How to Replace Headlights 99-04 GMC Sierra 2500

Difficulty: Beginner · About 15 min · Gmc Sierra

Replace a headlight assembly on a 1999-2004 GMC Sierra 2500.

Steps

1. Handle the new bulbs carefully

   Avoid touching the bulb's glass with your fingers, since skin oil can burn into it and foul the light; clean it with rubbing alcohol and a soft cloth if that happens.

2. Remove the old headlight assembly

   Pop and secure the hood, twist and pull up the two anchor pins securing it, remove the assembly, then unplug the bulbs and harness.

3. Install the new headlight assembly

   Plug in the bulbs, reconnect the harness by clipping it in, line the assembly up and clip it into place, then put the two pins back to secure it.

Check your vehicle’s repair manual for exact specifications and fit.