Re: Weird no start after oil change.
Ok, fuel pump still running gadter ignition shut off. We know that not normal. Pull up a wiring diagram of the ignition switch and get out the ole volt-meter. Based on that bit of info I think I'd be looking at the ignition switch as a possible culprit or at least a place to start.
Still, if as you said you have fire (spark at the plugs) and fuel it should start barring a mechanical timing issue...
Dan
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06 GMC Sierra crew cab Z71 DD leveling kit, 34's, bumper, LED lighting. Still doing stuff to it.
67 El Camino Custom 300 Deluxe. In progress.
55 GMC 371 2 1/2 ton. Upcoming project.
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