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The PROM (Programmable Read Only Memory), also called a "chip", contains the programming parameters for the ECM. 93 and older V8 ECMs and 92 and older V6 ECMs use a removable/programmable PROM. All newer style ECMS (Called PCMs now) have a programmable PCM, and do not use a PROM. Each PROM is specific to that year, make, model and transmission combination, therefore, there are literally hundreds of PROMS for Camaros & Firebirds. |
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