2000 gmc savana handicap van fails to start Brand new battery new starter new plugs newfuelpumpcranknostart

Frankly I can’t determine if this is a NO CRANK condition - OR - a NO START condition. Tell me what happens when key is turned to start position.. no engine cranking - - engine cranking ok - no start.

Full crank just wont start smtimes has backfire through manifold white smoke? Could it be crankshaft position sensor

Thanks for ur effort I will recheck post tomm. I researched several options on Google and it says these symptoms can be crankshaft position sensor OR cam shaft postions sensor ONLY 1 of them will backfire think maybe the CRANKSHAFT SENSOR? just odd because it has a full strong crank? Just ALOT of work for a grandmaw but cant be tougher than giveing birth right lmao THANKS FOR UR EFFORT.

Thank you for ur help will check back and update if this works .