Quote:
Originally Posted by bjcart
Update...the new sensor doesn't fit because part of the old sensor is still in the bore.  This happened on both sides....not so easy to pull out. 
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exactly what happens here...................................
the gm cheap crapo sensor with cheapo soft plastic breaks off... you must use lots of care and penitrating oil ...not wd-40 ...then after a few hours of soaking rotate back and forth to extract the sensor..
the soft plastic is easy to remove from the bore ..use a small drill bit and drill out the piece.. then use a magnet pick up tool to remove any metal droped into the bore..
when you install the new sensor measure the voltage when rotating the hub..should be 350mv AC or more...also the hub grease must be blue..if it is red this means the hub is defective/rusted and must be replaced..
with these issues resolved then coat the exterior of the sensor and hub area with a rust proofing sealant so the sensor will not get pushed out again..