2010abmss you have a LS3 car and to change it back to the high octane fuel table dissconnect the battery for a couple hours or overnight, this will reset fuel trim for the manual trans cars. The 5-20 fuse pull only works on the auto trans cars.
We live at 4300ft elevation and our LS3 CGM SS needs some rpm to spin the hides as well, Its an altitude thing -lesssssss air. The closest we've had her to sea level is 1300 ft and she LIKES IT ALOT

Spins the hides no probs thru 1st into 2nd and a good chirp in 3rd