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  • GruvenParts Brass Lumbar Gears

GM Upgraded Lumbar Support Gears

0.50 LBS

Product Description

GruvenParts is happy to announce upgraded SOLID BRASS pinion gears for the drivers and passenger front seat lumbar support mechanisms found on most GM seats from 2000-present (check part numbers below to verify fitment).  The OEM lumbar support mechanism contains a plastic planetary gearing system which moves the lumbar support cushion within the seat.  The three small pinion gears within the lumbar support mechanism usually shatter and render the unit useless.  A replacement unit from GM is expensive and will also soon fail.

Dont buy an expensive new OEM unit when you can FIX AND UPGRADE your existing unit using high strength parts !  Our gears are also guaranteed for life and you already know how another OEM unit will end up !!

This gear kit contains (3) three brass pinion gears which mount to the main gear within the unit.  Each drive unit requires these three gears to operate properly.

Application :

This brass pinion gear seat replaces the 3 small plastic pinion gears in GM P/N 19-12-71-56 (19127156) for the drivers and passenger side front seat power lumbar support assembly.  This part number list will be continually updated as we learn of more lumbar support assemblies also using these same gears.

The estimated models using this lumbar support assembly are all GM vehicles from 2000 to present, however we ask that you check your OEM part number.  If it differs from that listed above, contact us and we can research and confirm fitment as we build the part number cross reference matrix.

We're also working on the DIY for this, however once the lumbar unit is removed from the seat back, its a matter of removing a few screws to separate the case halves and then removing/replacing the 3 small plastic pinion gears with the upgraded solid brass gears.




Product Reviews

  1. Electric lumbar support fix 5 Star Review

    Posted by on 16th Jun 2022

    My 07 Chey silverado ltz made with cheap plastic part all over and most have broken !
    Electric seat back and forth gears broke and fixed with Gruven gears. Lumbar support partially fixed. Both the up and down and in and out motions didn't work.
    Fixed the up and down motion but the gears and just about all plastic inside the gear box were broken and couldn't be repaired.

  2. Works perfectly 5 Star Review

    Posted by on 6th May 2022

    Installed these in my wife's 2005 Envoy Xl and the lumbar is working perfectly!

  3. Great solution to a common problem 5 Star Review

    Posted by on 20th Apr 2022

    Parts arrived quickly and appear to be a really good solution to a common problem. Lumbar is working Great!

  4. Parts worked perfect 5 Star Review

    Posted by on 11th Mar 2022

    Worked for 2008 Acura MDX lumbar gearbox.

  5. Great price for best repair parts. 5 Star Review

    Posted by on 15th Dec 2021

    The best price for replacement parts was twice the price of the gear kit to repair.
    And theses gears will last 10X longer than the factory ones.

  6. Expensive but finally fixed my problem 4 Star Review

    Posted by on 3rd Jul 2021

    I replaced the plastic gears once with plastic gears from the junk yard and they broke on the first drive! I wished someone made metal replacement gears. I found Gruvenparts from a youtube video on Chevy truck side mirrors and luckily they make these gears too. Worked perfectly. How about a video on this repair too? The side mirror video is excellent.

  7. Motor planetary gears 5 Star Review

    Posted by on 22nd Jan 2021

    Excellent solution to replacing failed plastic gears. Better than OEM.

  8. gears are great, could use a diy writeup 4 Star Review

    Posted by on 10th Dec 2020

    The gears fixed the issue, but replacing them was tough.

  9. Replacement Gears for Broken Lumbar Support. 5 Star Review

    Posted by on 5th Nov 2020

    This was the ultimate repair for broken lumbar support in my 2009 Silverado 2500 HD.

  10. Another Great Product 5 Star Review

    Posted by on 26th May 2020

    Although there is not a step by step on how to do this, if you have some mechanical awareness, its not hard at all. Just like the folding mirror part, quick and easy install and immediate improvement.

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