Quote:
Originally Posted by Mark114
My experience has been that all significant warranty work on my Camaro had to be approved by GM before the dealership would proceed with the repair. GM will not reimbursed a dealership for unauthorized repairs.
If GM denies a warranty claim then you have options to escalate with GM. If GM denies the warranty claim after the escalation and appeal process then you’ll have to decide if you’re going to pay for the repair or pay for a lawyer. Maybe your next move is to discuss this with a lawyer that specializes in lemon laws and warranty claims. They should be able to give you a more informed opinion of your options based on the applicable laws in your state.
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This is exactly correct.
The idea that a manufacturer must prove that an aftermarket part caused a failure comes from the Magnussen Moss Act involving warranties. In that legislation, it states that a company cannot force you to buy a specific brand of replacement part by voiding the warranty, so long as that part meets factory specifications. In other words, they can't void your warranty for not using AC Delco spark plugs or air/oil filters etc.
However, when you put a supercharger on an engine, and then tuning the ECM, that engine is no longer factory spec, thus no longer the engine that came from the factory, thus no longer covered by the factory warranty.
Even if the crankshaft was faulty, at this point there is no way to actually prove that. There is a very solid argument that had there been no supercharger, that the crankshaft may not have failed. You will lose that case every single time.
I'm sorry man, but the moment you bolted that supercharger on the engine, your powertrain warranty evaporated.