My 2010 SS broke a valve spring while driving about 20MPH in a parking lot. This caused the valve to drop and the piston imploded, causing the rod to come out of the side of the engine. GM said "Owner Caused" and would not honor warranty. Three months later GM agreed to pay labor and parts but charged us $5,000.00 for the engine. After inspecting the old engine the rod was broke and the lifter actually took a lobe off the camshaft.
We have asked for our $$ back but all I can say it this is the last GM car my family will own. GM offers this 5 year 100K powertrain warranty and then will tell you "Owner Caused" What the heck does that mean. GM will not tell us and they will no call us. They hid behind the dealer who has told us that GM should replace the engine.
David took down Goliath with a tiny stone and soon I will start printing the DMA or should I say the Dumb A$% name on the internet.
GM your not fair and your employee is this case is killing a already damage company.