Oldsmobile 2001 Aurora - Manual (Page 300)

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4. Tip the headlamp assembly and while pressing the
release, turn the bulb and socket counterclockwise to
remove them.
5. Replace the bulb and socket. Then reconnect the
wiring harness to the lamp assembly.
6. Slide the lamp assembly back into place by lining up
the track on the bottom of the assembly with the
guide on the vehicle. Then connect the outboard snap
and secure the lamp assembly with the two bolts.