2008 GMC Sierra 1500 Pickup Owner's Manual - Page 365

Front Turn Signal, Sidemarker and Daytime Running Lamps A. Sidemarker Lamp B. Retainer Clip C. Front Turn Signal Lamp D. Daytime Running Lamp (DRL) 3. Press the retainer clip (B), located behind the turn signal assembly, toward the outside of the vehicle. 4. Pull the turn signal assembly out of the vehicle. 5. Press the locking release lever, turn the bulb socket counterclockwise and remove it from the turn signal assembly. 6. Remove the old bulb from the bulb socket. 7. Install a new bulb into the bulb socket. 8. Insert the bulb socket into the turn signal assembly and turn it clockwise until it locks. To replace a front turn signal, sidemarker or DRL bulb, do the following: 1. Open the hood. See Hood Release on page 5-11 for more information. 2. Remove the headlamp assembly as described previously. See Headlamps on page 5-52 for more information. 5-53