Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
40–25K
1525–50K
2050–75K
2775–100K
40100–150K
17150K+
123 reports with mileage · 17 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Service Brakes, Hydraulic. Review the 59 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Service Brakes. Review the 40 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Parking Brake. Review the 13 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
10 crash reports0 fire reports2 injury reports
What owners actually said
140 reports
Mileage unknown · May 9, 2005
EquipmentParking Brake
THE EMERGENCY BRAKES ON MY TRUCK HAVE ONLY BEEN ACTUALLY USED 4-5 TIMES. THEY DO NOT HOLD AND I'M TOLD WILL NOT PASS MY ANNUAL SAFETY INSPECTION. I HAVE BEEN TOLD BY SEVERAL MECHANICS ( AND CONFIDENTIALLY BY A SERVICE REP AT A DEALER) THAT THE DESIGN OF THE GMC AND CHEVROLET EMERGENCY BRAKE SYSTEM IS POORLY DESIGNED AND WHETHE…
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THE EMERGENCY BRAKES ON MY TRUCK HAVE ONLY BEEN ACTUALLY USED 4-5 TIMES. THEY DO NOT HOLD AND I'M TOLD WILL NOT PASS MY ANNUAL SAFETY INSPECTION. I HAVE BEEN TOLD BY SEVERAL MECHANICS ( AND CONFIDENTIALLY BY A SERVICE REP AT A DEALER) THAT THE DESIGN OF THE GMC AND CHEVROLET EMERGENCY BRAKE SYSTEM IS POORLY DESIGNED AND WHETHER ENGAGED OR NOT , THE BRAKESHOES ARE CONTINOUSLY IN CONTACT W/THE DRUMS, CAUSING THEM TO WEAR OUT VERY QUICKLY - BECOMING COMPLETELY USELESS AND VERY EXPENSIVE TO REPARE AND REPLACE - NOT TO MENTION VERY DANGEROUS.
NHTSA ODI #10120328
27,000 miles · May 6, 2005
Service Brakes, Hydraulic
DT: ABS WAS NOT WORKING CORRECTLY. RECENTLY HAD NEW BRAKES PUT ON BY A DEALER, AND THIS IS NOT WORKING PROPERLY. WHEN APPLYING BRAKE PRESSURE YOU HEAR A GROWLING NOISE ,AND EXTENDED STOPPING DISTANCE. NO OTHER REPAIRS HAVE BEEN MADE, BUT HAS RETURNED TO THE DEALER, WHO STATED THERE WAS A PROBLEM WITH THE ABS SYSTEM. *AK
NHTSA ODI #10120067
51,900 miles · Jan 17, 2005
Service Brakes, Hydraulic
2001 GMC K1500 SIERRA, 52000 MILES COMING TO A STOP NEAR 0 MPH THE ABS BRAKES START PULSATING. THIS CAUSES THE TRUCK TO STOP A FEW FEET FURTHER FROM WHERE YOU EXPECT. THIS INTERMITTENT PROBLEM IS MORE SOLID WHEN THE FRONT WHEELS ARE TURNED (LIKE STOPPING AT AN INTERSECTION AROUND A BEND OR, TURNING INTO A PARKING SPACE). …
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2001 GMC K1500 SIERRA, 52000 MILES COMING TO A STOP NEAR 0 MPH THE ABS BRAKES START PULSATING. THIS CAUSES THE TRUCK TO STOP A FEW FEET FURTHER FROM WHERE YOU EXPECT. THIS INTERMITTENT PROBLEM IS MORE SOLID WHEN THE FRONT WHEELS ARE TURNED (LIKE STOPPING AT AN INTERSECTION AROUND A BEND OR, TURNING INTO A PARKING SPACE). *JB
NHTSA ODI #10106503
25,000 miles · Sep 27, 2004
Suspension
THE REAR END WAS REPLACED FOUR TIMES. VEHICLE STARTED TO SCREAM. AFTER TAKING IT TO THE DEALER IT WAS DISCOVERED THE REAR END WAS DEFECTIVE.*AK
NHTSA ODI #10094385
44,600 miles · Jul 7, 2004
Service Brakes, Hydraulic
MY 2001 GMC SIERRA 4X4 PICKUP WAS DESIGNED WITH THE REAR BRAKE CALIPERS INSTALLED ON THE FRONT OF THE ROTORS. ANY ROAD DEBRIS THROWN-UP BY THE FRONT WHEELS CAUSES THE REAR BRAKES TO MALFUNCTION. THE TRUCK HAS 44600 MILES ON IT. THE FRONT BRAKE PADS ARE IN EXCELLENT SHAPE. THE REAR PADS, ON THE OUTSIDE, ARE IN EXCELLENT SHAPE. TH…
