Circuit Description
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The engine control module (ECM) adjusts the fuel delivery in order to control crankshaft speed at idle. If the ECM detects the engine speed is incorrect for the amount of fuel that is delivered, DTC P0507 sets.