Pontiac 2005 GTO - Manual (Page 237)

4. Turn the appropriate bulb socket counterclockwise
while holding the assembly, to release it from the
housing.
5. Remove the bulb from the socket by pushing it in
and turning it counterclockwise. The turn signal
bulb must have amber colored glass.
6. Install the new bulb into the bulb socket by pushing
it into the socket and turning it clockwise.
7. Install the bulb socket into the lamp housing,
ensuring that the socket locks securely into place.
8. Reinstall the lamp assembly so that the clips are
seated correctly. Fit the housing to the body, so
that the locating pegs snap into the clips.
9. Install and tighten the screws to secure.
Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp 1156
Front Turn Signal and
Parking Lamp
1157NA
Headlamps
High-Beam H9
Low-Beam H11LL
Rear Turn Signal 1156NA
Stoplamp and Taillamp 1157
For replacement bulbs not listed here, contact
your dealer.
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