My saturn vue may be seized. Was cranking but would not turn over. Now seems I cant get any power to it at all.

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My saturn vue may have seized. Car would crank but not turn over. Battery is good, cps crank positioning shaft replace. Starter was replaced. Oil was at appropriate level. All fluids good. No problems with overheating. Some electrical problems before car stopped working. A mechanic said he can manually get the engine to turn half way in either direction but then it locks. It no longer cranks only clicks and no power to the car even with battery being recharged.