Thanks for the add. I bought my first lt1 and t56 out of a 96 trans am but the engine isn't original to the car. It came out of a Corvette but I'm not sure which year. I also have the engine harness from the Pontiac and would like to use it instead of buying a new standalone harness.

 

Ther should be a derivative of the original vehicle VIN stamped on the block, driver side, behind the oil filter. Look for the letter that indicates the year:

From Shoebox

http://shbox.com/1/block_vin.jpg.

Do you have the PCM out of the Trans Am? What vehicle are you installing this in?

 

I Got the ECU and harness with three plugs pulled thru the firewall. I'm putting it into a 91s10

 

If the engine ran OK with the PCM and harness, the only issue you should have is interfacing it to your vehicle's body harness, where required. Is there a part # on the PCM (ECU)? That might tell us if it the Corvette unit or an F-Body PCM.

Here's a photo of a 1995 F-Body harness. 96 would have additional wires for the after-cat O2 sensors, EVAP vacuum switch, and crankshaft position sensor. None of that is required for the engine to run correctly.

1995 Z28 A4 Engine Harness

The three “firewall” connectors sounds like a match. Here is a table with the harness connector pinouts, from Shoebox:

http://shbox.com/1/harness_connector_faces.htm

 

THanks friend.
Found out that the engine is a 94
V0203ZWBi

Has the vats removed

 

If you’re basing that on the PCM part #, the 94 and 95 used the same part # 16188051. That's an OBD-1 PCM.

 

Off the code just above the pic
The I wasn't supposed to be added lol

 

Where was that code located? I’m not that familiar with the Corvette nomenclature. Just assumed the engine markings would be similar.

 

On the deck pad in front pass side cylinder head