I took my truck in for possible head gasket failure or oil cooler failure and they denied my warranty because of aftermarket parts. I put the truck back to stock before I took it in. My question is, Ford has done alot of work to the truck and used my warranty but now that its something major, they deny it, Whats the use of me having this warranty plus the ESP if they arent going to use it. The good thing is that I also bought a warranty when I bought the truck that covers everything including the aftermarket parts. Ive already talked to them and they said they would cover it. Should I call Ford and cancel the warranties or what should I do?