Hi im new to chevys ive owned all cummins in the past and i was wondering i tried putting a bully dog on my 03 chevy z71 and it poped up as reduced power on the gauges and it was reall slowww....Thanks Zac

 

from the sounds of it you'll need to contact bully dog tech for that one.

 

But when i take it back to stock it runs like nothing happened to it

 

no codes pop up at all? what settings are you runnin on it? I've got a few friends with bullydogs on their diesel and it change it big time, in a good way

 

no codes at all idk and mines a 5.3

 

ohh i thought yours was a diesel...well your problem is that a programmer doesn't give you horsepower like it's advertised to do...just changes shift points and parameters of that sort. a custom tune will give you the power you're lookin for

 

where can i get a custom tune at ?

 

blackbear performance, Wheatley, or Nelson

them are the big three I believe