GMC SIERRA 1997 Manual page 320

Fender Marker Lamps
(Dual Rear Wheel Pickup Models)
1. Remove the screws and
. .
take the fender marker
assembly out of
,
. ..
. .
..
. . .
the fender.
2.
Turn the bulb socket
counterclockwise and
remove it from the
lens assembly.
3. Pull the bulb straight out of the socket.
4. Put a new bulb into the socket and push
it
in until it
is tight.
5. Put the socket back into the lens assembly and turn it
clockwise to tighten it.
6. Replace the lens and tighten the screws.
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