[GMCJOE]

Definitely check for spark. Have you replaced your fuel filter? It could be plugged up. You can also check to see if your fuel pressure regulator has went bad. Very common problem with these trucks. Sometimes they fail completely, or times they don't and you have extended cranking. Usually you can test this theory buy cycling the ignition ( don't start it) 5 times or more, then crank it and see if it starts. This builds pressure up. Or put a fuel press gauge on and see what kind of pressure it is putting out. If the fuel pressure regulator has failed, it could just be sending the fuel back to the tank thru the return line. So, you could also pull the return line of the regulator to see if fuel is being pushed from the tank by the pump.

Mine has a fuel pressure regulator issue right now, I do the cycling of the ignition and it starts right up.

Let us know if you changed your fuel filter. Check the spark, and fuel pressure regulator and get back with us. Also, can you here the fuel pump running in the tank?