Hey guys, I've been having a few problems with my transmission shifting oddly from 1 to 2 and also seems to be searching for a gear when going around a corner. Based on several of the posts I'm reading, a tune would greatly help these issues. Plus, I've looked on the pcmforless website and a tune for my '02 envoy is only $140. DOes anyone have any thoughts on whether or not I should do this? It seems as if this site is very pro-tune, so if anyone has any advice I would greatly appreciate it! I have about 80K miles on the envoy.