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This replacement high mount or (3rd) third brake light is just what you need to get your vehicle in good looking form again!


  • Replaces dealer part number: 15201921, 8-15201-921-0, 8152019210
  • LED bulbs
    • 4 large LEDs just like the original
  • Includes correct wire and connector
  • DOT (Department of Transportation) & SAE (Society of Automotive Engineers) approved
  • Direct replacement
  • Built to strict quality control standards
This high mount stop third brake light makes a great replacement and has good cost savings over a dealer unit.


Item Condition: New

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the 3rd Brake Light (0:46)
    • Open the tailgate and unplug the lead.
    • Pull the tailgate down open the window and lift the tailgate partially.
    • Remove the clip on the harness.
    • Pull the harness out.
    • Remove the two Phillips screws on the brake light.
    • Pull the light down and out. Unclip it from the truck.
  2. step : Replacing the 3rd Brake Light (3:30)
    • Put the light into place.
    • Run the harness back through the tailgate.
    • Replace the two Phillips screws.
    • Re-clip the harness.
    • Connect the lead.

Tools needed for replacement:

    Pliers, Cutters & misc Wrenches

  • Needle nose pliers

  • Screwdrivers & Related

  • Flat Blade Screwdriver
  • Phillips Head Screwdriver

4.92/ 5.0
12 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Easy to order, confirmation sent, part was as advertised.
February 6, 2017
High Brake Light
This piece fit exactly as advertised as an OE replacement. The video that showed how to replace the light was spot on. It actually was easier to install than to remove to old light. cj - Evans, GA
February 10, 2017
Great experience! Fast shipping and light works great! Fabulous price. Easy installation and happy customer! Buy with confidence!
February 27, 2017
I would recommend this website and I would purchase again from it if needed because I was satisfied with my purchase
March 13, 2017
Third brake light
Light fit great. Works great too. Im disappointed witht the tabs on the OEM frame it goes onto. They broke.
August 7, 2017
How to stop my wife from complaining
About the idiot light and brake warning ??. Watched the video, ordered the third brake light, saved over $100 vs Advanced Auto and my life happy ?? more complaining wife Thanks 1aauto
August 7, 2017
Fast service / Just what i needed / good prices TY Mike V
October 19, 2017
Great Price, Perfect Fit, and Got Quickly!!
I was actually pulled over not knowing my previous 3rd brake light had burned out. Needing an inspection in the next couple of weeks, it was imperative that I replace the old one ASAP. Advance Auto priced one for me and it was over $100 more that what I spent with 1A Auto! I knew I wasnt going to spend that much for a 3rd brake assembly but for grins checked w/Auto Zone and OReily Auto Parts. They too were way over priced. Obviously, the next thing I did was to go online and search other sources. I immediately found 1A Auto and the price was so low I could hardly believe it. To top it off, they had the exact youtube video I needed to reference how to remove the old one and replace it w/the one I just purchased. Lastly, same day FREEEEE shipping and got it in 2 days.
January 29, 2018
Just what I needed!!
I talked to a 1A rep on the phone as I had a fitment question. He assured me that the part was just what I needed. He was absolutely right. I was in the process of replacing the wing and the brakelight and needed assurance that this was the right part. Professional service is just what I needed. Quality part and prompt delivery. Thank You.
April 26, 2018
Great Service
I ordered my part, they double checked to make sure it was the correct part. It was, they sent it out and I received it in 3 days. Awesome experience. First time I have ever ordered any auto parts on line. I will order from 1A again, Thanks
May 2, 2018
third brake light
Perfect fit , outstanding price , will order all my parts and accessories from you , thanks again. R/S Melvin
September 9, 2018
Satisfied customer
Just like the video explained it. It match right up, just like the original. Satisfied once again
November 12, 2018
Will this fit my car? Add a vehicle to make sure
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Year Make Model Description
2004-2007Buick Rainier Buick Rainier Center High Mount Third Brake Light
2002-2009Chevy Trailblazer Chevy Trailblazer Center High Mount Third Brake Light
2002-2006Chevy Trailblazer EXT Chevy Trailblazer EXT Center High Mount Third Brake Light
2002-2009GMC Envoy GMC Envoy Center High Mount Third Brake Light
2002-2006GMC Envoy XL GMC Envoy XL Center High Mount Third Brake Light
2003-2008Isuzu Ascender Isuzu Ascender Center High Mount Third Brake Light
2002-2004Oldsmobile Bravada Olds Bravada Center High Mount Third Brake Light
2009Saab 9-7X Saab 9-7X Center High Mount Third Brake Light
Part #: 1ALTL01715

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(07:00 min)