Just wondering about this. I work in a 3rd world country called Miami where the dealer with 20 techs has one broken Tech2 for all to share. So I often end up using my FS for warranty work (which is not bad). I was diagnosing a Saturn Vue with a 3.6 and selected several PIDs I wanted to monitor. When I went live, only the estimated cat. temp was working (none of the basic misfire PIDs, to my suprise). I went back and realized that only the E67 specific PIDs are live, and there are very few. Even when I check "supported" the GM specific PIDs don't seem to read. ???