there is a rumor going around that if we need to take our programmed car/truck in for repair ,Even if we reset the tune back to the original tune that GM can still detect that the car/truck's computer has been modified \.

Is there any truth in this ?

this is what was posted on a truck forum that ...

i have the same issues , I have a 2008 sierra 5.3 have the fuel tweaked what else can i do to get a bit more from the tune
thanks

i took my 2008 Sierra in today for an Oilchange and they noticed the DiabloSport sticker on the back window and said ,How much better is the diablo tune then the stock i just grinned

been reading that once i get home i will start doing some logs
thanks

Knock Retard (hereafter referred to as KR) is the response from the PCM to cylinder detonation. KR is the measure of the number of degrees of overall ignition timing advance that must be removed from the engine to prevent detonation from continuing, thus protecting the engine from damage

Hi , I have a 2008 Sierra 5.3L 4x4 everything stock but a new K&N CAI , right now i have installed the Diablo tune. I do notice a difference but after reading on here , should i have someone do a custom tune for the truck .
thanks.,, any feedback would be great