The GMC Sierra Camshaft Position Sensor supplies the engine control module with real time data on camshaft location and speed, letting the truck fire injectors and spark at precisely the right moment. Mounted just above the camshaft or behind the cylinder head on various model years, the Camshaft Position Sensor reads a toothed reluctor wheel and converts each passing notch into an electrical signal the ECM can count. By comparing this signal with the crank sensor the computer matches piston stroke with valve timing, keeping idle smooth, fuel economy high, and emissions low. Early versions applied simple magnetic pickups while later styles switched to quicker Hall Effect electronics, the main difference being that the newer Hall units produce a cleaner digital pulse that withstands electrical noise better and improves variable valve timing response. In many GMC pickups, Sierra models included, the wiring harness routes alongside the Camshaft Position Sensor for easier assembly. When a Camshaft Position Sensor fails the engine may misfire, stumble, or refuse to start because injector pulse width and ignition advance fall out of sync. Replacing the faulty Camshaft Position Sensor quickly restores confident GMC acceleration and reliable Sierra cruising, avoiding costlier damage to the valvetrain.
Each OEM GMC Sierra Camshaft Position Sensor we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.