2024 Silverado 1500 ZR2 cylinder 4 misfire

[First time Chevy owner]

Ok here we go 2024 Silverado 1500 ZR2 6.2 has a cylinder 4 misfire. The truck has 1000 miles on it and currently at the dealer for the problem. Dealer has replaced cylinder 4 spark plug, wire, coil, and today the ECM and still misfiring. Now the dealer says they are waiting on GM to get back with them to see what to replace next. Sounds to me like they are just throwing parts at it instead of diagnosing it properly. Anyone out there had the same issue or any idea what they should look at? You can feel it misfire at light acceleration in any gear you can’t feel it break torquing it or under heavy throttle. I’ve owned the truck for a month and the dealer has had it longer than it’s been in my driveway. HELP!!!!!

[Jus Cruisin]

Document and read up on lemon laws for your state. 

[newdude]

Sounds like its lifter or engine replacement time.  

[asilverblazer]

Only thing left to swap is an injector. Could be an intake gasket leak. Of course a proper diagnosis would lead to a coreect solution. 

 

Sounds like the dealer is convinced there is no spark in the cylinder. I would try to inspect wiring.

[First time Chevy owner]

Update the dealer finally replaced the injector and that was the problem