Which PCM and Harness for LT1
Thread Starter
Junior Member
Joined: Feb 2005
Posts: 77
Likes: 0
From: DFW, TX
Car: 1992 RS Black
Engine: 305 TBI(LT1 swap soon)
Transmission: T5 (T56 for LT1 swap)
Axle/Gears: 4.10
Which PCM and Harness for LT1
I have a 92 LT1 thats out of a corvette and dont know if I have to go with a Corvette PCM or can I go with a Camaro PCM? Also should I get a painless wiring harness or use a good factory one from which ever PCM I go with? Help my out guys im really confused and have looked and can't find anyone who's done an older (92) LT1 swap.
Supreme Member
Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
You can use the 92 ECM, but like the 93 Z28 and Trans Ams, they require a chip instead of flashing the PCM itself. If it were up to what I was going to do, I would use a 94 PCM since they don't require a chip to program it for tuning, removal of stuff such as VATS or EGR etc etc. As far as the wiring, get a factory harness, it's not difficult to wire up, I think a total of about 8 or 9 wires to get it running, an LT1 harness is pretty much the same between them except for the 96-97 since they are OBDII instead of OBDI. The corvette fuel rail will exit from the passenger side insted of the driver side like the F-body fuel rails do as well.
Thread Starter
Junior Member
Joined: Feb 2005
Posts: 77
Likes: 0
From: DFW, TX
Car: 1992 RS Black
Engine: 305 TBI(LT1 swap soon)
Transmission: T5 (T56 for LT1 swap)
Axle/Gears: 4.10
So I can use a 94-95 Camaro PCM and Harness on the 92 Corvette Motor? I thought I had to stay with older PCM like 92(corvette)-93(camaro).
Supreme Member
Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
The 92 Vette is a SD setup, and the 94-95 is MAF, so you would have to get a MAF sensor for the car, but everything as AFAIK is plugs into the same places.
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