I have an 03 cavalier, 2.2 eco, 5 speed, abs, cruise, etc. I need a new engine/trans wiring harness. When I had it in the shop, they replaced the old broken one with one that (i think) is from a different year model since nothing is connected to the trans. It runs great, but my speedometer/odometer doesn't work, the check engine/brake/abs/service lights stay on, reverse lights don't work, and occasionally the theft system/check gauges lights come on then my gauges all quit working and a/c quits working until I shift or go in neutral. If anyone can help put the right harness in my hands or on the car I would really appreciate it since the only one I can find is $1000+ for just part, no installation. (i made a thread because I had an ad in the classifieds but still no responses)
Ahhhh, go back to the shop immediately!!!
Went back the day after, refused to give me a refund or correct the problem. Has ignored my calls and dodged my visits since then. That's why I'm looking on here for some help, because I can't find ANY other than brand new