When you say it won't start and that there are no dash lights, does that mean when you turn the ignition to "start" that the engine does not crank over? Nothing happens at all? If so, that definitely sounds like an ignition switch/wiring issue. It will not be a PMD issue. PMD issues cause stalling problems, but it won't affect whether the engine cranks over or not.
Casey
1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 3.42's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 3.5" Kennedy exhaust, F code intake; dual t/stats, HO water pump, Champion radiator; Racor fuel filter