Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Yes, the "PCM" has to be in the car for it to be programmed and matched to the "BCM","TDM", "TCM" and "ABS" module. Your new PCM will have to do a re-learn at some point and I think it is better to let somebody with experience handle it. They can erase and program your VIN, but this has to be done through the OBDII connector so does the re-learn process. You can do a re-learn without the TechII but you will eventually need the TechII to clear all the codes encountered during the process. Some of which might leave your engine in limp mode until viewed and cleared.
I know How you feel I hate going to the dealer also but sometimes it's the only option. I even bought a TechII for myself to try and avoid the dealer lol....
Never drive faster than your guardian angel can fly