the headlamp bulb that needs to be replaced.
3. Press and turn the base of the socket one-quarter turn
counterclockwise. (See arrows).
4. Remove the socket with the burned lamp.
5. Replace the bulb and insert the socket into the headlamp.
Page 304 of 363

6-50 Wheel Replacement
Replace any wheel that is bent, cracked, or badly rusted
or corroded. If wheel nuts keep coming loose, the wheel,
wheel bolts and wheel nuts should be replaced. If the
wheel leaks air, replace it (except some aluminum
wheels, which can sometimes be repaired).
See your dealer if any of these conditions exist.
Your dealer will know the kind of wheel you need.
Each new wheel should have the same load
-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts and wheel nuts for your vehicle.
CAUTION:
Using the wrong replacement wheels, wheel bolts
or wheel nuts on your vehicle can be dangerous.
It could affect the braking and handling of your
vehicle, make your tires lose air and make you
lose control. You could have a collision in which
you or others could be injured. Always use the
correct wheel, wheel bolts and wheel nuts
for replacement.
NOTICE:
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.
See ªChanging a Flat Tireº in the Index for
more information.
Page 316 of 363

6-62
Electrical System
Add-On Electrical Equipment
NOTICE:
Don't add anything electrical to your vehicle unless
you check with your dealer first. Some electrical
equipment can damage your vehicle and the
damage wouldn't be covered by your warranty.
Some add
-on electrical equipment can keep other
components from working as they should.
Your vehicle has an air bag system. Before attempting to
add anything electrical to your vehicle, see ªServicing
Your Air Bag
-Equipped Vehicleº in the Index.
Headlamps
The headlamp wiring is protected by a circuit breaker.
An electrical overload will cause the lamps to go on and
off, or in some cases to remain off. If this happens, have
your headlamp wiring checked right away.
Windshield Wipers
The windshield wiper motor is protected by a circuit
breaker and a fuse. If the motor overheats due to heavy
snow, etc., the wiper will stop until the motor cools. If
the overload is caused by some electrical problem and
not snow or ice, etc., be sure to get it fixed.
Power Windows and Other Power Options
Circuit breakers protect the power windows and other
power accessories. When the current load is too heavy,
the circuit breaker opens and closes, protecting the
circuit until the problem is fixed or goes away.
Page 318 of 363
6-64
Main Fuse Block
Fuse Usage
STOP/HAZARD Hazard Flashers, Brake
Switch Assembly
TURN B/U Traction Control/Second
-Gear
Start Switch, Back
-Up Lamp
Switch, Turn Flasher, Daytime
Running Lamps (DRL) ModuleFuse Usage
STG
WHL CNTRLSteering Wheel Controls
RADIO ACCY Delco Monsoon Radio Amplifier,
Remote CD Player (Trunk)
TAIL LPS Daytime Running Lamps (DRL)
Module, Headlamp Switch
HVAC HVAC Selector Switch,
Rear Defogger Switch/Timer
PWR ACCY Parking Lamp Relay, Hatch
Release Relay, Power Mirror
Switch, Radio, Shock Sensor,
Instrument Cluster
COURTESY Body Control Module (BCM)
GAUGES Body Control Module (BCM),
Brake
-Transmission Shift
Interlock (BTSI), Instrument
Cluster, Daytime Running
Lamps (DRL) Module
AIR BAG Air Bag System
Page 319 of 363
6-65
Fuse Usage
CIG/ACCY Cigarette Lighter, Data Link
Connector (DLC)
DEFOG/SEATS Rear Defogger Switch/Timer,
Power Seats
IGN Aftermarket Use Only
STG
WHL CNTRLSteering Wheel
Controls Illumination
WIPER/WASH Wiper Motor Assembly,
Wiper/Washer Switch
BATT Aftermarket Use Only
WINDOWS Power Windows Switch (RH, LH),
Express
-Down Module,
Convertible Top SwitchFuse Usage
IP DIMMER Door Illumination Lamp (LH, RH),
Headlamp Switch, Fog Lamp
Switch, Instrument Cluster, HVAC
Control Assembly, PRNDL
Illumination Lamp, Ashtray Lamp,
Radio, Rear Window Defogger
Switch/Timer, Traction Control
(ASR)/Second
-Gear Start Switch,
Convertible Top Switch
ACCY Aftermarket Use Only
RADIO Body Control Module (BCM),
Radio, Amplifier, Steering Wheel
Controls
-Radio
Page 320 of 363
6-66
Underhood Electrical Center
Fuse and Relay Center 1
Fuse Usage
ABS BAT SOL Anti
-Lock Brake System
TCS BAT Traction Control System (ASR)
and ETC
COOL FAN Cooling Fan Control
PCM BAT Powertrain Control
Module (PCM)Fuse Usage
FUEL PUMP Fuel Pump
AIR PUMP Air Pump Relay and Bleed Valve
LH HDLP DR Left Headlamp Door and Module
RH HDLP DR Right Headlamp Door and Module
HORN Horn Relay
ABS BAT
-1 Anti-Lock Brake System Module
H/L DR HORN Horn and Headlamp Doors
ABS BAT
-2 Anti-Lock Brake and Traction
Control System (ASR)
COOL FAN Cooling Fan Relays
Relay Description
FOG LAMP Fog Lamps
HORN Horn
FAN #3 Cooling Fans
FAN #2 Cooling Fans
FAN #1 Cooling Fans
Page 322 of 363
6-68
Relay Description
Blank Not Used
AIR PUMP Air Pump
A/C COMP Air Conditioning Compressor
FUEL PUMP Fuel Pump
STARTER Starter
IGN Engine Controls, Cruise Control,
Air ConditioningReplacement Bulbs
Back-Up3155 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Center High
-Mounted Stoplamp921 . . . . . . . . . . .
Front Parking and Turn Signal3157 K . . . . . . . . .
Headlamps
Low Beam 9006. . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Beam 9005. . . . . . . . . . . . . . . . . . . . . . . . . . .
Sidemarker Lamps194 . . . . . . . . . . . . . . . . . . . . . .
Taillamps Only194 . . . . . . . . . . . . . . . . . . . . . . . . . .
Tail/Stop/Turn Lamps3057 . . . . . . . . . . . . . . . . . . .