Ok so for the first time last night my truck had some trouble starting. I waited for the glow light-light to go out and went to crank it, and it just didn't want to turn over, tried it again same problem but it turned over. Then no more problems starting it up and again tonight I had the same issue. The issue just started, and it doesn't happen all the time I go to start it. Theres no check engine lights, smoke, or loss of power the truck has 33.500 miles. Any of you guys have an idea whats causing it? Maybe I've just not been paying attention and giving the plugs enough time to warm.