Question about 1998 GMC Sierra

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1998 gmc sierra 1500... it is an automatic and I put it in drive and it will let me drive but won't switch gears and my speedometer wont work?

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You have a faulty speed sensor. It is located it at the rear left of the transmission. If it is a four wheel drive, it is located at the tailshaft of the transfercase.

Posted on Jul 27, 2009

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