Hey I'm in the middle of performing a 2006 5.3 Vortec and 4l60E tranmission swamp into a customers 2003 Jeep TJ Rubicon. I'm using the factory GM computer and wiring harness that came out of the 1500 truck the engine and trans came out of. I have been using the HPTuners software to get the motor fired up and happy in the chasis and it is running great. The only issue I have left is our county's emissions is going to want to see the Jeep VIN on the computer on scan. I have read that the software gets un happy with an incorrect VIN. I assume that the Jeep VIN will be seen as incorrect since it is not even a GM VIN. Any guidance would be appriciated. Thanks.