I haven't had one sign of a problem untill I got ready to start my truck 30 minutes after I last drove it today. It turns over fine and will try to hit some if I just lightly hit the starter. A GM mechanic said to bump the gas tank with a rubber mallet while someone was trying to start in to shock the fuel pump in case in was stuck but that didn't help. I am 20 miles from home so I am limited to what I can do here. The truck is an 01 Silverado with a LS1. It has a full tank of gas.