Ok so I'm kind of having an issue. Replaced the starter and alternator a few months ago. I just got my truck back from the shop after totalling it (no engine damage) new: front suspension, axle, oil pan, transfer case, drie shaft, etc. Started having issue starting a couple of weeks ago when I got it back...maybe 4 days later, then it stopped and it started again yesterday. Today I got in started fine. Drove it probably 2 hours stopped at a store and turned it off and it started again. All accessory lights turn off like normal until I turn it over except for oil (new filter and obviously oil when I busted the pan.) When it starts the light goes off like normal. Walkyd out of the store and went to start it and it's the same thing but lower rpms and not starting. I'm thinkin I either have air in the fuel lines or my oil pressures down? Thoughts?

 

if there was air, then the motor would run a bit rough.
possibly fuel shut off solinoid, possibly weal oil pump pressure

 

Your fuel shut off solenoid might not be working properly. I've had this problem too