I have a 2015 Chevy Silverado 5.3, when I only had 10k miles on it. I got 3 codes for misfiring on three different days. Of course dealer said they had to change all the plugs. I said you have to be kidding me, they changed $800 to replace. I don’t drive it a lot, because of my shoulders are artificial replacements. Well @ 12k another misfire and another $200 bill. I called delco for warranty they said sorry charle. Please help me out I’m going nuts, they said that I don’t drive it enough, I asked that they fail being parked in a my garage? Thanks your the best mechanic I know, I live in Crossville Tn.
they said that I don’t drive it enough, I asked that they fail being parked in a my garage?
they make a valid point. Cars don't like to sit around, or take short trips. It's not good for them.
And your Silverado has a weak engine, unfortunately. They're prone to lifter failure.