2011 chevrolet 2500 hd n/g

[Bigboy1964]

Truck will turn over but not start had it in dealer and they replaced fuse box under hood, ran fine, then it started again. appears to be a loose connection as I can hit on fuse panel under hood and it will start. (Note, n/g has been shut down and not used).

[davester]

Either hit the fuse box with a bigger hammer, or remove the cover and look for loose connections or rubbed through wires.