All Investigations » Investigation PE05020

  Defect Investigation of Unwanted Low-speed Abs Activation

Investigation of Unwanted Low-speed Abs Activation

Subject: Unwanted low-speed abs activation
Components covered:
  • Brake antilock
  • Service brakes, hydraulic:antilock/traction control/electronic limited slip
  • Service brakes, hydraulic:antilock/traction control/electronic limited slip:control unit/module
  • Brake antilock control unit/module
Investigations Summary: This investigation was opened on Apr. 28, 2005. It was closed on Sep. 13, 2005. Note: this investigation has resulted in a vehicle safety recall.
in a letter dated August 29, 2005, gm notified odi that it was recalling certain model year 1999 through 2002 c/k pickup trucks and sport utility vehicles to correct a problem with anti-lock brake system (abs) wheel speed sensor corrosion that may result in unwanted abs activation and extended stopping distances during low-speed braking (recall 05v-379). Gm's recall covers approximately 804,000 vehicles currently registered in the following 14 "salt-belt" states:connecticut, illinois, indiana, massachusetts, maine, michigan, new hampshire, new jersey, new york, ohio, pennsylvania, rhode island, vermont, and west virginia. The recall procedure will involve removing the sensor, cleaning the mounting surface, applying a rust inhibitor (zinc-x) to the surface, and reinstalling the sensor. If necessary, the sensor will be replaced. The population and failure report data given in this resume are for the full region that has been considered by odi as the "salt-belt. "that includes delaware, iowa, maryland, minnesota, missouri, wisconsin and the district of columbia in addition to the 14 states included in 05v-379. The states covered by gm's recall have the highest incident rates for the subject condition, accounting for 91% of the incidents, but only 24% of subject vehicle sales in the united states. Odi's analysis determined that 840 of the complaints, 244 of the crashes, and 16 of the injuries identified in this investigation occurred in those states. The resulting incident and crash rates are 96. 2 and 28. 0 per 100,000 vehicles respectively (note:rates are based on vehicle sales, not registered vehicles). The corresponding numbers in the excluded portions of the "salt-belt" are 399,000 vehicles, 81 incidents (20. 3 per 100,000 vehicles), 3 crashes, and no injuries. The statistics in the remaining 30 states are 2,406,000 vehicles, 168 incidents (7. 0 per 100,000 vehicles), 31 crashes, and one injury. Gm and odi are continuing to monitor the problem experience in states that are not included in the recall. Gm will provide odi with updated complaint, field report, and warranty data in November 2005. Odi and gm will review that data and assess the appropriateness of the current scope of the recall at that time.
Vehicles Affected by this investigation:
  • 1999 Cadillac Escalade
  • 2000 Cadillac Escalade
  • 2001 Cadillac Escalade
  • 2002 Cadillac Escalade
  • 2002 Chevrolet Avalanche
  • 1999 Chevrolet Sierra
  • 2000 Chevrolet Sierra
  • 2001 Chevrolet Sierra
  • 2002 Chevrolet Sierra
  • 1999 Chevrolet Silverado
  • 2000 Chevrolet Silverado
  • 2001 Chevrolet Silverado
  • 2002 Chevrolet Silverado
  • 1999 Chevrolet Suburban
  • 2000 Chevrolet Suburban
  • 2001 Chevrolet Suburban
  • 2002 Chevrolet Suburban
  • 1999 Chevrolet Tahoe
  • 2000 Chevrolet Tahoe
  • 2001 Chevrolet Tahoe
  • 2002 Chevrolet Tahoe
  • 2000 Chevrolet Yukon Xl
  • 1999 GMC Sierra
  • 2000 GMC Sierra
  • 2001 GMC Sierra
  • 2002 GMC Sierra
  • 1999 GMC Silverado
  • 2000 GMC Silverado
  • 2001 GMC Silverado
  • 2002 GMC Silverado
  • 1999 GMC Tahoe
  • 2000 GMC Tahoe
  • 2001 GMC Tahoe
  • 2002 GMC Tahoe
  • 1999 GMC Yukon
  • 2000 GMC Yukon
  • 2001 GMC Yukon
  • 2002 GMC Yukon

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