I have a 95 Chevrolet pickup with a Vortec V6. Been running fine. Came home from work and parked for my three days off. Headed back in to work and went to start and vehicle just cranked and cranked. Not firing any suggestions. As i stated the vehicle has been running fine and a tune up was performed about a year and a half ago. New plugs ,wires, distributor etc. installed just to give a little history.
Chad

 

check spark, fuel, compression......one of those 3 aren't happening