1995 Chevy z71, Was driving down the road, truck shut off, started it self back up a second later, did this about 4 times. Changed fuel filter. Drove truck, worked fine for about 30 minutes. Truck shut off & all warning lights shut off, truck is pumping fuel, turns over, wont fire. Seems to happen once truck is warmed up.
Check your pink wire going to the coil and see if it has power when the truck quits. If not it may be the ignition switch has gone bad and not sending power. Also check your distributor camsensor and crank sensor for to high a resistance. They can go bad but stil not set a code. Check yoru fuel pressure as long as you are at it. Lastly have the ignition control module checked it near the distributor. I think auto parts stores can check that.