Can someone help me with this? I did the wiring swap and I'm trying to run it off the 4l65 tune. Tried a 4l80 tune and would not work. It cranks and is stuck in 2 or 3 gear and does not change? If someone could fix or help me with this tune that would be great. I did a swap on a 07 1500 truck wring change and loaded a 4l80 tune worked great but no go on this one. I've been working on it a week PLEASE Help!!!
Thanks
Brad Brand