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: 1980-1990 Oldsmobile 98,Chevrolet Astro,Chevrolet Blazer,Pontiac Bonneville,Cadillac Brougham,Chevrolet C10 Suburban,Chevrolet C10,Chevrolet C1500 Suburban,Chevrolet C1500,Chevrolet C20 Suburban,Chevrolet C20,Chevrolet C2500 Suburban,Chevrolet C2500,Chevrolet C30,GMC Caballero,Chevrolet Camaro,Chevrolet Caprice,Pontiac Catalina,Chevrolet Cavalier,Chevrolet Celebrity,Buick Century,Chevrolet Chevette,Cadillac Commercial Chassis,Oldsmobile Custom Cruiser,Oldsmobile Cutlass Calais,Oldsmobile Cutlass Ciera,Oldsmobile Cutlass Cruiser,Oldsmobile Cutlass Salon,Oldsmobile Cutlass Supreme,Oldsmobile Delta 88,Cadillac DeVille,Chevrolet El Camino,Cadillac Eldorado,Buick Electra,Pontiac Firebird,Cadillac Fleetwood,GMC G10,GMC G1500,GMC G20,GMC G30,Pontiac Grand Prix,Chevrolet Impala,Pontiac J2000,GMC Jimmy,Chevrolet K10 Suburban,Chevrolet K10,Chevrolet K1500 Suburban,Chevrolet K1500,Chevrolet K20 Suburban,Chevrolet K20,Chevrolet K2500,Chevrolet K30,Chevrolet K5 Blazer,Pontiac LeMans,Buick LeSabre,Chevrolet Malibu,Chevrolet Monte Carlo,Chevrolet Monza,Chevrolet P20,Chevrolet P30,Pontiac Parisienne,Pontiac Phoenix,Chevrolet R20,Buick Regal,Buick Riviera,GMC Safari,Cadillac Seville,Buick Skyhawk,Pontiac T1000,Oldsmobile Toronado