The replacement knock sensor is made for select 2009-2023 Buick, Cadillac, Chevy, GMC and other applications. It detects the vibration frequencies of engine detonation so the engine computer can retard ignition timing.

Walker Products 242-1101 Knock Sensor Features:

• Fits 2009-2023 Buick Enclave, Chevy Equinox, Malibu, Traverse, GMC Acadia; 2010-2019 Buick LaCrosse; 2011-2017 Buick Regal; 2012-2017 Buick Verano, Chevy Caprice
• Fits 2016-2022 Buick Encore; 2018-2020 Buick Regal Sportback; 2009-2019 Cadillac CTS; 2009-2016 Cadillac SRX; 2009-2011 Cadillac STS; 2013-2019 Cadillac ATS, XTS
• Also fits select Buick, Cadillac, Chevy, GMC, Pontiac, Saab and Saturn applications
• Female oblong electrical connector with 2 blade terminals
• 49.78 mm (2 in.) overall length
• Includes mounting hardware