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: 1993-2007 Oldsmobile Achieva,Oldsmobile Alero,Chevrolet Astro,Oldsmobile Aurora,Chevrolet Avalanche 1500,Pontiac Aztek,Chevrolet Beretta,Chevrolet Blazer,Pontiac Bonneville,Oldsmobile Bravada,Chevrolet C1500 Suburban,Chevrolet C1500,Chevrolet C2500 Suburban,Chevrolet C2500,Chevrolet C3500,Chevrolet Camaro,Chevrolet Cavalier,Buick Century,Chevrolet Corsica,Oldsmobile Cutlass Supreme,Oldsmobile Cutlass,Cadillac DeVille,Cadillac Eldorado,Cadillac Escalade,Chevrolet Express 1500,Chevrolet Express 2500,Chevrolet Express 3500,Pontiac Firebird,Pontiac Grand Am,Pontiac Grand Prix,Pontiac GTO,Isuzu Hombre,Chevrolet Impala,Oldsmobile Intrigue,GMC Jimmy,Chevrolet K1500 Suburban,Chevrolet K1500,Chevrolet K2500 Suburban,Chevrolet K2500,Chevrolet K3500,Saturn L100,Saturn L200,Saturn LS,Saturn LS1,Chevrolet Lumina APV,Chevrolet Lumina,Saturn LW1,Saturn LW200,Chevrolet Malibu,Pontiac Montana,Chevrolet Monte Carlo,Chevrolet P30,GMC P3500,Buick Regal,Buick Rendezvous,Chevrolet S10,GMC Safari,GMC Savana 1500,GMC Savana 2500,GMC Savana 3500,Cadillac Seville,GMC Sierra 1500,GMC Sierra 1500,GMC Sierra 2500,GMC Sierra 2500,GMC Sierra 3500,Oldsmobile Silhouette,Chevrolet Silverado 1500,Chevrolet Silverado 1500,Chevrolet Silverado 2500,Chevrolet Silverado 2500,Chevrolet Silverado 3500,Buick Skylark,GMC Sonoma,Chevrolet Suburban 1500,Chevrolet Suburban 2500,Pontiac Sunfire,Chevrolet Tahoe,Pontiac Trans Sport,Chevrolet Venture,GMC Yukon XL,GMC Yukon XL,GMC Yukon