My car shuts off on me while im driving and wont start back up. on 2000 Buick Park Avenue

I got a new alternator a new battery and a new feul pump. And it still shuts off I dont know whats wrong. When im driving I try and press the gas but it acts like it doesnt want to switch gears then it stalls and cuts off. And will not cut back on. And while im trying to cut it back on it drains my battery after like 10 min.

Asked by for the 2000 Buick Park Avenue
is your ck eng light on? if so scan codes and post so we can adv
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sounds like air/fuel issue. try ethanol treatment to clean fuel system. get diagnostic run.