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Dorman 420-129 Engine Timing Chain TensionerOE Quality 60-Day Returns
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Part #: 420-129

Dorman 420-129 Engine Timing Chain Tensioner

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⚙️ 200 vehicles fit this part
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🚗Fitment: Cadillac, Chevrolet, Buick, GMC, Saturn, and Pontiac, ATS, XTS, Impala, Enclave, Caprice, Equinox, Traverse, Acadia, Acadia Limited, Terrain, Colorado, Impala Limited, Canyon, LaCrosse, CTS, SRX, Camaro, Captiva Sport, Malibu, STS, Outlook, Vue, G6, G8, Torrent, Aura, and Rendezvous
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Overview of Dorman Engine Timing Chain Tensioner 420-129

The Dorman 420-129 engine timing chain tensioner is designed for reliable performance in various GM vehicles. This hydraulic tensioner helps maintain proper chain tension to ensure smooth engine operation in Buick, Cadillac, Chevrolet, GMC, Pontiac, Saturn models.

  • Hydraulic tensioner type for consistent chain tension
  • Standard replacement grade for dependable durability
  • Constructed from steel for strength and longevity
  • Includes 2 timing chain tensions in package contents
  • Compatible with multiple GM makes and models

Detailed Product Description

The Dorman 420-129 is a hydraulic engine timing chain tensioner engineered to maintain optimal tension on the timing chain, preventing slack and reducing engine noise or timing issues. Made from durable steel, this standard replacement part is built to meet OEM specifications without adjustable features or included mounting brackets and hardware. It is supplied as a set of two timing chain tensions, suitable for use in a wide range of GM vehicles including the Buick LaCrosse, Cadillac CTS, Chevrolet Camaro, GMC Canyon, Pontiac G8, and Saturn Vue among others.

Compatible Vehicles and Applications

This timing chain tensioner is compatible with the following makes and models:

  • Buick: LaCrosse, Enclave, Rendezvous
  • Cadillac: ATS, CTS, SRX, STS, XTS, CT4
  • Chevrolet: Camaro, Colorado, Equinox, Impala, Malibu, Traverse
  • GMC: Canyon, Terrain, Acadia, Acadia Limited
  • Pontiac: G6, G8, Torrent, GTO
  • Saturn: Aura, Vue

Common Issues Addressed by This Timing Chain Tensioner

  • Eliminates timing chain slack that can cause engine misfires
  • Prevents premature wear of timing chain components
  • Reduces engine noise related to loose timing chains
  • Helps maintain accurate valve timing for engine performance
  • Addresses tensioner failure symptoms such as rattling or chain jump

Installation Notes and Tips

The Dorman 420-129 tensioner is a direct replacement part but does not include mounting brackets, installation hardware, or instructions. Professional installation is recommended to ensure proper timing chain tension and engine timing. Verify compatibility with your specific vehicle model and engine type before installation.

Quality Assurance and Warranty

Dorman provides this engine timing chain tensioner as a standard replacement part manufactured from steel for durability and reliability. While installation hardware and instructions are not included, the part meets industry standards for fit and function. Warranty coverage details should be confirmed with the point of purchase or manufacturer.

BrandDorman
Part Number420-129
AdjustableNo
Installation Hardware IncludedNo
Installation Instructions IncludedNo
Item GradeStandard Replacement
MaterialSteel
Mounting Bracket IncludedNo
Package Contents2 Timing Chain Tensions
Row Quantity1
Tensioner TypeHydraulic

