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Hypertech Thermo Master For 1991 GMC Truck, 350 TBI Automatic Transmission, With Overdrive

Item EK-61-331733-1
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$155.99

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      Product Information

      Features, Description, Q&A

      Features

      • Increases Horsepower In Early Computer Controlled Cars
      • Controls Engine's Air/Fuel Ratio And Spark Advance For Maximum Power And Performance
      • Potential Gas Mileage Improvements
      • For Trucks With Automatic Transmission

      Description

      The ThermoMaster™ Power Chip is designed to be used with a 160° or 180° thermostat. Eckler's is proud to offer Hypertech Power Chips, the perfect upgrade for your GM classic. Hypertech Power Chips are direct replacements for the stock chips in your 1991 GMC K15 or K25 Truck. The Power Chip contains the Hypertech Power Tuning data that controls the engine's air/fuel ratio and spark advance for maximum power and performance plus, potential gas mileage improvements. Hypertech Power Chips from Eckler's Classic Chevy Trucks can be installed easily, using only hand tools. 1981-1995 GM automotive computers used replaceable PROMs or chips to calibrate the Electronic Control Module (ECM) for specific engine, powertrain, and vehicle combinations. Hypertech created the original

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