Question about 2000 Pontiac Grand Am GT

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Why won't my 2000 pontiac grand am se v6 shift into overdrive? if i am going downhill it will shift up but as soon as i give it gas it downshifts again? drives fine in other gears. someone told me it has to do with a sensor in the transmission?

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Have u run a trouble code test? if u have a problem with the electronics of the trans controls it will set a code, go to any Kragen or Autozone and they will test it for free.

Posted on Feb 25, 2009

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mine did the same thing,it would not shift into overdrive,when it did it kept downshifting. I had to replace the sensor that tells the transmission when to shift and not to. I think it was the shift sensor.

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