1996 K1500 with a Vortec 5.7 About a year ago we bought this truck and the engine had to be cranked a while for it to start, so the dealer replaces the fuel pump and all was well for a while. Now it is hard to start again after sitting for a while, so I'm thinking the fuel pump is going out again only a year later? A couple days ago I was driving and the truck just shuts off. After sitting for about 10 minutes, it starts again and I drive home. I haven't tried to drive it since then. So, can a fuel pump be intermittently defective?