If you're going to ask a question about something that's ailing your truck, please list as many of the following so that we can give you the best answer. 1) When did the problem start 2) Which engine do you have 3) Is your truck 4WD or 2WD 4) What year is your truck 5) What have you tried so far 6) Have you done anything to it recently that might be related 7) Are you wanting to fix it yourself If you just come on here and say "Why won't my truck start" there could literally be hundreds of reasons. There's lots of people here willing to help, but help us help you and give us as much info as you can that's related to the probelm. Also, when you get your problem fixed because of our help, pay it forward and post up what the problem and fix ended up being to help out future readers who may have the same issue.