Is your check engine light on with a code related to the camshaft sensor? This AISELAN sensor is a direct, high-quality replacement for the common GM/OE part number 12584079 (also replaces 12568715, 12571266, etc.). It's built with durable ABS plastic and internal components to meet or exceed OEM specs. This specific sensor fits a wide range of GM vehicles from the mid-2000s, including the Chevrolet Trailblazer, Colorado, Cobalt; GMC Canyon, Envoy; Oldsmobile Bravada; Buick Rainier; Isuzu Ascender, i-280; Saab 9-7X; and Pontiac Ion (see full list in description). *Crucially, always double-check that this part number matches the one on your old sensor or your vehicle's requirements before ordering.* The package includes one sensor. It comes with a 12-month warranty for peace of mind. A straightforward fix that can restore proper engine timing and performance.