my 2006 trailblazer shuts off if i slow down for a red light or stop sign etc. on 2006 Chevrolet Trailblazer

my windshield wipers go on their own and my car has to de driven with two feet It has shut off on the freeway in traffic when i have to slow down I have had the throttle cleaned, spark plugs replaced now what do i do? Oh yeah half of the panel lights are out on y climate and radio control and radio goes in and out.

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