1987 Chevy r10 Pickup truck! 4.3! Won't start

Hi there,
I have a 1987 Chevy r10 pickup truck that is really similar to a silverado or 1500, its a single cab and it won't start anymore. It was starting and driving great a few days ago then I ran it entirely out of gas and now it won't start after I put more gas in it. It is fuel injected so I do not know if that is what makes the difference but it will turn over and crank the engine just won't fire up. Need some help please! Trying to sell it

have you checked spark or fuel?? try spraying carb cleaner in the throtle body
pull plug wire & check for spark.once you no whats missing you can start diagnosing

Did you get your truck started? If not, what have you tried so far?