I have a 2000 Express 2500 LS with 130k miles and the 5.7L motor after starting in the morning runs great if I stop anywhere for longer then a few minites it will not restart. if I wait about 30-40 min. it will start right up. I just replaced the fuel pump 2 months ago. has great spark but is orange not blue. It runs like new when it starts. I have replaced the cap rotor plugs and wires. I noticed the oil gauge doent move when cranking it and wont start and it does when it will start. Has anyone had this problem? I really dont want to keep buy crap I dont need.