I've got a '99 GMC Sierra that I've tried some of the tuning tricks such as deleting torque managment, playing with the spark tables, etc. Well, my dad drove the truck and was really impressed with the power/response that it picked up. He's curious about doing the same to his 2007 Avalanche. Problem is, its under a 100k warranty. I'm assuming that deleting the torque management will void the warranty. Does anyone know for sure? How likely are they to find out if I do some tuning on his Avalanche?

 

Just do it on a separate PCM.

 

They can't just void the warranty for any mod. The can however deny a clam if they can prove that your modification caused the failure. There is case law to back this up. What software/cable are you using to do the tuning? Most likely if its older it won't work on the 07 Avy since they use a new style of communication protocol called CAN, where the older PCMs like your truck is VPW.

 

Using HPTuners. Thanks for the info.

 

how does the stealership know if you tune the truck just put the stock tune back on it if you have to take it in. i have hp tuners as well on a 07 and the dealership dont know.

 

actually "we" could void the powertrain warranty on the vehicle b/c of the tune. but the dealership can tell if they try and program it and the calibration is not any of the selected items. [/color=red] BUT [/color] our dealership doesn't frown upon a/m stuff. also it is good to save you OE program before you mess w/ the truck. if you need to bring it in then put everything back to OE specifications.