Product: Ignition Knock Detonation Sensor Replace 213-3521 12589867 8104566030 Fits For Chevy Express Silverado Suburban Tahoe GMC Envoy XL Sierra Yukon
Brand: Rainco
Color: Two units
A vehicle knock sensor is a sensor screwed into the engine's block or cylinder head. It is used to measure engine jitter and to adjust ignition advance Angle when the engine produces knock.  The sensor creates a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion; the engine control module uses this signal to adjust the ignition timing and air/fuel mixture.  Fitment models:  Fits the Following Vehicles: 4.8L 5.3L 6.0L 2004 Buick Rainier 2004-2005 Cadillac CTS 2002-2006 Cadillac Escalade, EXT 2003-2006 Cadillac Escalade ESV 2002-2006 Chevy Avalanche 1500 1998-2002 Chevy Camaro 1998-2004 Chevy Corvette 2003-2007 Chevy Express 1500 2500 3500 1999-2006 Chevy Silverado 1500 2007 Chevy Silverado 1500 Classic, 1500 HD Classic 2001-2003, 2005-2006 Chevy Silverado 1500 HD 1999-2004 Chevy Silverado 2500 2001-2006 Chevy Silverado 2500 HD 2007 Chevy Silverado 2500 HD Classic, 2500 Classic 2001-2006 Chevy Silverado 3500 2003-2004 Chevy SSR 2000-2006 Chevy Suburban 1500 2500 2000-2006 Chevy Tahoe 2003-2004 Chevy Trailblazer EXT 2003-2004 GMC Envoy XL 2004 GMC Envoy XUV 2003-2007 GMC Savana 1500 2500 3500 1999-2006 GMC Sierra 1500 2006 GMC Sierra 1500 Classic 2001-2003, 2005-2006 GMC Sierra 1500 HD 2007 GMC Sierra 1500 HD Classic 1999-2004 GMC Sierra 2500 2001-2006 GMC Sierra 2500 HD 2007 GMC Sierra 2500 HD Classic 2001-2006 GMC Sierra 3500 2007 GMC Sierra 3500 Classic 2000-2006 GMC Yukon, XL 1500, XL 2500 2003-2007 Hummer H2 2003-2004 Isuzu Ascender NOTE: To ensure accurate fitment, please confirm your vehicle information before purchase, above models just for your reference, please refer to our replaces part number.
[High quality and durability]: The gm knock sensor kit constructed with premium materials for durability, manufactured to fit your GM vehicle, providing the same performance, durability, and service life as you expect.
[Replaces Part Number]: 213-3521, 12589867, 2133521, 8104566030
[Fitment Vehicles]: The knock sensor fits: 4.8 5.3 6.0 - 2003-2004 GMC Envoy XL; 2004 GMC Envoy XUV; 2003-2007 GMC Savana; 1999-2006 GMC Sierra 1500; 2006 GMC Sierra 1500 Classic; 2001-2003, 2005-2006 GMC Sierra 1500 HD; 1999-2004 GMC Sierra 2500; 2001-2006 GMC Sierra 2500 HD, 3500; 2000-2006 GMC Yukon; 2003-2004 Isuzu Ascender; 1998-2002 Pontiac Firebird; 2004 Pontiac GTO and more.
[What you can get]: 2 pcs x ignition knock sensor
[When you need to replace it]: Symptoms of a bad knock sensor are check engine light CEL on, loud sounds, bad fuel mileage, poor acceleration and poor engine performance. It means you need to replace the knock sensor for your car. When you replace the knock sensor please be careful the grime will fall into the cylinders when you pull the intake manifold off.

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