Engine has a loud tapping sound and starting to stumble, have a collapse lifter on a 5.3L. Sell it or trade it in only wanna give me $2500 for due to the engine failure. Ive maintained this vehicle. I work in the automotive industry change the oil every 5000 miles changed all the fluids spark plugs, brakes tires, no tears no rips, immaculate and I have a weight Ive had it since 2012 or 2013 engine failure is not acceptable well like compensation or have it repaired?