[ljustin293]

Originally Posted by Number 3

I hate to say this because I am sure some of you out there will try to disagree, but anyone who has an aftermarket calibration is giving up something. GMs OEM calibration is the best overall balance between HP, FE, Emissions, Noise and of course Durability of the powertrain (engine, trans and rear axle). A calibration has to be balanced to provide around town drivability, cruising on the highway and WOT performance. Plus it has to be done at temps from Northern Canada in the middle of winter to the highs in Phoenix in the middle of summer. Then throw in sea level on the coasts and 12,000 feet above sea level around Denver. This can take a year to get it just right.

Yes, someone can get you more HP, but you are giving up something.

+1