GM Bonneville/Eighty Eight/LeSabre 1986-1999

Wheel Speed Sensors

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REMOVAL & INSTALLATION



Front
1994-95 vehicles

See Figure 1

  1. Disconnect the negative battery cable.
  2.  
  3. Raise and safely support the vehicle. Remove the tire and wheel assembly.
  4.  
  5. Detach the wheel speed sensor electrical connector.
  6.  
  7. Remove the front hub and bearing assembly. Clean the dirt from the sensor housing and sensor interface area.
  8.  
  9. Gently pry the wheel speed sensor slinger off, using a suitable prytool. Discard the old slinger.
  10.  
  11. Remove the sensor by gently prying the bearing assembly off with a suitable prytool.
  12.  



Click image to see an enlarged view

Fig. Fig. 1: Carefully pry off the wheel speed sensor slinger, then separate the hub and bearing from the sensor - 1994-95 vehicles

  1. Do not let debris get into the bearing while the sensor is removed. Do not add lubricant to the bearing through the sensor housing opening. The bearing is lubricated for the life of the vehicle. Do not clean the grease from the toothed sensor ring. The grease won't affect the sensor operation.
  2.  
  3. Inspect the bearing and sensor cap for any indication of water or debris entry. If you find any water or debris, you must replace the hub and bearing assembly.
  4.  

To install:
  1. Clean the sealant from the outer diameter of the bearing hub using a clean, lint free cloth.
  2.  
  3. Apply Loctite® 620, or equivalent locking fixative to the groove in the outer diameter of the bearing hub, per the directions in the service kit.
  4.  
  5. Using tool J-38764 or equivalent and a press, install the sensor.
  6.  
  7. Install the hub and bearing assembly and attach the sensor connector.
  8.  
  9. Install the tire and wheel assembly, then carefully lower the vehicle.
  10.  
  11. Connect the negative battery cable.
  12.  

1996-99 vehicles

See Figure 2

  1. Disconnect the negative battery cable.
  2.  
  3. Raise and safely support the vehicle. Remove the wheel and tire assembly.
  4.  
  5. Detach the wheel speed sensor electrical connector.
  6.  
  7. Remove the front hub and bearing assembly. Clean the dirt from the sensor housing and sensor interface area.
  8.  
  9. Using a split plate puller, tool J 22912-01 or equivalent, remove the sensor from the bearing assembly.
  10.  



Click image to see an enlarged view

Fig. Fig. 2: Front wheel speed sensor and removal and installation tools

  1. Do not let debris get into the bearing while the sensor is removed. Do not add lubricant to the bearing through the sensor housing opening. The bearing is lubricated for the life of the vehicle. Do not clean the grease from the toothed sensor ring. The grease won't affect the sensor operation.
  2.  
  3. Inspect the bearing and sensor cap for any indication of water or debris entry. If you find any water or debris, you must replace the hub and bearing assembly.
  4.  

To install:
  1. Apply Loctite® 620 to the groove in the outer diameter of the bearing hub, as instructed in the service kit.
  2.  
  3. Place the hub and bearing on a suitable stud protector ring.
  4.  
  5. Install the sensor, using a front wheel speed sensor installation tool, to press the sensor into place.
  6.  
  7. Install the hub and bearing assembly.
  8.  
  9. Attach the wheel speed sensor electrical connector.
  10.  
  11. Install the wheel and tire assembly, then carefully lower the vehicle.
  12.  
  13. Connect the negative battery cable.
  14.  

Rear

See Figure 3

  1. Disconnect the negative battery cable.
  2.  
  3. Raise and safely support the vehicle. Remove the wheel and tire assembly.
  4.  
  5. Detach the wheel speed sensor electrical connector.
  6.  
  7. Unfasten the lower strut attaching nut and bolt.
  8.  
  9. Clean the dirt from the sensor housing and interface area.
  10.  
  11. Unfasten the sensor Torx® mounting screws using a T15 bit, then remove the sensor.
  12.  
  13. Do not let debris get into the bearing while the sensor is removed. Do not add lubricant to the bearing through the sensor housing opening. The bearing is lubricated for the life of the vehicle. Do not clean the grease from the toothed sensor ring. The grease won't affect the sensor operation.
  14.  
  15. Inspect the bearing and sensor cap for any indication of water or debris entry. If you find any water or debris, you must replace the hub and bearing assembly.
  16.  
  17. Check the sensor ring and sensor for contact. If contact is found, the complete hub and bearing nut be replaced.
  18.  



Click image to see an enlarged view

Fig. Fig. 3: Location of the rear wheel speed sensor

To install:
  1. Lubricate a new sensor O-ring, then install the sensor to the housing.
  2.  
  3. Install the Torx® screws in a spiral pattern and tighten to 25 inch lbs. (2.8 Nm).
  4.  
  5. Install the lower strut attaching bolt and tighten to 140 ft. lbs. (190 Nm).
  6.  
  7. Attach the wheel speed sensor electrical connector.
  8.  
  9. Install the tire and wheel assembly, then carefully lower the vehicle.
  10.  
  11. Tighten the lug nuts to 100 ft. lbs. (136 Nm). Connect the negative battery cable.
  12.  

 
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