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Re: 07 Buick- Jumping Speedo- Network issue?
Posted to Technical Discussion Forum on 3/5/2020 14 Replies

Geoff, thank you for that info. Everything i read in shop key said the vehicle speed is calculated by the pcm to the best of my memory. I am home on my phone now, bit tom i will recheck myself and see if there is an actual speed sensor on the tranny. Login to read more.

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