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Dear Auto Advisor, I have 2000 4wd Blazer that loses 3rd and 4th gear. When this happens the ABS light comes on and speedometer quits working... After driving in 2nd gear for a short time, everything begins to work properly. I was told the speed sensor on transmission is causing problem? Tom S. Charlotte, NC

Dear Auto Advisor, I have 2000 4wd Blazer that loses 3rd and 4th gear. When this happens the ABS light comes on and speedometer quits working... After driving in 2nd gear for a short time, everything begins to work properly. I was told the speed sensor on transmission is causing problem? Tom S. Charlotte, NC Tom, The Vehicle Speed Sensor (VSS) may be exactly what the problem is. Or it may be something that may require reprogramming the computer to solve this problem. (Or both) The best advice I can give you is find a shop that can monitor the ABS system and the transmission to make sure what the problem is. Just changing parts can be expensive and counterproductive.

 

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