Whats up guys? I know I asked this before but, where do I find the reverse wire on my 04 GMC ENVOY. I have a Grey and Beige connector at ABS control module.

Reverse Light lt. green + fuse box under left rear seat

You could also just go to the reverse light bulb in the back. If your unsure which is the power, just use a test light and have someone get in the truck, apply brake and put in reverse. If the test light lights when reverse is selected, splice into that wire and your done.