Walker 921-2343 Ignition Coil

Walker ThunderSpark Ignition Coil

Walker ThunderSpark ignition coil Part Number 921-2343 is a direct-fit ignition coil for select Buick, Cadillac, Chevrolet, and GMC vehicles. It supports confirmed applications across 2016-2020 models, including Buick LaCrosse, Cadillac ATS, Cadillac CTS, Chevrolet Camaro, and GMC Acadia.

The ThunderSpark line focuses on ignition components for specific vehicle applications, and this coil is listed for both ThunderSpark and later single-coil fitments. If you are replacing a failing coil on a 2019-2020 Chevrolet Blazer or a 2019 Cadillac CTS, 921-2343 is cataloged for those exact vehicles.

Key Features

• Walker ThunderSpark ignition coil for select GM vehicles
• Part Number: 921-2343
• Compatible With confirmed single-coil applications
• Fits 2016-2020 Buick, Cadillac, Chevrolet, and GMC models listed below
• Cataloged for Buick LaCrosse, Cadillac CT6, Chevrolet Colorado, and GMC Canyon applications

Fitment Details

• Fits 2019-2020 Buick Regal Sportback, N/A, Single Coil
• Fits 2020 Cadillac CT5, N/A, Single Coil
• Fits 2019-2020 Cadillac CT6, N/A, Single Coil
• Fits 2019-2020 Cadillac XT5, N/A, Single Coil
• Fits 2020 Cadillac XT6, N/A, Single Coil
• Fits 2019-2020 Chevrolet Blazer, N/A, Single Coil
• Fits 2019-2020 Chevrolet Camaro, N/A, Single Coil
• Fits 2019-2020 Chevrolet Colorado, N/A, Single Coil
• Fits 2019-2020 GMC Acadia, N/A, Single Coil
• Fits 2019-2020 GMC Canyon, N/A, Single Coil
• Fits 2019 Buick LaCrosse, N/A, Single Coil
• Fits 2019 Cadillac ATS, N/A, Single Coil
• Fits 2019 Cadillac CTS, N/A, Single Coil
• Fits 2017-2018 Buick LaCrosse, N/A, ThunderSpark
• Fits 2018 Buick Regal Sportback, N/A, ThunderSpark
• Fits 2016-2018 Cadillac ATS, N/A, ThunderSpark
• Fits 2016-2018 Cadillac CT6, N/A, ThunderSpark
• Fits 2016-2018 Cadillac CTS, N/A, ThunderSpark
• Fits 2017-2018 Cadillac XT5, N/A, ThunderSpark
• Fits 2016-2018 Chevrolet Camaro, N/A, ThunderSpark
• Fits 2017-2018 Chevrolet Colorado, N/A, ThunderSpark
• Fits 2017-2018 GMC Acadia, N/A, ThunderSpark
• Fits 2017-2018 GMC Canyon, N/A, ThunderSpark

Common Replacement Reasons

• Engine misfire or rough idle
• Hard starting or intermittent no-start condition
• Loss of spark output at one cylinder
• Check engine light related to ignition performance
• Driveability issues under load or acceleration

Installation Notes

Verify the vehicle year, make, model, and ignition configuration before installation. This part number is listed for single-coil applications and ThunderSpark applications, so match the cataloged fitment to the vehicle exactly. For best results, inspect spark plugs and related ignition components during coil replacement.

Quality Assurance

Walker ThunderSpark ignition components are cataloged for specific OE-style applications, and Part Number 921-2343 is listed for direct vehicle fitment on the models shown above. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.