RED LS1
SENIOR MEMBER
- Joined
- Dec 31, 2001
I read that in the index but I didn't know which wire was the A21 wire. I'm thinking it's the white loose wire in the first bank of the harness. In a search I saw Cal say you can flash the ECm by making a jumper in a plug behing the radio. I may be completely off with that though. I really want to know what wire A21 is.