LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1984 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Diesel CEC Testing >> Removal & Installation >> Electronic Control Module (ECM) R & I >> Removal
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Electronic Control Module (ECM) R & I: Removal

Turn ignition switch off. Disconnect negative battery cables. Locate ECM and remove mounting hardware. Remove electrical connector from ECM and remove ECM. Remove PROM from ECM.

Fig 1: ECM Location. ECM is under right side of dash on Pickup models and under driver's seat on Van models.
G9482