1997 Chevy Suburban

Did you use a gage and check fuel pressure? Some of the national brand autostores used to loan out a fuel pressure gage, if you don't have one? Engine cranking, do you have an injector pulse, use a noid lite. Did you try starter fluid in the intake to see if it will start or try? Yes, there are safety issues using starter fluid, safety is your responsibility. I usually take the air-duct loose from the throttle-body, open the throttle valve, squirt a small amount into the throttle-body. Stand back from the vehicle, have helper crank it. If something blows up, you used too much spray. I've never had any problems, some people have.