89 gmc 2500 4x4 350
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- Posts: 1
- Joined: Mon Jun 30, 2014 12:41 pm
89 gmc 2500 4x4 350
the speedometer stops working and makes the transmission downshift, we replaced the vehicle speed sensor with no luck
Re: 89 gmc 2500 4x4 350
check out your instrument cluster. speed sensor sends info to the cluster and then it goes out to other computers. If the cluster turns off the pcm sees no speed reading
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