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264 Vehicle Care
Headlamp Aiming
Front Headlamp Aiming
Headlamp aim has been preset and should
need no further adjustment.
If the vehicle is damaged in a crash, the
headlamp aim may be affected.
If adjustment to the headlamps is necessary,
see your dealer.
Bulb Replacement
For the proper type of replacement bulbs,
or any bulb changing procedure not listed in
this section, contact your dealer.
Caution
Do not replace incandescent bulbs with
aftermarket LED replacement bulbs. This
can cause damage to the vehicle electrical
system.
Halogen Bulbs
{Warning
Halogen bulbs have pressurized gas inside
and can burst if you drop or scratch the
bulb. You or others could be injured. Be
sure to read and follow the instructions
on the bulb package.
High Intensity Discharge (HID)
Lighting
{Warning
The High Intensity Discharge (HID)
lighting system operates at a very high
voltage. If you try to 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 has been
replaced, the beam might be a slightly
different shade than it was originally. This is
normal.
LED Lighting
This vehicle has several LED lamps. For
replacement of any LED lighting assembly,
contact your dealer.
Back-Up Lamps
For the base and the uplevel taillamp
assembly, only the back-up bulb is
replaceable. Removal of the taillamp
assembly is not necessary to change
this bulb.
To replace one of these bulbs: 1. Open the trunk. See Trunk018.
2. Remove the three pushpin fasteners and cover.
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3. Turn the bulb socket counterclockwise toremove it.
4. Pull the old bulb straight out of the bulb socket.
5. Push the new bulb straight into the bulb socket until it clicks.
6. Turn the bulb socket clockwise to reinstall.
7. Install the three pushpin fasteners and cover.
License Plate Lamp
To replace one of these bulbs:
1. Unclip the license plate lamp from thefascia opening. 2. Pull the license plate lamp down through
the fascia opening.
3. Turn the bulb socket counterclockwise and pull the bulb straight out of the
lamp socket.
4. Install the new bulb.
5. Push the bulb straight into the socket and turn clockwise to reinstall.
6. Reinstall the license plate lamp by lifting it through the fascia opening until the
clip is in place.
Electrical System
Electrical System Overload
The vehicle has fuses and circuit breakers to
protect against an electrical system
overload.
When the current electrical load is too
heavy, the circuit breaker opens and closes,
protecting the circuit until the current load
returns to normal or the problem is fixed.
This greatly reduces the chance of circuit
overload and fire caused by electrical
problems.
Fuses and circuit breakers protect power
devices in the vehicle. Replace a bad fuse with a new one of the
identical size and rating.
If there is a problem on the road and a fuse
needs to be replaced, the same amperage
fuse can be borrowed. Choose some feature
of the vehicle that is not needed to use and
replace it as soon as possible.
Headlamp Wiring
An electrical overload may cause the lamps
to go on and off, or in some cases to
remain off. Have the headlamp wiring
checked right away if the lamps go on and
off or remain off.
Windshield Wipers
If the wiper motor overheats due to heavy
snow or ice, the windshield wipers will stop
until the motor cools and will then restart.
Although the circuit is protected from
electrical overload, overload due to heavy
snow or ice may cause wiper linkage
damage. Always clear ice and heavy snow
from the windshield before using the
windshield wipers.
If the overload is caused by an electrical
problem and not snow or ice, be sure to get
it fixed.
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266 Vehicle Care
Fuses and Circuit Breakers
The wiring circuits in the vehicle are
protected from short circuits by a
combination of fuses and circuit breakers.
This greatly reduces the chance of damage
caused by electrical problems.
To check a fuse, look at the silver-colored
band inside the fuse. If the band is broken
or melted, replace the fuse. Be sure to
replace a bad fuse with a new one of the
identical size and rating.
{Danger
Fuses and circuit breakers are marked
with their ampere rating. Do not exceed
the specified amperage rating when
replacing fuses and circuit breakers. Use
of an oversized fuse or circuit breaker can
result in a vehicle fire. You and others
could be seriously injured or killed.Fuses of the same amperage can be
temporarily borrowed from another fuse
location, if a fuse goes out. Replace the fuse
as soon as possible.
