Investigations


NHTSA IDManufacturerDate openDate closeSubjectRecall campaign
PARKING BRAKE
PE03057GENERAL MOTORS CORP.12/08/200304/09/2004PARKING BRAKE FAILURE
 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.

Consumer Complaints


Fail datemilesoccurencesPurchase date
PARKING BRAKE
06/12/2000200001
 Vehicle is experiencing problems with the emergency brakes. when the brake is applied, they will not hold the vehicle in position. provide further details. *nm
01/12/2005100001
 Vehicle is experiencing problems with the emergency brakes. this defect occurred shortly after the vehicle was purchased with just a few thousand miles. when applying the emergency brakes, they will not hold the vehicle in position. owner took the vehicle back to the dealer where a few adjustments were made but the problem still occurs. provide further details. *nm
06/12/199975001
 Vehicle is experiencing problems with the emergency brake. vehicle has been experiencing this defect since it was purchased. owner has taken the vehicle back to the dealer for a few adjustments. however, the problem still exist. provide further details. *nm
PARKING BRAKE - CONVENTIONAL
 Thottle restriction causes air to get into the distrubution/duct and into space to the right of the thottle pedal. consumer shoe or tie gets caught undereath the air duct. also, the parking brake released, causing vehicle to travel completely to the off position. *ak