GMC 2003 Safari Owner's Manual page 275

5. Remove the remaining three screws, the first one
from the corner reflector pocket and the two
remaining from the composite assembly.
7. Turn the halogen bulb
counterclockwise to
remove it from
the assembly.
8. Install the new bulb into the composite assembly by
turning it clockwise until it is completely tightened.
9. Reinstall the composite assembly by installing and
tightening all of the screws previously removed.
6. Remove the composite assembly.
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