Chevrolet 2004 Classic Owner's Manual page 248

1. Open the hood.
2. Carefully pull directly up on the two latches to
unhook the lamp assembly.
3. Remove the lamp assembly from the vehicle by
pulling it forward. Use care not to scratch the
vehicle with the lamp or the lamp with the fender.
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4. Unclip the wiring harness and twist the socket
less than one-quarter turn counterclockwise and
remove it.
5. Gently wiggle the bulb from the socket. Replace the
old bulb with a new bulb.
6. Turn the socket back into place and reconnect the
wiring harness to the socket.
7. Return the lamp assembly to its original position.
Be sure to line up the holes in the lamp assembly
to the round ends of the mounting pins.
8. Press down on the two latches to hook the lamp
assembly in place.