I was just curious as to what your opinions are on the two tuning products and what experiences you may have with them. The reason to my interest in these is because I would rather not spend that much on actual "tuning software" nor have to buy a laptop. I could also purchase a reprogrammed pcm but that is a pain to deal with because I did that with my grand prix for years. The only Superchips programmer that MIGHT work is limited to '06 model year...not an '07 specific(not available). Plus it's more expensive than Hypertech. The new Hypertech model can tune over 100 gm vehicles in a wide range of years...much more flexible. I can get them both at-cost from a friend at an autoparts store, with the Hypertech about 40-50bucks cheaper. I would definitely lean toward ht. I know may not be worth it b/c it's only a 4.3 but it's all I have to work with...plus it's just fun to mod.