I dont know of any aftermarket tunes for GM vehicles. But as long as its set back to stock calibrations, no dealer would probably find out about it. And no, the ECM wouldn't command/control say such power mirror actuator. The ECM only controls powertrain basically. The BCM controls all body accessories(mirrors, power windows, radio, lights, etc...). It may not sound like a legal way to approach things, but it's what GM tells us per particular TSB number. But the only thing that i can say is, if a vehicle is supercharged, and their is a mechanical problem, we must prove that the supercharger is the cause of the problem before our dealership comes up with a verdict on the situation. But that particular Avalanche I had was GM's deal, and it isn't the first time they've done that. Plus the guy had way more done than just the chip installed. But still, if he only had that installed, he still wouldn't have a good arguement because he altered GM's design and calibrations, which voids powertrain warranty's. Its kind of a no Win situation unless you found a mod friendly dealership first, which is the first step I would take if I were you.

 

It varies with every failure, technician, manager and dealership. There is actually a bulletin that GM has describing how to check if the software has been altered although most places are not going to go that far to void a warranty and try to sell a repair. It's much easier to do a warranty repair with no need to call for approval than it is to get management involved, **** off a customer, try to sell a repair to a customer only to possibly have declined and make nothing. It's been years since I've dealt with MTI on Dairy Ashford, but they specialize in LS performance with their own dyno. Jason is the proprietor there and would rather tell you an aftermarket intake does not make the claimed horsepower and sell less to meet your expectation, than sell you the coolest stuff that comes with a cool sticker.

 

X100 these trannys SUCK.....never towed anything with my tahoe and 75K miles it dropped the tranny like a bomb going 75mph down the freeway...POS

 

His has the A6.

 

Seriously? GM LSx's have the support of the best. HP Tuners and LSx Edit.