Transmission controls

Asked by May 07, 2009 at 12:04 PM about the GMC Sierra C/K 3500

Question type: Maintenance & Repair

The truck upshifts and down shifts inapropriately and now will not go more than 35 miles an hour. We think that it may be a sensor. Please advize

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No one is going to be able to help with this information Year would help / engine / transmission type / Pre or post computer controls ???

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