Throttle position sensors measures throttle position through changing voltage and sends this information to the onboard computer. The computer uses this and other inputs to calculate the correct amount of fuel delivered. Symptoms of failure include poor starting, improper automatic transmission converter lockup, engine stumbling, stalling, and or a check engine light. There is no scheduled service for TPS sensors. Sensors are non-serviceable and must be replaced when failure occurs. Walker Products began supplying the fuel system needs of the automotive industry in 1946. Today Walker is one of the largest, privately owned manufacturers of fuel system components and engine sensors, and has served the needs of the worldwide automotive aftermarket. We are committed to supplying products manufactured to meet or exceed OEM standards and specifications. This effort is backed by our own manufacturing, product management and engineering staff to ensure it is maintained and accurate in the production of quality parts, vehicle applications, instruction sheets and technical support. Our products include Carburetor and Fuel Injection Repair Kits, Oxygen Sensors and other Engine Management products such as Throttle Position Sensors, Cam and Crankshaft Sensors, Fuel Injectors, Spark Plug Wires and Gaskets. As an ISO 9001: 2008/TS16949 certified company, we are committed to supplying the highest quality products. Vehicle Fitment: Buick Century 1997 - 2005, Buick Regal 1994 - 1996, Buick Rendezvous 2002 - 2005, Buick Skylark 1994 - 1998, Cadillac DeVille 1996 - 2005, Cadillac Eldorado 1996 - 2002, Cadillac Escalade 1999 - 2000, 2002, Cadillac Seville 1996 - 2004, Chevrolet Astro 1996 - 2005, Chevrolet Avalanche 1500 2002, Chevrolet Beretta 1994 - 1996, Chevrolet Blazer 1996 - 2005, Chevrolet C1500 1996 - 1999, Chevrolet C1500 Suburban 1996 - 1999, Chevrolet C2500 1996 - 2000, Chevrolet C2500 Suburban 1996 - 1999, Chevrolet C3500 1996 - 2000, Chevrolet Camaro 1998 - 2002, Chevrolet Cavalier 1995 - 2002, Chevrolet Corsica 1994 - 1996, Chevrolet Express 1500 1996 - 2007, Chevrolet Express 2500 1996 - 2005, Chevrolet Express 3500 1996 - 2002, Chevrolet Impala 2000 - 2005, Chevrolet K1500 1996 - 1999, Chevrolet K1500 Suburban 1996 - 1999, Chevrolet K2500 1996 - 2000, Chevrolet K2500 Suburban 1996 - 1999, Chevrolet K3500 1996 - 2000, Chevrolet Lumina 1995 - 2001, Chevrolet Lumina APV 1996, Chevrolet Malibu 1997 - 2003, Chevrolet Monte Carlo 1995 - 2005, Chevrolet P30 1996 - 1999, Chevrolet S10 1996 - 2004, Chevrolet Silverado 1500 1999 - 2007, Chevrolet Silverado 1500 Classic 2007, Chevrolet Silverado 1500 HD 2001 - 2002, Chevrolet Silverado 2500 1999 - 2002, Chevrolet Silverado 2500 HD 2001 - 2002, Chevrolet Silverado 3500 2001 - 2002, Chevrolet Suburban 1500 2000 - 2002, Chevrolet Suburban 2500 2000 - 2002, Chevrolet Tahoe 1996 - 2002, Chevrolet Venture 1997 - 2005, GMC C1500 1996 - 1999, GMC C1500 Suburban 1996 - 1999, GMC C2500 1996 - 2000, GMC C2500 Suburban 1996 - 1999, GMC C3500 1996 - 2000, GMC Jimmy 1996 - 2001, GMC K1500 1996 - 1999, GMC K1500 Suburban 1996 - 1999, GMC K2500 1996 - 2000, GMC K2500 Suburban 1996 - 1999, GMC K3500 1996 - 2000, GMC P3500 1996 - 1999, GMC Safari 1996 - 2005, GMC Savana 1500 1996 - 2007, GMC Savana 2500 1996 - 2005, GMC Savana 3500 1996 - 2002, GMC Sierra 1500 1999 - 2007, 2020, GMC Sierra 1500 Classic 2007, GMC Sierra 1500 HD 2001 - 2002, GMC Sierra 2500 1999 - 2002, GMC Sierra 2500 HD 2001 - 2002, GMC Sierra 3500 2001 - 2002, GMC Sonoma 1996 - 2004, GMC Yukon 1996 - 2002, GMC Yukon XL 1500 2000 - 2002, GMC Yukon XL 2500 2000 - 2002, Isuzu Hombre 1996 - 2000, Oldsmobile Achieva 1994 - 1998, Oldsmobile Alero 1999 - 2004, Oldsmobile Aurora 1996 - 1999, 2001 - 2003, Oldsmobile Bravada 1996 - 2001, Oldsmobile Cutlass 1997 - 1999, Oldsmobile Cutlass Supreme 1993 - 1997, Oldsmobile Intrigue 1999 - 2002, Oldsmobile Silhouette 1996 - 2004, Pontiac Aztek 2001 - 2005, Pontiac Bonneville 2004 - 2005, Pontiac Firebird 1998 - 2002, Pontiac GTO 2004, Pontiac Grand Am 1994 - 2005, Pontiac Grand Prix 1994 - 2003, Pontiac Montana 1999 - 2005, Pontiac Sunfire 1995 - 2002, Pontiac Trans Sport 1996 - 1998, Saturn L100 2001 - 2002, Saturn L200 2001 - 2003, Saturn LS 2000, Saturn LS1 2000, Saturn LW1 2000, Saturn LW200 2001 - 2003