Well I just finished installing a LX9 in my 02 Rendezvous. Still running the 2002 LA1 PCM and it desperately needs some tuning. I really need to get my fan turn on temps down asap, engine is heat soaking too much to allow the 180 Tstat to do its job.
I get a failed validation check error, yet I saw in a recent post that 2.24 supports 02-04 Rendezvous. I have 2.24 installed, it reads the files OK and I was able to save it. Am I out ta luck? Or am I potentially able to swap a 03 or other supported PCM in it.