Chevrolet 1500 Engine Idle High

When It Is Very Cold Out (-20 C Or Colder), My Truck Will Start Okay But Will Not Fast Idle Long Enough To Remain Running. It Stalls After...

Replaced The Throttle Body, Tps, Iavc Valve, Egr Valve. Now The Idle Is High And Then Shuts Off. What To Test Or How To Fix?

If My Truck Sits For Longer Than A Few Hours, It Will Idle Very Rough On Start Up. If I Shift It Out Of Park During This Time It Will Stall...