1998 Chevy Truck Won't start in the AM

Check the routing of your coil wire, this quote is from the Tech bulliten on this problem.
"General Motors has decided to conduct a Voluntary Emission Campaign involving certain 1996-98 C/K and M/L model vehicles equipped with 4.3L (L35) engines. Some of these vehicles may have been built with the ignition coil wire (distributor to ignition coil) too close to metal brackets or transmission fluid fill tube (M/L van only). If the coil wire is too close to these metal objects, a condition of grounding out through the wire insulation and plastic conduit (arcing) may cause failure of the wires. Failure of the wires can lead to a stalling/no start condition and/or catalytic converter failure.
To correct this condition, dealers are to reposition the coil wire to assure clearance from metal brackets and/or transmission fluid fill tubes. "