Cranks but won't start sometimes

[ryano2121]

Every once in awhile over the past 3 weeks, I have turned the key, the engine cranks, but it doesn't turn over. The starter seems to be turning normal speed, it doesn't seem to matter warm or cold. So far it has started after the fifth or sixth time.

Any idea what is going on?

[Rattlesnake18]

What year truck?

[ryano2121]

Yeah, that would probably help. 2008