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.

	81-87 Carbureted V6 & V8	$25 used
	85 TPI V8	$25 used
	85-89 2.8L-V6	$25 used
	88-92 TBI V8	$25 used
	86-92 TPI V8	$25 used
	90-92 3.1L-V6	$25 used
	93 LT1 V8	$25 used

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