This part fits 200 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2022BuickEnclave3.6LV6SecondaryIncludes Both Tensioners
2022CadillacCT43.6LV6SecondaryIncludes Both Tensioners
2022ChevroletTraverse3.6LV6SecondaryIncludes Both Tensioners
2021BuickEnclave3.6LV6SecondaryIncludes Both Tensioners
2021ChevroletTraverse3.6LV6SecondaryIncludes Both Tensioners
2020BuickEnclave3.6LV6SecondaryIncludes Both Tensioners
2020ChevroletImpala3.6LV6SecondaryIncludes Both Tensioners
2020ChevroletTraverse3.6LV6SecondaryIncludes Both Tensioners
2019BuickEnclave3.6LV6SecondaryIncludes Both Tensioners
2019CadillacATS3.6LV6N/AFits Engine Timing Chain Tensioners
2019CadillacCTS3.6LV6SecondaryIncludes Both Tensioners
2019CadillacXTS3.6LV6N/AFits Engine Timing Chain Tensioners
2019ChevroletImpala3.6LV6N/AFits Engine Timing Chain Tensioners
2019ChevroletTraverse3.6LV6SecondaryIncludes Both Tensioners
2018BuickEnclave3.6LV6SecondaryIncludes Both Tensioners
2018CadillacATS3.6LV6N/AFits Engine Timing Chain Tensioners
2018CadillacCTS3.6LV6SecondaryIncludes Both Tensioners
2018CadillacXTS3.6LV6N/AFits Engine Timing Chain Tensioners
2018ChevroletImpala3.6LV6N/AFits Engine Timing Chain Tensioners
2018ChevroletTraverse3.6LV6SecondaryIncludes Both Tensioners
2017BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2017CadillacATS3.6LV6N/AFits Engine Timing Chain Tensioners
2017CadillacCTS3.6LV6SecondaryIncludes Both Tensioners
2017CadillacXTS3.6LV6N/AFits Engine Timing Chain Tensioners
2017ChevroletCaprice3.6LV6N/AFits Engine Timing Chain Tensioners
2017ChevroletEquinox3.6LV6N/AFits Engine Timing Chain Tensioners
2017ChevroletImpala3.6LV6N/AFits Engine Timing Chain Tensioners
2017ChevroletTraverse3.6LV6N/AFits Engine Timing Chain Tensioners
2017GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2017GMCAcadia Limited3.6LV6N/AFits Engine Timing Chain Tensioners
2017GMCTerrain3.6LV6N/AFits Engine Timing Chain Tensioners
2016BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2016BuickLaCrosse3.6LV6SecondaryIncludes Both Tensioners
2016CadillacATS3.6LV6N/AFits Engine Timing Chain Tensioners
2016CadillacCTS3.6LV6SecondaryIncludes Both Tensioners
2016CadillacSRX3.6LV6SecondaryIncludes Both Tensioners
2016CadillacXTS3.6LV6N/AFits Engine Timing Chain Tensioners
2016ChevroletCaprice3.6LV6N/AFits Engine Timing Chain Tensioners
2016ChevroletColorado3.6LV6N/AFits Engine Timing Chain Tensioners
2016ChevroletEquinox3.6LV6N/AFits Engine Timing Chain Tensioners
2016ChevroletImpala3.6LV6N/AFits Engine Timing Chain Tensioners
2016ChevroletImpala Limited3.6LV6N/AFits Engine Timing Chain Tensioners
2016ChevroletTraverse3.6LV6N/AFits Engine Timing Chain Tensioners
2016GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2016GMCCanyon3.6LV6N/AFits Engine Timing Chain Tensioners
2016GMCTerrain3.6LV6N/AFits Engine Timing Chain Tensioners
2015BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2015BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2015CadillacATS3.6LV6N/AFits Engine Timing Chain Tensioners
2015CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2015CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners
2015CadillacXTS3.6LV6N/AFits Engine Timing Chain Tensioners
2015ChevroletCamaro3.6LV6N/AFits Engine Timing Chain Tensioners
2015ChevroletCaprice3.6LV6N/AFits Engine Timing Chain Tensioners
2015ChevroletCaptiva Sport3.0LV6N/AFits Engine Timing Chain Tensioners
2015ChevroletColorado3.6LV6N/AFits Engine Timing Chain Tensioners
2015ChevroletEquinox3.6LV6N/AFits Engine Timing Chain Tensioners
2015ChevroletImpala3.6LV6N/AFits Engine Timing Chain Tensioners
2015ChevroletImpala Limited3.6LV6SecondaryIncludes Both Tensioners
2015ChevroletTraverse3.6LV6N/AFits Engine Timing Chain Tensioners
2015GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2015GMCCanyon3.6LV6N/AFits Engine Timing Chain Tensioners
2015GMCTerrain3.6LV6N/AFits Engine Timing Chain Tensioners
2014BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2014BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2014CadillacATS3.6LV6N/AFits Engine Timing Chain Tensioners
2014CadillacCTS3.0LV6N/AFits Engine Timing Chain Tensioners
