2012 CHEVROLET IMPALA headlamp

Black plate (25,1)Chevrolet Impala Owner Manual - 2012
Vehicle Care 10-25
Headlamp Aiming
Headlamp aim has been preset at
the factory and should need no
further adjustment.
However, if the vehicle is damaged
in a crash, the headlamp aim may
be affected. Aim adjustment to the
low-beam headlamps may be
necessary if oncoming drivers flash
their high-beam headlamps at you
(for vertical aim).
If the headlamps need to be
re-aimed, it is recommended that
the vehicle be taken to the dealer
for service.
Bulb Replacement
For the proper type of replacement
bulbs, seeReplacement Bulbs on
page 10‑29.
For any bulb‐changing procedure
not listed in this section, contact
your dealer.
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.
Headlamps, Front Turn
Signal, Sidemarker, and
Parking Lamps
A. Sidemarker
B. Low-Beam Headlamp
C. High-Beam Headlamp
D. Parking/Turn Signal Lamp

Black plate (26,1)Chevrolet Impala Owner Manual - 2012
10-26 Vehicle Care
To replace one of these bulbs:
1. Open the hood. SeeHood on
page 10‑5.
2. Remove the screw from the headlamp assembly.
3. Pull up on the plastic headlampretainer and remove it.
4. Pull the headlamp assembly away from the vehicle and
remove the electrical connector.
5. Remove the round dust caps to gain access to the bulbs. 6. Turn the old bulb
counterclockwise and remove
it from the retaining ring by
pulling it away from the
headlamp.
7. Remove the electrical connector from the bulb by raising the lock
tab and pulling the connector
away from the bulb's base.
8. Install the electrical connector to the bulb.
9. Install the new bulb by inserting the smallest tab on the bulb
base into the matching notch in
the retaining ring. Turn the bulb
a quarter-turn clockwise until it
stops.
10. Reinstall the dust caps.

Black plate (27,1)Chevrolet Impala Owner Manual - 2012
Vehicle Care 10-27
11. Push the headlamp assemblytoward the vehicle.12. Push down on the plasticheadlamp retainer to reinstall it.13. Reinstall the screw from theheadlamp assembly.

Black plate (29,1)Chevrolet Impala Owner Manual - 2012
Vehicle Care 10-29
License Plate Lamp
To replace one of these bulbs:
1. Remove the two screws (A) fromthe license plate lamp assembly.
2. Pull the lamp assembly down and turn the bulb socket
counterclockwise and out of the
lamp assembly.
3. Pull the old bulb straight out of the socket.
4. Install the new bulb.
5. Reverse Steps 1 through 3 to reinstall the license plate lamp
assembly.
Replacement Bulbs
Exterior Lamp Bulb Number
Back-Up 921LL
Front Parking/Turn
Signal 3157NAK
License
Plate Lamp 194LL
Headlamps High-Beam H9
Low-Beam H11
Sidemarker 194LL
Stoplamp,
Taillamp, and Turn
Signal 3057
For replacement bulbs not listed
here, contact your dealer.
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.

Black plate (30,1)Chevrolet Impala Owner Manual - 2012
10-30 Vehicle Care
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.
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 fires caused by electrical
problems.
Look at the silver-colored band
inside the fuse. If the band is broken
or melted, replace the fuse. Be sure
you replace a bad fuse with a new
one of the identical size and rating.
Engine Compartment
Fuse Block
The engine compartment fuse block
is located on the passenger side of
the engine compartment, by the
battery. SeeEngine Compartment
Overview on page 10‑6 for more
information on location.
Notice: Spilling liquid on any
electrical component on the
vehicle may damage it. Always
keep the covers on any electrical
component.

Black plate (32,1)Chevrolet Impala Owner Manual - 2012
10-32 Vehicle Care
FusesUsage
CHMSL/
BCK‐UP Center
High‐Mounted
Stoplamp,
Back‐up Lamp
DISPLAY Display
DRL 1 Daytime Running
Lamps 1
DRL 2 Daytime Running
Lamps 2
ECM IGN Engine Control
Module (ECM),
Ignition
ECM/TCM ECM,
Transmission
Control
Module (TCM) Fuses
Usage
EMISSIONS 1 Emissions 1
EMISSIONS 2 Emissions 2
ETC/ECM Electronic
Throttle
Control, ECM
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
FOG LAMPS Fog Lamps
(If Equipped)
FSCM Fuel System
Control Module
HDLP MDL Headlamp
Module
HORN Horn
HTD MIR Heated Mirror Fuses
Usage
IGN 1 Ignition 1
INJ 2 Injector 2
INT LIGHTS Interior Lamps
INT LTS/
PNL DIM Interior Lamps,
Instrument Panel
Dimmer
LT HI BEAM Driver Side
High‐Beam
Headlamp
LT LO BEAM Driver Side
Low‐Beam
Headlamp
LT PARK Driver Side
Parking Lamp
LT SPOT Left Spot
LT T/SIG Driver Side Turn
Signal Lamp

Black plate (33,1)Chevrolet Impala Owner Manual - 2012
Vehicle Care 10-33
FusesUsage
ONSTAR OnStar
PWR DROP/
CRANK Power Drop,
Crank
RADIO Audio System
RT HI BEAM Passenger Side
High‐Beam
Headlamp
RT LO BEAM Passenger Side
Low‐Beam
Headlamp
RT PARK Passenger Side
Parking Lamp
RT SPOT Right Spot Fuses
Usage
RT T/SIG Passenger Side
Turn Signal Lamp
RVC SEN Regulated
Voltage Control
Sensor
STRG WHL Steering Wheel
STRTR Starter
TRANS Transmission
VAC/PUMP Vacuum Pump
WPR Wiper
WSW Windshield Wiper Relay
Usage
A/C
CMPRSR Air Conditioning
Compressor
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
FAN 3 Cooling Fan 3
VAC/PUMP Vacuum Pump
PWR/TRN Powertrain
REAR
DEFOG Rear Defogger
STRTR Starter

Black plate (53,1)Chevrolet Impala Owner Manual - 2012
Vehicle Care 10-53
Wheel Alignment and Tire
Balance
The tires and wheels were aligned
and balanced at the factory to
provide the longest tire life and best
overall performance. Adjustments to
wheel alignment and tire balancing
will not be necessary on a regular
basis. However, check the
alignment if there is unusual tire
wear or if the vehicle is pulling to
one side or the other. If the vehicle
vibrates when driving on a smooth
road, the tires and wheels might
need to be rebalanced. See your
dealer for proper diagnosis.
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.
Some aluminum wheels can be
repaired. See your dealer if any of
these conditions exist.Your dealer will know the kind of
wheel that is needed.
Each new wheel should have the
same load-carrying capacity,
diameter, width, offset, and be
mounted the same way as the one it
replaces.
Replace wheels, wheel bolts, wheel
nuts, or Tire Pressure Monitor
System (TPMS) sensors with new
GM 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
a crash. 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 If a Tire Goes Flat on
page 10‑54 for more information.
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.