1990 sierra no spark

I have a 1990 GMC Sierra(350 3/4 ton 2wD). The truck died while accelerating up a hill and has not started for me since. I have replaced the ignition coil, module, Plugs + wires, and the cap and roter. The moter turns like its trying to start but I am getting no spark in the #1 plug as I tested it. Any help would be greatly appretiated, need it for work.:eek: