Pontiac 2005 Montana Owner's Manual page 373

Front Turn Signal/Parking Lamp
3. Pull the front turn signal/parking lamp assembly
away from the vehicle.
Front Sidemarker Lamp
4. Unscrew the bulb socket from the lamp
assembly by pressing the tab while turning
it counterclockwise.
5. Replace the bulb by pulling the old one out and
gently pushing the new one into the lamp socket.
6. Line up the tabs on the socket with the gaps in the
socket holes and screw the bulb socket back into
the lamp housing until a click is heard (the tab
popping back out).
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