2014CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2014CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners
2014CadillacXTS3.6LV6N/AFits Engine Timing Chain Tensioners
2014ChevroletCamaro3.6LV6N/AFits Engine Timing Chain Tensioners
2014ChevroletCaprice3.6LV6N/AFits Engine Timing Chain Tensioners
2014ChevroletCaptiva Sport3.0LV6N/AFits Engine Timing Chain Tensioners
2014ChevroletColorado3.6LV6N/AFits Engine Timing Chain Tensioners
2014ChevroletEquinox3.6LV6N/AFits Engine Timing Chain Tensioners
2014ChevroletImpala3.6LV6N/AFits Engine Timing Chain Tensioners
2014ChevroletImpala Limited3.6LV6SecondaryIncludes Both Tensioners
2014ChevroletTraverse3.6LV6N/AFits Engine Timing Chain Tensioners
2014GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2014GMCTerrain3.6LV6N/AFits Engine Timing Chain Tensioners
2013BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2013BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2013CadillacATS3.6LV6N/AFits Engine Timing Chain Tensioners
2013CadillacCTS3.0LV6N/AFits Engine Timing Chain Tensioners
2013CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2013CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners
2013CadillacXTS3.6LV6N/AFits Engine Timing Chain Tensioners
2013ChevroletCamaro3.6LV6N/AFits Engine Timing Chain Tensioners
2013ChevroletCaprice3.6LV6N/AFits Engine Timing Chain Tensioners
2013ChevroletCaptiva Sport3.0LV6N/AFits Engine Timing Chain Tensioners
2013ChevroletColorado3.6LV6N/AFits Engine Timing Chain Tensioners
2013ChevroletEquinox3.6LV6N/AFits Engine Timing Chain Tensioners
2013ChevroletImpala3.6LV6N/AFits Engine Timing Chain Tensioners
2013ChevroletTraverse3.6LV6N/AFits Engine Timing Chain Tensioners
2013GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2013GMCTerrain3.6LV6N/AFits Engine Timing Chain Tensioners
2012BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2012BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2012CadillacCTS3.0LV6N/AFits Engine Timing Chain Tensioners
2012CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2012CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners
2012ChevroletCamaro3.6LV6N/AFits Engine Timing Chain Tensioners
2012ChevroletCaprice3.6LV6N/AFits Engine Timing Chain Tensioners
2012ChevroletCaptiva Sport3.0LV6N/AFits Engine Timing Chain Tensioners
2012ChevroletEquinox3.0LV6N/AFits Engine Timing Chain Tensioners
2012ChevroletImpala3.6LV6N/AFits Engine Timing Chain Tensioners
2012ChevroletMalibu3.6LV6N/AFits Engine Timing Chain Tensioners
2012ChevroletTraverse3.6LV6N/AFits Engine Timing Chain Tensioners
2012GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2012GMCTerrain3.0LV6N/AFits Engine Timing Chain Tensioners
2011BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2011BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2011CadillacCTS3.0LV6N/AFits Engine Timing Chain Tensioners
2011CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2011CadillacSRX2.8LV6N/AFits Engine Timing Chain Tensioners
2011CadillacSRX3.0LV6N/AFits Engine Timing Chain Tensioners
2011CadillacSTS3.6LV6N/AFits Engine Timing Chain Tensioners
2011ChevroletCamaro3.6LV6N/AFits Engine Timing Chain Tensioners
2011ChevroletCaptiva Sport3.0LV6SecondaryIncludes Both Tensioners
2011ChevroletEquinox3.0LV6N/AFits Engine Timing Chain Tensioners
2011ChevroletMalibu3.6LV6N/AFits Engine Timing Chain Tensioners
2011ChevroletTraverse3.6LV6N/AFits Engine Timing Chain Tensioners
2011GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2011GMCTerrain3.0LV6N/AFits Engine Timing Chain Tensioners
2010BuickAllure3.6LV6SecondaryIncludes Both Tensioners
2010BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2010BuickLaCrosse3.0LV6N/AFits Engine Timing Chain Tensioners
2010BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2010CadillacCTS3.0LV6N/AFits Engine Timing Chain Tensioners
2010CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2010CadillacSRX2.8LV6N/AFits Engine Timing Chain Tensioners
2010CadillacSRX3.0LV6N/AFits Engine Timing Chain Tensioners
2010CadillacSTS3.6LV6N/AFits Engine Timing Chain Tensioners
2010ChevroletCamaro3.6LV6N/AFits Engine Timing Chain Tensioners
