Chevrolet 2001 3500HD Manual page 218

Composite Headlamps
1. Remove the two hex head pins at the
locations shown.
2. Pull out the headlamp lens assembly.
3. Unplug the electrical connector.
5. Put the new bulb into the assembly and turn it
clockwise until it is tight.
6. Plug in the electrical connector.
7. Put the headlamp lens assembly back into the
vehicle. Install and tighten the two hex head pins.
4. Turn the bulb
counterclockwise
and remove it.
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