Ecm change - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-24-2010, 01:07 PM   #11
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all w-bodies have their ECM/PCMs underhood, has nothing to do with OBD2 requirements. it'* kind of unique, since the only other vehicle platform i can think of that has almost always been underhood was the corvette. that went underhood in 1990.

the 94-95 3800 Regal PCM is identical, save for connectors and case, to all of the other 94-95 3800 applications. where they connect on the PCB is slightly different, but the board itself where all of the discreets are is the same piece of hardware.
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Old 07-24-2010, 04:38 PM   #12
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Ahhh, thanks for the clarification.
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Old 07-25-2010, 10:44 PM   #13
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I would love to go with a tuneable 2.0 but wouldnt I have to change wireing harness?
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Old 07-25-2010, 10:46 PM   #14
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your existing PCM is tuneable... but i wouldn't know about having to swap harnesses. i could send you some diagrams if you want to determine it yourself?
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Old 07-25-2010, 10:58 PM   #15
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I thought 1.5 were locked or untunable.
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Old 07-25-2010, 11:07 PM   #16
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the 93-95 3100 is.... but the 94-95 3800 (be it L27, L36 or L67) is tuneable...
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