I changed front break pads now abs light is on and speedomoter is eratic causing trans to shift up and down unexpectedly
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2003 GMC Sonoma
Question: changed front breaks now problems with speedo
Answer #1dandd May 17, 2011, 16:00Master
The ABS light could have been triggered by accidentally bumping or damaging, or disconnecting a front wheel ABS sensor. I don't see how this would effect the transmission or the speedometer. The speedometer and transmission could be a defective vehicle speed sensor or VSS, which is located on the tail shaft of the transmission. If the VSS is defective it will also trigger an ABS light.