Chevrolet Avalanche Owner's Manual page 390

Vehicles without Body-Side Cladding
To replace a headlamp bulb, do the following:
1. Open the hood. See Hood Release on page 5-10
for more information.
2. Remove the pin on the headlamp assembly by
turning the pin up and pulling it straight out.
3. Pull the headlamp assembly out.
5-52
A. Low-Beam Headlamp
B. High-Beam Headlamp
4. Unplug the electrical connector.
5. Turn the old bulb counterclockwise and remove it
from the headlamp assembly.
6. Put the new bulb into the assembly and turn it
clockwise until it is tight.
7. Plug in the electrical connector.
8. Reinstall the headlamp assembly.
9. Install the pin and turn it into the locking feature.