I have a 1969 K10 with a 2003 4.8 or 5.3 LS, 4l60e Trany and 205 Transfer . While trying to figure out the Transmission shift setting,I pulled the information from the ODBII connector using HP Tuners. That's when I saw the ECU has been programmed for a 6.0. I also have a 2002 Chevy Z71 with a 5.3 LS .
I said all of that to ask this : Is it okay to pull the program from the 02 and download it to the 03 ? They have the same gears, I would have to change the tire size.
Any information regarding this would be great.
Thanks.