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Do you have the performance shift on? Its the button on the side of the shifter. Pushed in is "Perf Mode" released out is normal mode. at night you will see it in green on the left, top side of the gauge cluster. If that's not it check the tranny fluid level.

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โˆ™ 2011-09-13 23:58:21
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Q: Why does my 1999 Pontiac grand prix gtp shift from 1st to 2nd at high rpm's?
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