Sounds like the engine is turning over. Once you have ruled out the charging system, fuel will be the next step. GM's are known for fuel pump issues. Have someone else crank the vehicle and try hitting the gas tank under the vehicle with a rubber hammer etc. More than likely it will start up.
Labour for Re & Re for the fuel pump in a 1995 GMC Jimmy
( 4 door w/ tank shield) 3.9 hours plus the cost of the pump
I recommend a dealer fuel pump