RacinRust, the bulletin says to void coverage if a tune is detected, however, they cannot detect a tune on our computer once it has been removed if all parameters are reset to stock. Only the Global A and the Duramax offer this capability. BRB with a link.

 

https://www.performancetrucks.net/fo...4/#post4681830

https://www.performancetrucks.net/fo...4/#post4682805

 

If you read the bulletin carefully, it says to void the warranty if a tune is detected, even when the tune is SUBSEQUENTLY removed. This means that even if the tune is returned to stock AFTER detection, they are still to void the warranty. This service bulletin does not in any way describe a procedure to find a tune that has already been removed.

 

Voted

 

I just had a long block replaced in my truck under warranty a couple of weeks ago and I know for a fact that gm had asked for a snapshot of the cvn #'s from the pcm. I had restored the stock tune to the truck before dropping it off because I knew they would be looking for this. They could not see that the truck had a tune it. Not that the tune caused the problem anyways but as long as you restore the stock pcm and tcm tunes that came out of your truck you should be all set. I think it also makes a difference as to how cool your dealer is too.

 

As long as the complete stock tune is in when it goes into the dealer with a fried eng or trans you are good to go. If the tune is all stock there is no ability to detect if a custom tune was previously present.

If the OE tune has been altered gm factory is who determines that a tune was present based off of alteration of the CVN numbers and calibration numbers. All the dealer does is pull up the calibration information screen on tech 2 take a picture and email it to gm factory then they break it down and say yay or nay

Which I kinda agree with if I nuke a motor on juice or boost why should gm have to eat my bad decision.

 

Exactly. If something factory fails due to assembly or quality error, it will be repaired on their dime without regard for my tune that they can't see. If negligent nodding causes the failure, it will likely become evident upon tear-down and diagnosis and I will have to eat it, and rightfully so.

 

Modding not nodding. Damn autocorrect.

And I meant that the mods could be diagnosed by a visual inspection of the physical damage to the components. I still maintain that the tune, once returned to factory parameters, offers no clue to the dealers as to whether or not previous edits had been made to the programming.

 

Im working in Pearsall Tx right now until the 30th so when I get off Ill be ordering an Airaid Jr, porting the rear cat, and a custom tune

 

Good choice
My only reasons I wish I had gutted that last cat instead of swapping for the "muffler" is because I think the current setup, while it sounds nice, will be counterproductive once I start hunting again. I may be in the market for a factory 6.2 cat back once that time comes.