Quote:
Originally Posted by MrChrisLS3
They don't have to prove anything if the car is modified from it's original factory configuration. This is one of the most misunderstood clauses in the Magnusen Moss Act. That clause refers to "tied in sales" and "replacement parts". I.E. GM can't force you to use only AC/Delco air filters, or Mobil 1 oil, by threatening to void your warranty. So long as the replacement part meets OEM specification and does not change the way the system operates or does not change the parameters. In that case, yes, they have to prove that the Fram Air filter or the Royal Purple Oil did not meet specification and therefore caused the failure.
But once you start modifying parts and systems to operate differently or outside of the factory parameters, all bets are off. They warranty the product they designed and manufactured. If the car is not designed and manufactured to run on e-85, and you set it up to run on e-85, it is no longer the car they warrantied, so no powertrain warranty.
They also apply multiple warranties. So if the My link goes out, it is still covered, as long as modifications did not cause the failure. Now, if you add a power amp or something as such, wire it up to that system, and it goes out, well, you are on your own. It's no longer the system as they built and designed it.
All that said, something like a TSB issue as this, may be a dealer choice thing. If they can effectively diagnose it, and repair it, without having to touch any of the aftermarket stuff, and especially fly it in under GM warranty inspection radar, then they might do it. As long as the dealer can get paid to do it. Now, if the warranty dept wants to see an ECU readout of the car, no deal, dealerships hands will be tied.
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"The Magnuson-Moss Warranty Act makes it illegal for companies to void your warranty or deny coverage under the warranty simply because you used an aftermarket or recycled part. The manufacturer or dealer can, however, require consumers to use select parts if those parts are provided to consumers free of charge under the warranty.
Still, if it turns out that the aftermarket or recycled part was itself defective or wasn't installed correctly, and it causes damage to another part that is covered under the warranty, the manufacturer or dealer has the right to deny coverage for that part and charge you for any repairs.
The FTC says the manufacturer or dealer must show that the aftermarket or recycled part caused the need for repairs before denying warranty coverage."