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Q: what are the symptoms of a bad throttle? on 2002 Chevrolet Trailblazer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Whitout warning, my '02 trailblazer showed a "check engine" light as well as a "reduced speed" light....the car will not rev up above idle, but I ran it for enough to get to repair shop. The repair shop just called to say I needed a new throttle body. does this sound right for the symptoms I just described?
actually ANYTHING would sound right...bad transmission solenoid, stuck P/S switch, low vacuum reading, lost cam or crank synchronization, low charging voltage, take your pick...or add to the list.
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