2003 CHEVROLET AVALANCHE Owners Manual

Bulb Replacement
SeeReplacement Bulbs on page 5-59for 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
Vehicles with Gray Body-Side Cladding
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.
5-52

3. Pull the pins away from their clips and pull them up
until they completely release from the vehicle.
4. Pull the headlamp assembly out of the vehicle.A. Low-Beam Headlamp
B. High-Beam Headlamp
5. Turn the bulb connector counterclockwise and pull it
out of the housing.
6. Unplug the electrical connector from the old bulb.
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.
5-53

Vehicles with no Body±Side Cladding
1. Remove the pin on the headlamp assembly by
turning the pin up and pulling it straight out.
2. Pull the headlamp assembly out.A. Low-Beam Headlamp
B. High-Beam Headlamp
3. Unplug the electrical connector.
4. Turn the old bulb counterclockwise and remove it
from the headlamp assembly.
5. Put the new bulb into the assembly and turn it
clockwise until it is tight. Use care not to touch
the bulb with your ®ngers or hands.
6. Plug in the electrical connector.
7. Put the headlamp assembly back into the vehicle.
Install the pin and turn it into the locking feature.
5-54

Front Turn Signal, Sidemarker and
Parking Lamps
Vehicles with Gray Body-Side Cladding
A. Sidemarker Lamp
B. Front Turn Signal/Parking Lamp1. 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.
5-55

Front Turn Signal, Sidemarker and
Daytime Running Lamps
Vehicles with no Body±Side Cladding
A. Daytime Running Lamp (DRL)
B. Front Turn Signal/Parking Lamp
C. Sidemarker Lamp1. Remove the headlamp assembly as mentioned
previously.
2. Press the retainer clip (arrow), located behind the
turn signal housing, towards the outside of the
vehicle.
5-56

3. Pull the turn signal housing out from the vehicle.
4. Press the locking release lever (the sidemarker
lampsdoes not have a locking release lever),
turn the bulb socket counterclockwise and remove it
from the turn signal housing.5. Remove the old bulb from the bulb socket.
6. Put the new bulb into the bulb socket. Use care not
to touch the bulb with your ®ngers or hands.
7. Put the bulb socket into the turn signal housing and
turn it clockwise until it locks (the sidemarker lamps
does not lock into place).
8. Put the turn signal housing back onto the vehicle
placing the hook and posts on the inner side into
the alignment holes ®rst and then the outer side into
the retainer bracket. Push until you hear a click.
9. Put the headlamp assembly back into the vehicle.
5-57

Daytime Running Lamps
Vehicles with Gray Body-Side Cladding
The DRLs are located in the front fascia near the
foglamps. They can be identi®ed by their square shape.
1. Reach under the front
fascia 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.
Taillamps
A. Stoplamp
B. Turn Signal Lamp
C. Back-up Lamp
1. Open the tailgate.
5-58

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.
Replacement Bulbs
Exterior Lamp Bulb Number
Low-Beam Headlamps 9006
High-Beam Headlamps *9011or 9005
Daytime Running Lamps (DRL) 4114K
Side 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
* Vehicles with Body±Side Cladding
For replacement bulbs not listed here, please contact
your dealer.
5-59