Avalanche, Express, Savana 2006-2007

Vehicle Speed Sensor

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Operation



The VSS supplies vehicle speed information to the PCM.

Removal & Installation



  1. Raise and safely support the vehicle.
  2.  
  3. Detach the electrical connector from the VSS sensor.
  4.  
  5. Remove the sensor from the transmission or transfer case.
  6.  
  7. Remove the O-ring seal.
  8.  
  9. Installation is the reverse of removal. Coat a new O-ring with transmission fluid. Tighten the bolt to 97 inch lbs. (11 Nm) on 2WD models or the sensor to 13 ft. lbs. (17 Nm) on 4WD/AWD models.

    Click image to see an enlarged view

    Fig. VSS mounting-2WD models



    Click image to see an enlarged view

    Fig. VSS mounting-4WD/AWD models

  10.  

Testing



  1. Remove the VSS.
  2.  
  3. Connect a digital multimeter set to the 0 to 1 AC volt scale to the terminals.
  4.  
  5. Pass a flat steel object across the tip of the sensor repeatedly.
  6.  
  7. The digital multimeter should indicate voltage each time the steel object passes the tip of the sensor. If not, replace the sensor.
  8.  

 
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