It has been reported that some G.M. vehicles using the 2.3L
      "Quad-4" engine have displayed a cranking - but no start
      condition after a replacement starter has been installed. Due to
      the tight fit/hard to reach location of this starter the Crank
      Positioning Sensor (CPS) may have been broken off when
      removing the old starter. This sensor is located directly behind the
      starter and can be sheered off rather easily when pulling back the
      starter from the vehicle. Caution must be used to remove the
      starter because the CPS is difficult to remove if it sheers flush
      with the block.