82-92 Camaro / Firebird ECM Module Select Service Number 82-92 Camaro / Firebird ECM Module Select Service Number. These are good used ECM Computer units. The MCAL Prom (Chip) IS NOT INCLUDED. You must call or email for pricing and availability on the complete unit with MCAL Prom. We will need to know the... MSRP: Was: Price: Now: $200.00 - $250.00 Quick view View Options SKU: ECMMODULE