any body tried a TS Performance tune not really looking for any more hp just better mpg is this what i need ,still on warranty i heard you just take it off and gm will never know ,trying to keep my cost down any thing else out there any body has tried and can approve ,just want to install and leave it alone thanks

i had one. (mp-8) according to the dic i got about 2mpg better on its max power setting. it had good power. pain install though. never did a hand calc though. also made me throw codes sometimes related to rail pressure (even though i did the shim kit) and sometimes a boost code when at sustained rpm's. would go into limp mode. luckily i always carry a code reader with me to read and clear

Its a major pain in the ass to install.