Performance Systems Integration

I purchased a wiring harness from PSI for my 2016 Gen V LT L83 swap into an old Military Humvee. I went ahead and purchased the wiring harness, 02s, pedal, MAF, and ECU with tune. It was worth every cent. They literally lived up to there "Plug it up and fire it up" slogan. The quality of the harness was OEM, the connectors are factory connections and come complete with safety snaps. After my install i had some concerns with my swap because some parameter had changed and the engine was behaving undesirably. I did all the necessary testing and called PSI to speak with the tech guy, Gary, after sharing my test results we were able to figure out my issues and he even sent me the procedures I needed to complete to resolve my issue. Will purchase for my next swap. Thanks so much guys!

I stumbled across their website by chance, boy am I happy that happened. I had questions about LS swaps, mind you, I jave not purchased one thing from them. I sent a message to them.on Saturday, a few hours later I had a response. I would message them again and they responded, over the weekend. I highly recommend their service.

I called PSI the first time. A very knowledgeable person answered. He's more than willing to talk about my LSA wiring harness that I would like to purchases. Was very informative and possibly saveed me $700 not having to buy a controller for th 6L80. NOT TO MENTION $400 saved vs the gm wire harness. He told me their wiring kit with ECM and pedal can be program to work the internal controller of the 6 L 80. All I have to do is remove the controller ship to them and they will program it with purchase of the LSA wiring kit.

After you've done a complete build you always look back and wonder what you would have done differently. For me, I wouldn't have even bothered with an OEM conversion harness from a supplier and would have got a PSI harness right off the bat. After my original harness had left me stranded from a failed 15 year old brittle connection, I decided it was time for an upgrade. Following the recommendations from all my friends I turned to Performance Systems Integrations myself. It's unbelievably convenient to specify which motor and transmission you have, where the alternator is located in your application and even down to which injectors you are running so that your harness comes with the right length wiring, new delphi connections and new wire loom. With just a few wires to connect for the install, my 6.0 LQ4 was running like a top in just a few short hours. I love how the PCM is easily relocated to inside the cab rather than in the engine bay, also how the harness does not come off the side of the intake like it does on the OEM harness, but behind it, so it is a much cleaner package.

A no brainier for any of my future projects - ditch the OEM harness and get the best in the industry with PSI.