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Q:

What causes the van to immediately start to accelerate after starting it? on 2003 Chevrolet Express 2500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Every time the van is started it revs really high and when it is put in gear it wants to take off without touching the the gas pedal.
(1) Answer
Is the check engine light on? Try checking the throttle cable for sticking.