Walker Products Cam/Crank Sensors are engineered using the highest quality components to ensure proper OE fit, form and function. Walker, one of the largest manufacturers of Fuel System Components and Engine Management Devices, has served the needs of the worldwide automotive aftermarket since 1946. As a ISO 9001: 2008 / TS16949 certified company we are committed to supplying the highest quality products. Fit: Buick Rainier 2004, Cadillac CTS 2005-2004, Cadillac Escalade 2006-2002, Cadillac Escalade ESV 2006-2003, Cadillac Escalade EXT 2006-2002, Chevrolet Avalanche 1500 2006-2002, Chevrolet Camaro 2002-1999, Chevrolet Corvette 2004-1999, Chevrolet Express 2007-2003, Chevrolet Silverado 2006-1999, Chevrolet Silverado Classic 2007, Chevrolet SSR 2004-2003, Chevrolet Suburban 2006-2000, Chevrolet Tahoe 2006-2000, Chevrolet Trailblazer EXT 2004-2003, GMC Envoy XL 2004-2003, GMC Envoy XUV 2004, GMC Savana 2007-2003, GMC Sierra 1500 2006-1999, GMC Sierra Classic 2007, GMC Yukon 2006-2000, GMC Yukon XL 2006-2000, Hummer H2 2007-2003, Isuzu Ascender 2006-2003, Pontiac Firebird 2002-1999, GTO 2004