GMC YUKON DENALI 2000 Manual page 310

Headlamps
Headlamp Removal
1. Remove the parking/turn signal assembly as
described under "Parking /Turn Signal Lamp
Removal" following this procedure.
2. Remove the two turn signal bulb sockets and the
sidemarker bulb socket from the parking/turn signal
assembly by turning them counterclockwise.
3. Set the parking/turn signal assembly to the side.
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4. Remove the two bolts at the top of the radiator
support as shown.
5. Pull the headlamp assembly out.