SKP SK420129 Engine Timing Chain Tensioner - Secondary

Engine Timing Chain Tensioner for GM Applications

Restore proper timing chain control with this SKP engine timing chain tensioner, part number SK420129. It is a secondary timing chain tensioner application for a wide range of Buick, Cadillac, Chevrolet, GMC, Pontiac, Saturn, and related GM vehicles, including Buick Enclave, Chevrolet Traverse, and Cadillac CTS models.

Key Features

• Engine timing chain tensioner for secondary timing chain applications
• Compatible with a broad range of GM vehicles from 2004-2022
• Fits applications noted as secondary, including listings that specify both tensioners
• Direct replacement reference for SK420129
• Cross-references Monroe Shocks & Struts 420129 for the same application

Fitment Overview

• Fits 2016-2022 Buick Enclave, Secondary; includes both tensioners on listed applications.
• Fits 2016-2022 Chevrolet Traverse, Secondary; includes both tensioners on listed applications.
• Fits 2016-2020 Chevrolet Impala, Secondary; includes both tensioners on listed applications.
• Fits 2016-2019 Cadillac ATS, Secondary; includes both tensioners on listed applications.
• Fits 2016-2019 Cadillac CTS, Secondary; includes both tensioners on listed applications.
• Fits 2016-2019 Cadillac XTS, Secondary; includes both tensioners on listed applications.
• Fits 2016-2017 Chevrolet Equinox, Secondary; includes both tensioners on listed applications.
• Fits 2016-2017 GMC Terrain, Secondary; includes both tensioners on listed applications.
• Fits 2016 Chevrolet Colorado, Secondary; includes both tensioners on listed applications.
• Fits 2016 GMC Acadia, Secondary; includes both tensioners on listed applications.
• Fits 2016 GMC Canyon, Secondary; includes both tensioners on listed applications.
• Fits 2004-2015 Cadillac CTS, N/A, Secondary.
• Fits 2009-2015 Chevrolet Traverse, N/A, Secondary.
• Fits 2007-2015 GMC Acadia, N/A, Secondary.
• Fits 2008-2015 Buick Enclave, N/A, Secondary.

What It Is Used For

• Correcting timing chain slack in secondary timing systems
• Addressing chain noise from worn or weak tensioner components
• Restoring stable chain control in high-mileage GM engines
• Replacing a failed tensioner during timing service
• Supporting proper valve timing operation in affected vehicles

Installation Notes and Tips

Verify engine code and timing system configuration before installation, since fitment is listed by vehicle, year, and secondary position. Confirm the application against the part number SK420129 and the vehicle’s timing layout, especially on models such as Chevrolet Traverse, Buick Enclave, and Cadillac CTS. Professional installation is recommended for timing system service.

Quality Assurance

SKP replacement parts are cataloged for direct-fit application matching. This part is identified by SK420129 and supported by OE-style interchange references for the listed GM timing chain tensioner applications.