Where is ECM grounded on 1990 Chevrolet pickup?

On a 1990 Chevrolet pickup, the Engine Control Module (ECM) is typically grounded at the engine block. The main ground connection is usually located near the intake manifold or on a bolt securing the engine to the frame. Ensuring a clean and secure ground connection is essential for the ECM to function correctly and communicate with other vehicle systems. Always refer to the vehicle's service manual for specific grounding locations and procedures.