You have to send in your harness. Dalone wiring service and pcm calibration. I will disassemble your stock harness and remove all unnecessary connectors and misc connectors that are not needed for a standalone swap per your specs. I will add a 2 relay 4 fuse block along with a 3 foot wired obd2 connector with check engine light and cover in all new wire loom.
Every connection will be soldered and heat shrunk. When received you will only need to connect 3 wires to make it run.
Power wire to fuel pump. I will reconfigure your pcm to match your standalone converted harness to your specs. And 04 Gto harness's. The item "Wiring harness rewire service ls1,6.0,5.7,5.3,4.8, swap with tune" is in sale since Saturday, October 24, 2015. This item is in the category "eBay Motors\Parts & Accessories\Services & Installation\Restoration & Fabrication".The seller is "coolmike222" and is located in Ontario, California. This item can be shipped to United States.