Ok I have a 98 Yukon 2wd and it has a 5.7L Here is what is happening now. Before I would crank but not start. Fuel Psi is at 61psi. It has spark, just replace ignition module. It ran fine on Saturday drove it all day. Then Saturday it would not kick over. Tried starting fuild, no go, poured gas right into throttle body, still no start. The timing on the Dist. is one tooth off. So that is a issue as well. I'm running out of ideals, the next thing where trying is a dist cap and rotor, but if I can solve it before thenI would like to save the money it'll cost to replace the dist parts.