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95 PCM controlling a 93 LT1s_willis 04-04-2008, 05:19 PM What all has to be done to swap the PCM out for one from a 94-95 so I can tune it? I know the 93 runs speed density and all that other stuff but will the connectors interchange or do I need to get a whole harness from a 94-95? shoebox 04-04-2008, 05:42 PM You will need a new engine harness at the least. The connections at the computer are even different. s_willis 04-05-2008, 08:14 AM Thanks Shoe! jay_rich 04-05-2008, 09:59 AM The 95 has some different tranny stuff too from the pre 94's. Unless ur running a T56. A 95 computer will search for TCC signal. Jay | ||