2003 GMC Envoy Owner's Manual - Page 346

Bulb Replacement For the type of bulbs, see Replacement Bulbs on page 5-52. For any bulb changing procedure not listed in this section, contact your dealer. 6. Remove the headlamp bulb by turning the socket counterclockwise. 7. To install the replacement bulb, reverse Steps 1 through 6. Halogen Bulbs Front Turn Signal anc3 Sidemarker Lamps Follow the same procedure listed for headlamp removal earlier in this section. Replace the turn signal or sidemarker bulb instead. I Halogen bulbs ha pressurized gas inside and can burst if you drop or scratch bulb. You or the others could beinjured. Be sure to read and follow the instructions on thebulb package. I Taillamps and Turn Signal Lamps 1. Open the Iiftgate. 2. Remove the two screws from the lamp assembly. Headlamps 1. 2. 3. 4. 5. Open the hood. Lift the inner quick release clips. Pull the headlamp assembly away from the vehicle. Remove the cover from the headlamp bulb. Disconnect the wiring harness. 5-51