I agree but they seem to think after reading some gm wiring info the alt field circuit has something to do with injector pulse. The priveious owner had one bank replaced but ran out of time and needed it back so they didn't do the other side. I don't have it here but I did go look at it. It won't idle long enough to warm up so i can read the balance rates. It had several problems. The first one I found was the coolant sensor was stuck at -40. Replaced that, they had the pcm reflashed. I don't have a gm book to read or trouble shoot with.
