Dorman 420-129 Engine Timing Chain Tensioner
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Dorman

Dorman 420-129 Engine Timing Chain Tensioner

Brand Dorman 420-129
Adjustable No
Installation Hardware Included No
Installation Instructions Included No
Item Grade Standard Replacement
Material Steel
Mounting Bracket Included No
Package Contents 2 Timing Chain Tensions
Row Quantity 1
Tensioner Type Hydraulic
Fits Cadillac, Chevrolet, Buick, GMC, Saturn, and Pontiac · 200 vehicles

Standard replacement. Matches the fit and function of the original tensioner.

Hydraulic design. Delivers consistent chain tension for reliable engine operation.

Steel construction. Built from quality materials for durability and dependable performance.

Cross-references SKP SK420129, 11588255 and 12609259 for the same application. See all 3.

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Dorman 420-129 Engine Timing Chain Tensioner

Dorman 420-129 is a hydraulic engine timing chain tensioner built to match the fit and function of the original part on specified applications. It uses steel construction and standard replacement specifications for dependable timing chain control in GM and Cadillac applications, including Buick Enclave, Chevrolet Traverse, and Cadillac CTS coverage.

Key Features

  • Hydraulic tensioner design for engine timing chain control
  • Steel construction for durability in demanding engine environments
  • Standard replacement part for OE-style fit and function
  • Direct replacement for specified Buick, Chevrolet, Cadillac, GMC, Saturn, and Pontiac applications
  • Cross-references SKP SK420129 and OE numbers 11588255, 12609259

Detailed Description

This Dorman timing chain tensioner is engineered for engines that require precise chain tension to maintain valve timing accuracy. It is a direct-fit replacement for a wide range of vehicles, including 2018-2022 Buick Enclave, 2018-2022 Chevrolet Traverse, 2016-2019 Cadillac CTS, and 2007-2017 GMC Acadia applications. The part number 420-129 is also listed for additional coverage across Chevrolet Impala, Cadillac ATS, Buick LaCrosse, and Chevrolet Camaro models. If you are searching for a timing chain tensioner for a 2013-2019 Cadillac ATS or a 2008-2017 Chevrolet Equinox, this part number is part of the confirmed fitment list.

This part cross-references SKP SK420129 for the same application.

Common Problems This Part Can Address

  • Timing chain slack caused by a worn hydraulic tensioner
  • Engine noise related to inconsistent chain tension
  • Valve timing irregularities from tensioner wear
  • Starting or drivability concerns tied to timing chain control
  • Replacement needs during timing system service

Installation Notes and Tips

Verify engine code and fitment before installation, since this tensioner is listed for multiple platforms and positions, including secondary and N/A fitment notes. Confirm that the application matches the vehicle year, make, and model exactly before ordering. Because installation hardware and instructions are not included, use the correct service procedure and inspect related timing components during replacement.

Quality Assurance

Dorman manufactures this engine timing chain tensioner as a standard replacement part designed to match original fit and function on specified applications. The steel construction and hydraulic design support consistent operation in the listed GM and Cadillac timing systems.

Compatible Vehicles

  • Fits 2018-2022 Buick Enclave, Secondary
  • Fits 2022 Cadillac CT4, Secondary
  • Fits 2018-2022 Chevrolet Traverse, Secondary
  • Fits 2020 Chevrolet Impala, Secondary
  • Fits 2013-2019 Cadillac ATS, N/A
  • Fits 2016-2019 Cadillac CTS, Secondary
  • Fits 2013-2019 Cadillac XTS, N/A
  • Fits 2012-2019 Chevrolet Impala, N/A
  • Fits 2008-2017 Buick Enclave, N/A
  • Fits 2012-2017 Chevrolet Caprice, N/A
  • Fits 2008-2017 Chevrolet Equinox, N/A
  • Fits 2009-2017 Chevrolet Traverse, N/A
  • Fits 2007-2017 GMC Acadia, N/A
  • Fits 2017 GMC Acadia Limited, N/A
  • Fits 2010-2017 GMC Terrain, N/A
  • Fits 2016 Buick LaCrosse, Secondary
  • Fits 2016 Cadillac SRX, Secondary
  • Fits 2013-2016 Chevrolet Colorado, N/A
  • Fits 2016 Chevrolet Impala Limited, N/A
  • Fits 2015-2016 GMC Canyon, N/A
  • Fits 2010-2015 Buick LaCrosse, N/A
  • Fits 2005-2008 Buick LaCrosse, N/A
  • Fits 2004-2015 Cadillac CTS, N/A
  • Fits 2004-2015 Cadillac SRX, N/A
  • Fits 2010-2015 Chevrolet Camaro, N/A
  • Fits 2012-2015 Chevrolet Captiva Sport, N/A
  • Fits 2014-2015 Chevrolet Impala Limited, Secondary
  • Fits 2008-2012 Chevrolet Malibu, N/A
  • Fits 2005-2011 Cadillac STS, N/A
  • Fits 2008-2011 Chevrolet Captiva Sport, Secondary
  • Fits 2010 Buick Allure, Secondary
  • Fits 2005-2008 Buick Allure, Secondary
  • Fits 2007-2010 Saturn Outlook, N/A
  • Fits 2008-2010 Saturn Vue, N/A
  • Fits 2007-2009 Pontiac G6, N/A
  • Fits 2008-2009 Pontiac G8, N/A
  • Fits 2008-2009 Pontiac Torrent, N/A
  • Fits 2007-2009 Saturn Aura, N/A
  • Fits 2004-2006 Buick Rendezvous, N/A

Related reading

This part fits 200 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
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
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
SKP — SK4201291158825512609259