Chevrolet Avalanche 2004 Owner's Manual page 425

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.
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