Pontiac Aztek 2003 Owner's Manual page 326

6. Turn the bulb socket one-quarter of a turn
clockwise.
7. Pull the bulb assembly out from the lamp housing.
5-46
5. Remove the bulb
access cover.
8. Unhook the electrical connector by lifting up the
gray tabs and separate the connector from the
bulb base.
9. Install the new bulb into the electrical connector.
Push the bulb firmly enough so that the gray tabs
hook over the tab on the bulb.
10. Put the bulb assembly back into the lamp housing
and turn the bulb socket one-quarter of a turn
counterclockwise.
11. Reinstall the bulb access cover making sure it is
in place.