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How to Replace High Mount Third Brake Light 02-06 GMC Envoy XL

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How to Replace High Mount Third Brake Light 02-06 GMC Envoy XL

Created on: 2014-08-23

Need to replace the third brake light? Learn what the steps are with this how-to video

  1. step 1 :Removing the Third Brake Light
    • Open the lift gate
    • Pull out the brake light wiring harness grommet
    • Disconnect the brake light wiring harness
    • Open the lift gate glass
    • Remove the three Phillips head screws from the brake light
    • Pull the wiring harness through its slot
    • Unclip the wiring harness from the brake light
    • Pull the brake light down and out
  2. step 2 :Installing the New Third Brake Light
    • Put the new brake light into place
    • Insert the three Phillips screws into the brake light
    • Open the lift gate
    • Feed the wiring harness thorough its slot
    • Connect the brake light wiring harness
    • Push in the wiring harness grommet

Tools needed for replacement

  • Screwdrivers & Related

    Flat Blade Screwdriver

    Phillips Head Screwdriver

Installation Video
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Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace the third brake light on this 2003 GMC Envoy XL. It's the same part and similar process on the regular Envoys made after 2002. The items you'll need are a new third brake light from 1AAuto.com, a flat blade screwdriver, and a Phillips screwdriver.

Lift up your lift gate and pull on this grommet. Then, just keep pulling the harness out until you can get to the connector. Using a flat blade screwdriver, pry out on the tab and disconnect the harness. Now, open up the glass and remove these three Phillips screws. We'll just fast forward as Mike does that.Then, just pull the grommet and the harness up through this slot. Then, unclip it, and then just pull the third brake light down and out.

Up top, is the old third brake light. Below it, is the new one from 1A Auto. You can see they're identical and they'll fit exactly the same. Feed your new brake light up into place, and then replace those three Phillips screws. Now lift up your lift gate with the glass still open, and then just feed the harness down through the slot. Once you get it going, just open up your lift gate and pull it down and through the rest of the way. Make sure that it's on the right side of the hinge. Then, reconnect the harness and feed it back down into the hole and push the grommet back into place. Now, just test it out. You can see it works, so you're all set.

We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    Screwdrivers & Related

  • Flat Blade Screwdriver
  • Phillips Head Screwdriver

2002 - 2006  Chevrolet  Trailblazer EXT
2002 - 2009  GMC  Envoy
2002 - 2006  GMC  Envoy XL
2002 - 2004  Oldsmobile  Bravada
2009 - 2009  Saab  9-7X
2004 - 2007  Buick  Rainier
2002 - 2009  Chevrolet  Trailblazer
2003 - 2008  Isuzu  Ascender
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