2010ChevroletCaptiva Sport3.6LV6SecondaryIncludes Both Tensioners
2010ChevroletEquinox3.0LV6N/AFits Engine Timing Chain Tensioners
2010ChevroletMalibu3.6LV6N/AFits Engine Timing Chain Tensioners
2010ChevroletTraverse3.6LV6N/AFits Engine Timing Chain Tensioners
2010GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2010GMCTerrain3.0LV6N/AFits Engine Timing Chain Tensioners
2010SaturnOutlook3.6LV6N/AFits Engine Timing Chain Tensioners
2010SaturnVue3.6LV6N/AFits Engine Timing Chain Tensioners
2009BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2009CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2009CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners
2009CadillacSTS3.6LV6N/AFits Engine Timing Chain Tensioners
2009ChevroletCaptiva Sport3.6LV6SecondaryIncludes Both Tensioners
2009ChevroletEquinox3.6LV6N/AFits Engine Timing Chain Tensioners
2009ChevroletMalibu3.6LV6N/AFits Engine Timing Chain Tensioners
2009ChevroletTraverse3.6LV6N/AFits Engine Timing Chain Tensioners
2009GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2009PontiacG63.6LV6N/AFits Engine Timing Chain Tensioners
2009PontiacG83.6LV6N/AFits Engine Timing Chain Tensioners
2009PontiacTorrent3.6LV6N/AFits Engine Timing Chain Tensioners
2009SaturnAura3.6LV6N/AFits Engine Timing Chain Tensioners
2009SaturnOutlook3.6LV6N/AFits Engine Timing Chain Tensioners
2009SaturnVue3.6LV6N/AFits Engine Timing Chain Tensioners
2008BuickAllure3.6LV6SecondaryIncludes Both Tensioners
2008BuickEnclave3.6LV6N/AFits Engine Timing Chain Tensioners
2008BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2008CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2008CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners
2008CadillacSTS3.6LV6N/AFits Engine Timing Chain Tensioners
2008ChevroletCaptiva Sport3.6LV6SecondaryIncludes Both Tensioners
2008ChevroletEquinox3.6LV6N/AFits Engine Timing Chain Tensioners
2008ChevroletMalibu3.6LV6N/AFits Engine Timing Chain Tensioners
2008GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2008PontiacG63.6LV6N/AFits Engine Timing Chain Tensioners
2008PontiacG83.6LV6N/AFits Engine Timing Chain Tensioners
2008PontiacTorrent3.6LV6N/AFits Engine Timing Chain Tensioners
2008SaturnAura3.6LV6N/AFits Engine Timing Chain Tensioners
2008SaturnOutlook3.6LV6N/AFits Engine Timing Chain Tensioners
2008SaturnVue3.6LV6N/AFits Engine Timing Chain Tensioners
2007BuickAllure3.6LV6SecondaryIncludes Both Tensioners
2007BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2007CadillacCTS2.8LV6N/AFits Engine Timing Chain Tensioners
2007CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2007CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners
2007CadillacSTS3.6LV6N/AFits Engine Timing Chain Tensioners
2007GMCAcadia3.6LV6N/AFits Engine Timing Chain Tensioners
2007PontiacG63.6LV6N/AFits Engine Timing Chain Tensioners
2007SaturnAura3.6LV6N/AFits Engine Timing Chain Tensioners
2007SaturnOutlook3.6LV6N/AFits Engine Timing Chain Tensioners
2006BuickAllure3.6LV6SecondaryIncludes Both Tensioners
2006BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2006BuickRendezvous3.6LV6N/AFits Engine Timing Chain Tensioners
2006CadillacCTS2.8LV6N/AFits Engine Timing Chain Tensioners
2006CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2006CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners
2006CadillacSTS3.6LV6N/AFits Engine Timing Chain Tensioners
2005BuickAllure3.6LV6SecondaryIncludes Both Tensioners
2005BuickLaCrosse3.6LV6N/AFits Engine Timing Chain Tensioners
2005BuickRendezvous3.6LV6N/AFits Engine Timing Chain Tensioners
2005CadillacCTS2.8LV6N/AFits Engine Timing Chain Tensioners
2005CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2005CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners
2005CadillacSTS3.6LV6N/AFits Engine Timing Chain Tensioners
2004BuickRendezvous3.6LV6N/AFits Engine Timing Chain Tensioners
2004CadillacCTS3.6LV6N/AFits Engine Timing Chain Tensioners
2004CadillacSRX3.6LV6N/AFits Engine Timing Chain Tensioners

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1158825512609259SK420129

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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