To identify and check fuses, circuit breakers,
and relays, see
Engine Compartment Fuse
Block 0266 and
Rear Compartment Fuse Block 0270.
Engine Compartment Fuse Block
To remove the hinged fuse block cover,
press the clip at the front of the cover, and
swing it up.
Caution
Do not pull the engine compartment fuse
block lever, since it is intended only for
service purposes. If pulled, vehicle
malfunction may occur.
Caution
Spilling liquid on any electrical
component on the vehicle may damage
it. Always keep the covers on any
electrical component.
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The vehicle may not be equipped with all of
the fuses, relays, and features shown.Fuses Usage
F1 ABS pump
F2 –
F3 Driver power seat
F4 Cooling fan F5 Passenger power seat
F6 –
F7 –
F8 –
F9 –
F10 –
F11 AUX DRL
F12 Front wiper
F13 Starter
F14 Brake vacuum pump
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Fuses UsageF15 Automatic headlamp leveling
module
F16 Front heated seat F17 Passenger window
F18 Body control module 4
F19 SDM/AOS
F20 OnStar/Navigation F21 Body control module 6
F22 ABS valve
F23 –
F24 –
F25 Electric steering column lock
F26 Body control module 2
F27 –
F28 Body control module 3 Fuses Usage
F29 Body control module 8
F30 Windshield wiper F31 Right HID headlamp
F32 Left HID headlamp
F33 –
F34 Horn F35 Automatic headlamp leveling
motor
F36 Left high-beam headlamp
F37 Right high-beam headlamp
F38 –
F39 –
F40 Rear electrical center/Ignition
F41 Malfunction indicator lamp/
Ignition Fuses Usage
F42 HVAC/ISRVM/ OSRVM
F43 Front exhaust valve active fuel
management
F44 –
F45 Sunroof
F46 Body control module 7
F47 CGM
F48 A/C clutch
F49 Heated steering wheel
F50 Fuel system control module/
Ignition
F51 Rear exhaust valve PTSQ
F52 –
F53 –
F54 Engine coolant pump
F55 Fuel prime
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Fuses UsageF56 –
F57 Engine control module/Ignition
F58 Transmission control module/
Ignition
F59 –
F60 Transmission control module
battery
F61 Non-walk/Vehicle
F62 Ignition coils –odd
F63 Non-walk/O2 sensor
F64 Ignition coils –even
F65 –
F66 Engine control module 1 Fuses Usage
F67 Engine control module 2
F68 Spare
F69 Spare F70 Spare F71 Spare
F72 Spare
F73 Spare
F74 Spare F75 Spare
F76 Spare F77 Spare
Relays Usage
K1 –
K2 Run/Crank
K3 –
K4 Vacuum pump K5 A/C control Relays
Usage
K6 Coolant pump K7 Engine control module
K8 Fuel prime
K9 –
K10 Starter
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270 Vehicle Care
Rear Compartment Fuse Block
The rear compartment fuse block is on the
right side under the trunk load floor.
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The vehicle may not be equipped with all of
the fuses, relays, and features shown.Fuses Usage
F1 Rear window defogger
F2 Front blower
F3 Electric parking brake
F4 –
F5 –
F6 Rear drive control module
F7 Right window
F8 –
F9 Left window
F10 Heated mirror F11 –
F12 Heated steering wheel
F13 –
F14 HVAC control F15 Spare
F16 Display Fuses Usage
F17 Spare
F18 –
F19 Front ventilated seat
F20 Spare F21 –
F22 –
F23 Body control module
F24 –
F25 –
F26 –
F27 RGB lights
F28 Passive entry/ Passive start
battery
F29 Data link connector
F30 Canister vent F31 Power fold top
F32 Memory seat module Fuses Usage
F33 Wireless charger
F34 Engine control module battery
F35 Fuel system control module V6
F36 –
F37 Electric steering column lock
F38 Outside rear view mirror/Power
window
F39 Rear closure
F40 –
F41 Battery regulated voltage control
F42 SADS
F43 Rear drive control module/ICCM
F44 Folding top solenoid
F45 Amplifier
F46 Fuel system control module V8