Chevy GMC Buick Olds Isuzu Saab Center High Mount Third Brake Light

Vehicle Fit
Warranty & Shipping
How-To & Tools
Product Reviews

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 our limited lifetime warranty. In the event this item should fail due to manufacturing defects during intended use, we will replace the part free of charge.

  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

4.95/ 5.0
20 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
Just what I needed!!!
Great product!!! Badass price and fast shipping!! The bonus was the video on how to install this third break light and made installation easy as 1.2.3.!!! Will be buying from 1AAUTO in the future!!! Keep up the great work guys!
March 21, 2019
Easy to install, just like the video says
I received this third brake light and watched the video once prior to installing. It was easy and it took me about 15 minutes total to remove the existing one and to install the new one. Awesome place to buy replacement parts.
April 4, 2019
The right part and it arrived on time
Got it when I needed it and easily installed as per 1A video.
April 24, 2019
Fits well, works great, great price
I was not sure how something like this would work. It arrived quickly, fitted the car perfectly, and works great. The youtube video for installation was awesome. I watched it a couple of times, and was able to get the installation done easily. Would definately recommend this part, and A1 Auto store in general.
May 12, 2019
Third tail light assembly fit perfect and was easily to find on the site. order came as promised and a very easy check out. And the movie on how to install was right on time.
July 6, 2019
This product is super bright and it’s really high quality feeling. It fits my 2002 Bravada which has a different molding than 2003-04 which is awesome because I didn’t have to change another piece out then. It works flawlessly and is brighter than the stock neon one.
July 18, 2019
What I needed.
The high level brake light replacement part fits and works exactly like the original. Car dealer wanted to replace the light and molding surrounding light for 10 times what I paid for just the light which is all that was needed. Video from 1A Auto showed me exactly how to replace the part.
November 21, 2019
Perfect Fit
This light was a reasonable price, it was shipped fast and it fit perfectly. I dont think a person could ask for anything more than that and yet I received more. I wasnt sure how to get to the screws so I watched onre of 1As videos on how to do the R & R. So, in my book, it just dont get any better than this.
December 6, 2019
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Fits the following Makes:

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

Out of Stock