All Investigations » Investigation PE03057

  Defect Investigation of Parking Brake Failure

Investigation of Parking Brake Failure

Subject: Parking brake failure
Components covered:
  • Parking brake
Investigations Summary: This investigation was opened on Dec. 8, 2003. It was closed on Apr. 9, 2004. Odi opened pe03-057 to assess parking brake ineffectiveness in the subject vehicles. These vehicles are equipped with four wheel disc brakes that incorporate a single-shoe drum-in-hat parking brake independent of the service brakes. Complaint and warranty data indicate that the parking brake linings tend to wear out early in the life of the vehicle (at an average of 24 months in service), reducing the parking brake system's torque below that needed to immobilize the vehicle. Gm has attributed this accelerated wear to foreign material intrusion and a failure of the brake shoe to properly self-center within its brake drum. Effective with the start of my 2003 production, a newer reduced force hold-down clip was introduced to facilitate brake shoe disengagement from the drum surface. This part is also available at the service level for the my 1999-2002 vehicles. Gm has indicated that the paking brake is intended to operate in conjunction with the transmission to immobilze parked vehicles, and that in many cases, accelerated parking brake lining wear is caused by rough use, vehicle modifications, and driving with the parking engaged. Odi has upgraded the preliminary evaluation to an engineering analysis to gather further information concerning parking brake usage factors and the circumstances surrounding the seventeen reported vehicle crashes.
Vehicles Affected by this investigation:
  • 1999 Chevrolet 1500
  • 2000 Chevrolet 1500
  • 2001 Chevrolet 1500
  • 2002 Chevrolet 1500
  • 2003 Chevrolet 1500
  • 1999 Chevrolet C Series
  • 2000 Chevrolet C Series
  • 2001 Chevrolet C Series
  • 2002 Chevrolet C Series
  • 1999 Chevrolet C/k Pickups
  • 2000 Chevrolet C/k Pickups
  • 2001 Chevrolet C/k Pickups
  • 2002 Chevrolet C/k Pickups
  • 2003 Chevrolet C/k Pickups
  • 1999 Chevrolet C10
  • 2000 Chevrolet C10
  • 2001 Chevrolet C10
  • 1999 Chevrolet C15
  • 2000 Chevrolet C15
  • 2001 Chevrolet C15
  • 1999 Chevrolet C1500
  • 2000 Chevrolet C1500
  • 2001 Chevrolet C1500
  • 2002 Chevrolet C1500
  • 2003 Chevrolet C1500
  • 2001 Chevrolet Gmt 800
  • 2002 Chevrolet Gmt 800
  • 1999 Chevrolet K Pickup
  • 2000 Chevrolet K Pickup
  • 1999 Chevrolet K Series
  • 2000 Chevrolet K Series
  • 2001 Chevrolet K Series
  • 2002 Chevrolet K Series
  • 1999 Chevrolet K1
  • 2000 Chevrolet K1
  • 1999 Chevrolet K10
  • 2000 Chevrolet K10
  • 1999 Chevrolet K15
  • 2000 Chevrolet K15
  • 2001 Chevrolet K15
  • 1999 Chevrolet K1500
  • 2000 Chevrolet K1500
  • 2001 Chevrolet K1500
  • 2002 Chevrolet K1500
  • 2003 Chevrolet K1500
  • 1999 Chevrolet Sierra
  • 2000 Chevrolet Sierra
  • 2001 Chevrolet Sierra
  • 2002 Chevrolet Sierra
  • 2003 Chevrolet Sierra
  • 1999 Chevrolet Silverado
  • 2000 Chevrolet Silverado
  • 2001 Chevrolet Silverado
  • 2002 Chevrolet Silverado
  • 2003 Chevrolet Silverado
  • 1999 Chevrolet Silverado 1500
  • 2000 Chevrolet Silverado 1500
  • 2002 Chevrolet Silverado 1500
  • 2003 Chevrolet Silverado 1500
  • 2002 Chevrolet Z71
  • 2000 GMC C Pickup
  • 1999 GMC C Series
  • 2000 GMC C Series
  • 2001 GMC C Series
  • 2002 GMC C Series
  • 1999 GMC C Series (light)
  • 1999 GMC C/k Pickup
  • 2000 GMC C/k Pickup
  • 2001 GMC C/k Pickup
  • 2002 GMC C/k Pickup
  • 1999 GMC C/k Series
  • 2000 GMC C/k Series
  • 2001 GMC C/k Series
  • 2002 GMC C/k Series
  • 2003 GMC C/k Series
  • 1999 GMC C1
  • 1999 GMC C15
  • 2000 GMC C15
  • 2001 GMC C15
  • 1999 GMC C1500
  • 2000 GMC C1500
  • 2001 GMC C1500
  • 2002 GMC C1500
  • 1999 GMC Gmt 800
  • 2000 GMC Gmt 800
  • 2001 GMC Gmt 800
  • 2002 GMC Gmt 800
  • 1999 GMC K Pickup
  • 2000 GMC K Pickup
  • 1999 GMC K Series
  • 2000 GMC K Series
  • 2001 GMC K Series
  • 2002 GMC K Series
  • 1999 GMC K1
  • 2000 GMC K1
  • 2000 GMC K15
  • 1999 GMC K1500
  • 2000 GMC K1500
  • 2001 GMC K1500
  • 1999 GMC Sierra
  • 2000 GMC Sierra
  • 2001 GMC Sierra
  • 2002 GMC Sierra
  • 2003 GMC Sierra
  • 1999 GMC Sierra 1500
  • 2000 GMC Sierra 1500
  • 2002 GMC Sierra 1500
  • 1999 GMC Silverado
  • 2000 GMC Silverado
  • 2001 GMC Silverado
  • 2002 GMC Silverado
  • 2000 GMC Z-71

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