1989 corvette camshaft sensor

Your 89 Corvette has a MEMCAL inserted in the Computer (ECM). Since the ECM used in your corvette is also found in several other GM cars the MEMCAL has the Program SPecific for that body style.

On the MEMCAL for the 89 there wis 3 Integrated Circuits (ICs) 2 are used when the car goes into Limp Home Mode. the 3rd is a EPROM (Erasible/Programable Read Only Memory). so basically to change the program you would need to use UV light and re-program the code into the EPROM.

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