2002 CHEVROLET AVALANCHE turn signal bulb

2-48
Turn Signal and Lane Change Signals
The turn signal has two upward (for right) and two
downward (for left) positions. These positions allow
you to signal a turn or a lane change.
To signal a turn, move the lever all the way up
or down. When the turn is finished, the lever
will return automatically.
An arrow on the instrument
panel cluster will flash in
the direction of the turn
or lane change.
To signal a lane change, just raise or lower the lever
until the arrow starts to flash. Hold it there until you
complete your lane change. The lever will return by
itself when you release it.
If you move the lever all the way up or down, and the
arrow flashes at twice the normal rate, a signal bulb
may be burned out and other drivers may not see your
turn signal.If a bulb is burned out, replace it to help avoid an
accident. If the arrows don't go on at all when you
signal a turn, check for burned
-out bulbs or a blown
fuse (see ªFuses and Circuit Breakersº in the Index).
Turn Signal On Chime
If your turn signal is left on for more than 3/4 of a mile
(1.2 km), a chime will sound at each flash of the turn
signal. To turn off the chime, move the turn signal
lever to off.
Headlamp High/Low Beam Changer
To change the headlamps from low to high beam or
high to low beam, pull the multifunction lever all the
way toward you. Then release it.
When the high beams
are on, this light on the
instrument panel cluster
also will be on.

4-68 Turn Signals When Towing a Trailer
The arrows on your instrument panel will flash
whenever you signal a turn or lane change. Properly
hooked up, the trailer lamps will also flash, telling other
drivers you're about to turn, change lanes or stop.
When towing a trailer, the arrows on your instrument
panel will flash for turns even if the bulbs on the trailer
are burned out. Thus, you may think drivers behind you
are seeing your signal when they are not. It's important
to check occasionally to be sure the trailer bulbs are
still working.
Driving On Grades
Reduce speed and shift to a lower gear before you start
down a long or steep downgrade. If you don't shift
down, you might have to use your brakes so much
that they would get hot and no longer work well.
You can tow in DRIVE (D). You may want to shift the
transmission to THIRD (3) or, if necessary, a lower gear
selection if the transmission shifts too often (e.g., under
heavy loads and/or hilly conditions).
You may also want to activate the tow/haul mode if the
transmission shifts too often. See ªTow/Haul Modeº
in the Index.
When towing at high altitude on steep uphill grades,
consider the following: Engine coolant will boil at a
lower temperature than at normal altitudes. If you turn
your engine off immediately after towing at high altitude
on steep uphill grades, your vehicle may show signs
similar to engine overheating. To avoid this, let the
engine run while parked (preferably on level ground)
with the automatic transmission in PARK (P) for a
few minutes before turning the engine off. If you do
get the overheat warning, see ªEngine Overheatingº
in the Index.

6-38
Bulb Replacement
See ªReplacement Bulbsº in the Index for the proper
type of bulbs to use.
For any bulb changing procedure not listed in this
section, contact your dealer.
Halogen Bulbs
CAUTION:
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
1. Remove the turn
signal/parking lamp
housing by pressing
the release clip on the
outboard side of the
housing and pulling
the outboard end of the
housing toward you.
2. Pull the inboard side of the housing out from
the vehicle.

6-40
7. Plug in the electrical connector to the new bulb.
Use care not to touch the new bulb with your bare
hands or anything damp or oily.
8. Place the connector with the new bulb into the
headlamp housing and turn it clockwise until
it is tight.
9. Put the headlamp assembly back into the vehicle
and reinstall the two pins.
10. Place the inboard end of the turn signal/parking
lamp housing into the pocket.
11. Push the outboard side of the housing in until
the release clip snaps into place.Front Turn Signal/Parking Lamp and
Sidemarker Lamps
A. Sidemarker Lamp
B. Front Turn Signal/Parking Lamp

6-41
1. Remove the turn
signal/parking lamp
housing by pressing
the release clip on the
outboard side of the
housing and pulling
the outboard end of the
housing toward you.
2. Pull the inboard side of the housing out from
the vehicle.
3. Press the locking release lever (the sidemarker lamp
does not have a locking release lever), turn the bulb
socket counterclockwise and remove it from the turn
signal/parking lamp housing.
4. Remove the old bulb from the bulb socket.
5. Put the new bulb into the bulb socket.
6. Put the bulb socket into the turn signal housing and
turn it clockwise until it locks (the sidemarker lamp
does not lock into place).
7. Place the inboard end of the turn signal/parking lamp
housing into the pocket.
8. Push the outboard side of the housing in until the
release clip snaps into place.Daytime Running Lamps (DRLs)
The DRLs are located in the front facia near the
foglamps. They can be identified by their square shape.
1. Reach under the front
facia and locate the DRL
housing. Be sure you are
not picking the foglamp
housing, which is near
the DRLs.
2. Turn the bulb socket counterclockwise and remove it
from the DRL housing.
3. Pull out the old bulb from the socket and put a
new bulb in.
4. Place the bulb socket back into the DRL housing
and turn it clockwise until it is tight.
Center High Mounted Stoplamp (CHMSL)
It is recommended that this component be replaced as a
unit by your dealer.

6-42 Taillamps
A. Stoplamp
B. Turn Signal Lamp
C. Back
-up Lamp
1. Open the tailgate.
2. Remove the two
rear lamp assembly
screws near the tailgate
latch and pull out the
lamp assembly.
3. Press the release tab
and turn the bulb
socket counterclockwise
to remove it from the
taillamp housing.
4. Pull the old bulb straight out from the socket.
5. Press a new bulb into the socket and turn the socket
clockwise into the taillamp housing until it clicks.
6. Reinstall the rear lamp assembly and tighten the screws.
7. Close the tailgate.

6-71
Name Usage
BTSI Automatic Transmission Shift
Lock Control System
LT TURN Left Turn Signals
FR PRK Front Parking Lamps,
Sidemarker Lamps
W/W PMP Windshield Washer Pump
HORN Horn (Relay)
IGN C Ignition Switch, Fuel Pump,
PRND321 Display, Crank
RDO AMP Radio Amplifier
HAZ LP Exterior Lamps, Hazard Lamps
EXP LPS Not Used
HORN Horn
CTSY LP Interior Lamps
RR WPR Not Used
TBC Body Control Module, Remote
Keyless Entry, HeadlampsReplacement Bulbs*
Low-Beam Headlamps 9006
High
-Beam Headlamps 9011
Daytime Running Lamps (DRL) 4157K
Front Marker Lamp 194
Front Parking and Turn Lamp 3157A or
3457NA
Rear Marker Lamp, Taillamp
and Stop Lamp3157
Rear Turn Lamp 3157
Back
-up Lamp 3157
* For replacement bulbs not listed here, please contact
your dealer.