GMC 2003 Savana Van Owner's Manual page 298

8. Without removing the headlamp assembly itself,
remove the bulb socket from the back of the
headlamp on the driver's side.
remove it from the socket.
9. Turn the bulb counterclockwise one quarter turn to
10. On the passenger's side, turn the bulb clockwise
one turn. Do not touch the glass part of the bulb.
11. Install the new bulb into the socket and return it to
12. Put the headlamp assembly back into the vehicle
the headlamp assembly.
and reinstall the two pins.
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