2000 dodge ram fuel problems

Recently stopped at store and came back out and truck would barely start and when it did would barely run. thought it was going to die in the parking lot but finally picked up again. Now I can go in store and restart but is hard to start like its not getting fuel. After the first incident I ran fuel cleaner through the engine withfull tank of gas. This is a 6 cyl engine. Any suggestions.

check your battery i've had this problem a couple of times when i have drained the battery and when it was going bad