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  • LS Timing Chain Dampener Tensioner - Gen IV 4.8L 5.3L 6.0L 6.2L LS3 L99 L96 LSA LC9 LMG L92 L9H L94 Replaces 12626407
  • LS Timing Chain Dampener Tensioner - Gen IV 4.8L 5.3L 6.0L 6.2L LS3 L99 L96 LSA LC9 LMG L92 L9H L94 Replaces 12626407
  • LS Timing Chain Dampener Tensioner - Gen IV 4.8L 5.3L 6.0L 6.2L LS3 L99 L96 LSA LC9 LMG L92 L9H L94 Replaces 12626407
  • LS Timing Chain Dampener Tensioner - Gen IV 4.8L 5.3L 6.0L 6.2L LS3 L99 L96 LSA LC9 LMG L92 L9H L94 Replaces 12626407
  • LS Timing Chain Dampener Tensioner - Gen IV 4.8L 5.3L 6.0L 6.2L LS3 L99 L96 LSA LC9 LMG L92 L9H L94 Replaces 12626407
  • LS Timing Chain Dampener Tensioner - Gen IV 4.8L 5.3L 6.0L 6.2L LS3 L99 L96 LSA LC9 LMG L92 L9H L94 Replaces 12626407

    • LS Timing Chain Dampener Tensioner - Gen IV 4.8L 5.3L 6.0L 6.2L LS3 L99 L96 LSA LC9 LMG L92 L9H L94 Replaces 12626407

    Michigan Motorsports

    $26.99
    (1 review) Write a Review
    SKU:
    E5300
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    Product Description

    Michigan Motorsports LS Timing Chain Dampener Tensioner

    Fits Gen IV LS-Based V8 Engines | 4.8L 5.3L 6.0L 6.2L | Replaces 12626407

    Replace a worn, damaged, or aging Gen IV LS timing chain tensioner with this Michigan Motorsports LS Timing Chain Dampener Tensioner. Designed for Gen IV LS-based V8 engines, this replacement tensioner fits many 4.8L, 5.3L, 6.0L, and 6.2L applications and replaces GM-style part number 12626407. The spring-style timing chain tensioner used on Gen IV LS engines is a known wear and failure point, making replacement a smart choice during timing chain service, camshaft swaps, DOD/AFM delete work, front cover service, or engine rebuilds. This is a direct replacement-style component for compatible LS3, L99, LSA, L92, L9H, L94, L76, L77, LY6, L96, LFA, LY5, LMG, LMF, LH6, LC9, LY2, and L20 engine applications.

    Key Features & Benefits

    • Direct Replacement Gen IV LS Tensioner: Designed to replace the timing chain dampener / tensioner on compatible Gen IV LS-based V8 engines. This is a practical replacement part when servicing the front of the engine or repairing a worn factory tensioner.
    • Replaces 12626407: Built as a replacement for GM-style part number 12626407, helping ensure the correct fitment for compatible Gen IV LS timing chain applications.
    • Fits Common Gen IV LS Engines: Fits many 4.8L, 5.3L, 6.0L, and 6.2L Gen IV LS engine platforms, including popular car, truck, SUV, and performance applications.
    • Recommended During Timing Service: The factory spring-style tensioner is a common failure point on Gen IV LS engines. Replacing it during timing chain replacement, camshaft installation, or front cover service helps reduce the chance of repeat labor later.
    • Great for Cam Swaps & Engine Repairs: Ideal for LS camshaft swaps, timing chain service, DOD/AFM delete jobs, engine rebuilds, front cover repairs, and high-mileage Gen IV LS maintenance.

    Specs

    • Product Type: LS timing chain dampener / tensioner
    • Engine Family: Gen IV LS-based V8 engines
    • Engine Sizes: 4.8L, 5.3L, 6.0L, 6.2L
    • Reference Part Number: Replaces 12626407

    Notes

    • Application: Replacement timing chain dampener / tensioner for compatible Gen IV LS engines.
    • Engine Compatibility: Fits compatible LS3, L99, LSA, L92, L9H, L94, L76, L77, LY6, L96, LFA, LY5, LMG, LMF, LH6, LC9, LY2, and L20 applications.
    • Service Note: The Gen IV spring-style timing chain tensioner is a common wear and failure point and should be inspected during timing chain or camshaft service.
    • Recommended Use: Timing chain replacement, camshaft swaps, DOD/AFM delete service, front cover service, engine rebuilds, and Gen IV LS maintenance.

    Key Fitments

    • Cadillac CTS-V 2009-2015 gasoline V8 models
    • Cadillac Escalade 2007-2014 gasoline V8 models
    • Chevrolet Avalanche 2007-2013 gasoline V8 models
    • Chevrolet Camaro 2010-2015 gasoline V8 models
    • Chevrolet Caprice 2011-2017 gasoline V8 models
    • Chevrolet Colorado 2009-2012 gasoline V8 models
    • Chevrolet Corvette 2008-2013 gasoline V8 models
    • Chevrolet Express 1500 2008-2014 gasoline V8 models
    • Chevrolet Express 2500 2008-2020 gasoline V8 models
    • Chevrolet Express 3500 2008-2020 gasoline V8 models
    • Chevrolet Express 4500 2010-2019 gasoline V8 models
    • Chevrolet Silverado 1500 2007-2013 gasoline V8 models
    • Chevrolet Silverado 2500 2007-2019 gasoline V8 models
    • Chevrolet Silverado 3500 2007-2019 gasoline V8 models
    • Chevrolet SS 2014-2017 gasoline V8 models
    • Chevrolet Suburban 1500 2007-2014 gasoline V8 models
    • Chevrolet Suburban 2500 2007-2013 gasoline V8 models
    • Chevrolet Tahoe 2007-2014 gasoline V8 models
    • Chevrolet Trailblazer 2007-2009 gasoline V8 models
    • GMC Canyon 2009-2012 gasoline V8 models
    • GMC Envoy 2007-2009 gasoline V8 models
    • GMC Savana 1500 2008-2014 gasoline V8 models
    • GMC Savana 2500 2008-2020 gasoline V8 models
    • GMC Savana 3500 2008-2020 gasoline V8 models
    • GMC Savana 4500 2010-2019 gasoline V8 models
    • GMC Sierra 1500 2007-2013 gasoline V8 models
    • GMC Sierra 2500 2007-2019 gasoline V8 models
    • GMC Sierra 3500 2007-2019 gasoline V8 models
    • GMC Yukon 2007-2014 gasoline V8 models
    • GMC Yukon XL 1500 2007-2014 gasoline V8 models
    • GMC Yukon XL 2500 2007-2013 gasoline V8 models
    • Hummer H2 2008-2009 gasoline V8 models
    • Hummer H3 2008-2010 gasoline V8 models
    • Hummer H3T 2009-2010 gasoline V8 models
    • Pontiac G8 2008-2009 gasoline V8 models
    • Saab 9-7X 2007-2009 gasoline V8 models
    • LS3 engine applications
    • L99 engine applications
    • LSA engine applications
    • L92 / L9H / L94 engine applications
    • L76 / L77 engine applications
    • LY6 / L96 engine applications
    • LFA engine applications
    • LY5 / LMG / LMF engine applications
    • LH6 / LC9 / LY2 / L20 engine applications
    • Fitment note: Fits compatible Gen IV LS-based gasoline V8 engines using GM-style timing chain tensioner 12626407.

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    • 5
      Quality part

      Posted by Robert Feller on Apr 24th 2026

      Great quality, direct bolt on replacement.