Cardone 77-7429 Engine Control Module (ECM) Reman For 1986 – 1987 Chevy / GMC
A-1 CARDONE. Improved over O.E. – O.E. quad drivers that are not short-protected are replaced with short-protected quad drivers to allow the vehicle owner to replace a single solenoid rather than the entire ECM when a short occurs, hence saving money.