2000 Oldsmobile Bravada Car Stalling

Car will start fine & run good After driving the car long enough for the engine to get warm the car will then run good going down the road but when coming to a complete stop at take off the car will start Stalling will lose power & speed. No check engine light has come on have had it ran through diagnostic several times can't find the problem.
Have changed all of these parts with no results yet :
Fuel Pump
Internal Fuel Filter
External Fuel Filter
Plugs & Wires
Distributor cap
Distributor
Changed Oil