Have a 2002 2500hd w6.0 gas engine. Just turned 100,000 miles and had the tune up.Problem is truck starts right up morning no problem then as the day goes by seems like it takes 3 turns of key to start like a fuel problem! did change fuel filter on rail so its not that, was wondering if this is first signs of fuel pump on way out? Did post on tect section but no response, other than that runs great! Thanks for any help!