GMC Sierra Quiz
Vehicle Care

Headlamps, Front Turn Signal, Sidemarker, and Parking Lamps

In this manual: Vehicle Care
Introduction — 6In Brief — 46Seats and Restraints — 48Storage — 7Instruments and Controls — 75Lighting — 22Infotainment System — 22Climate Controls — 7Driving and Operating — 77Vehicle Care — 79Service and Maintenance — 26Technical Data — 8Customer Information — 25OnStar — 25Keys, Doors, and Windows — 38
~1min read
GMS Sierra: Headlamps, Front Turn Signal, Sidemarker, and Parking Lamps. A. Side Marker Lamp

1. Open the hood. See Hood on page 10‑5 2. If you are replacing the bulb on the passenger side, remove the Engine Air Cleaner cover. See Engine Air Cleaner/Filter on page 10‑17 for more information.

3. Reach in and access the bulb sockets from inside the engine compartment.

4. Turn the bulb socket counterclockwise to remove it from the headlamp assembly and pull it straight out.

5. Unplug the electrical connector from the old bulb by releasing the clips on the bulb socket.

6. Replace it with a new bulb.

7. Plug in the electrical connector.

8. Reinstall the new bulb socket into the headlamp assembly and turn it clockwise to secure.

Test yourself

A quick GMC Sierra quiz: every answer comes with an explanation and a link to the manual page.