issue w/ auto service. 2021 silverado half ton . z71 3.0 diesel. loved it until this last november. was out of town and vehicle died on road trip. got it home and took it to the dealer Spradley hyundai chevrolet. had trouble diagnosing the issue. concluded high pressure fuel pump and quoted $7200 to replace. had the dealer replace pump and it didn’t fix the issue. online diag threw another code. and dealer now wants to put in fuel rail for $2800 . asked for money back on the fuel pump. they said no but would split the cost of the fuel rail.