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because all the new Chevy auto trannys have problems similar to that. take it to the dealer, probly the modulator valve.

update, these trannies, if yours is a 2000-early 2003 have faulty pressure control solenoids, this is likely the issue, you could try having trans serviced and flushed first, i am reading that having the solenoid changed costs 500-600 dollars at a shop

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โˆ™ 2011-09-14 00:15:34
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Q: Why does your Chevy Impala shift hard from 1st to 2nd only after cars warms up but not all the time?
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