superchips' tuner says it works for gm trucks too. can i not use the predator i have for my 05 escalade and use it on my g8 instead?

yes its after the tune before i start the truck, and it goes away after the 1st occurance. but why the lack of low end power?

I tried both the premium and 87 octane tunes on my escalade and both times it says reduced power on the dash and it feels slower both times. the escalade had lots of low end torque and after the tunes it lost it. it also says after both tunes "reduced power" on the cluster display. help?!?

Predator ...