When your GMC Envoy XL was born, it was destined for a person with discerning taste who wants longevity in their automobile. While it may not be difficult to buy replacement parts for GMC vehicles, these days the necessity for nothing but the absolute best are required to fix your automobile. Make no mistake, you didn't buy your Envoy XL unless you wanted to buy horsepower and rugged design both impeccably combined into one car, truck, or SUV. It's not a regular occurrence that you discover you need a replacement Throttle Position Sensor to repair your car or truck.
Your fuel-injected engine requires constant communication between the engine control module and the throttle position sensor to maintain the best balance between power and gas mileage. The throttle position sensor on your GMC Envoy XL monitors the movement of the butterfly plates inside the throttle body and reports this to the ECU. At wide open throttle it may downshift and flood the fuel injectors for more power, or reduce fuel consumption when you let off the accelerator. Either way, the GMC Envoy XL throttle position sensor is absolutely critical to your engine performance.
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