GMC Yukon Owner's Manual page 291

Composite Headlamps
1. Remove the two
screws at the top of
the radiator support.
2. Pull the headlamp lens assembly out.
3. Unplug the electrical
connector.
4.
5.
6.
7 .
Turn the bulb to the left and remove it.
Put the new bulb in the lens assembly and turn it to
the right until it is tight.
'
Plug in the electrical connector.
Put the headlamp lens assembly back into the
vehicle. Install and tighten the two screws.
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