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MY 2001 GMC SIERRA 4X4 PICKUP WAS DESIGNED WITH THE REAR BRAKE CALIPERS INSTALLED ON THE FRONT OF THE ROTORS. ANY ROAD DEBRIS THROWN-UP BY THE FRONT WHEELS CAUSES THE REAR BRAKES TO MALFUNCTION. THE TRUCK HAS 44600 MILES ON IT. THE FRONT BRAKE PADS ARE IN EXCELLENT SHAPE. THE REAR PADS, ON THE OUTSIDE, ARE IN EXCELLENT SHAPE. THE REAR PADS, ON THE INSIDE, ARE WORN TO THE METAL. I COMPLAINED ABOUT A NOISE IN THE REAR END WHILE IT WAS UNDER WARRANTY.THE REAR BRAKES ALWAYS HANG WHEN YOU STOP, THEN MAKE TWIN POPPING SOUNDS WHEN YOU START-OFF AGAIN. THE PROBLEM WAS NEVER FOUND OR FIXED. THIS IS NOT EASY TO DETECT AND COULD LEAD TO SEVERE BRAKE FAILURE. *AK
NHTSA ODI #10080506
80,000 miles · Mar 21, 2004
Parking Brake
PARKING BRAKE FAILURE. *JB
NHTSA ODI #10062736
8,695 miles · May 8, 2003
Electrical System
THE VEHICLE HAD AN ELECTRICAL SHORT WHICH CAUSED THE DOOR AJAR ALARM TO SOUND AND THE DASHBOARD GAUGES TO MALFUNCTION. *JB
NHTSA ODI #10019441
Mileage unknown · Mar 5, 2003
Power Train
THE VEHICLE EXPERIENCED REAR AXLE PROBLEMS. *AK *JB
NHTSA ODI #10009140
Mileage unknown · Sep 24, 2002
Parking Brake
CONSUMER STATES WHILE PARKED ON AN INCLINE, THE PARKING BRAKES FAILED TO HOLD, VEHICLE ROLLED FORWARD, PARKING BRAKES SHOES WERE WORN EXCESSIVELY, METAL TO METAL, CAUSING DAMAGE TO ROTOR.*JB
NHTSA ODI #8019256
Mileage unknown · May 21, 2002
Structure
TAILGATE WAS DOWN, 2 PERSONS WERE SITTING ON IT. TAILGATE CABLES BROKE ON BOTH SIDES, CAUSING TAILGATE TO FALL DOWN. NO INJURIES.*AK
ON CERTAIN VANS EQUIPPED WITH SURE-LOK WHEELCHAIR SECUREMENT SYSTEMS, THE SPROCKET TEETH OF THE RETRACTOR ASSEMBLY IS OUT OF ALIGNMENT.
Consequence & remedy
Consequence: IN THE EVENT OF A VEHICLE CRASH, THE WHEELCHAIR MAY NOT BE ADEQUATELY SECURED POSSIBLY RESULTING IN INJURIES TO A WHEELCHAIR OCCUPANT.
Remedy: DEALERS WILL INSPECT AND REPLACE THE WHEELCHAIR SECUREMENT RETRACTORS AS NECESSARY. SURE-LOK WILL HANDLE THE REPAIRS FOR THIS CAMPAIGN. OWNERS SHOULD CONTACT SURE-LOCK AT 1-908-231-1804 OR MOBILITYWORKS AT 1-800-769-8267.
VEHICLE DESCRIPTION: CERTAIN 2-WHEEL DRIVE PICKUP TRUCKS FAIL TO COMPLY WITH REQUIREMENTS OF FMVSS NO. 120, "TIRE SELECTION AND RIMS FOR MOTOR VEHICLES OTHER THAN PASSENGER CARS." THE PROBLEM WAS CAUSED BY A COMPUTER ERROR THAT RESULTED IN THE CERTIFICATION LABEL LISTING TIRE SIZE AND INFLATION PRESSURE INFORMATION THAT DIFFER FROM THE TIRE SIZE AND THE INFLATION PRESSURE INFORMATION FOR THE TIRES ON THE VEHICLE. IF THE VEHICLE OWNER OR SOMEONE SERVICING THE VEHICLE INFLATES THE TIRES ACCORDING TO THE PRESSURE SPECIFIED ON THE LABEL VERSUS THE APPROPRIATE PRESSURE FOR THE TIRES, THE TIRES COULD BE UNDER-INFLATED OR OVER-INFLATED DEPENDING ON THE TIRES MOUNTED ON THE VEHICLE.
Consequence & remedy
Consequence: IF THE TIRES ARE UNDER-INFLATED, IT COULD REDUCE THE TREAD LIFE OF THE TIRE, AND THE TIRE COULD DEGRADE TO A POINT OF ALLOWING SUDDEN AIR LOSS. IF THE TIRES ARE OVER-INFLATED, IT COULD REDUCE THE TREAD LIFE OF THE TIRE AND INCREASE SUSCEPTIBILITY TO ROAD HAZARD DAMAGE. IF SUDDEN AIR LOSS OR A ROAD HAZARD CAUSES DAMAGE TO A TIRE, CONTROL OF THE VEHICLE COULD BE ADVERSELY AFFECTED AND COULD RESULT IN A VEHICLE CRASH.
Remedy: OWNERS WILL BE PROVIDED WITH A NEW LABEL AND INSTALLATION INSTRUCTIONS. HOWEVER, A DEALER CAN INSTALL THE LABEL IF THE OWNER SO DESIRES. OWNER NOTIFICATION BEGAN MAY 31, 2001. OWNERS WHO DO NOT RECEIVE THE LABEL AND INSTALLATION INSTRUCTIONS WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020 OR GMC AT 1-800-462-8782.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
2
EA04011 · Parking Brake Failure
Opened Apr 9, 2004 · Closed May 10, 2005
Status: closed (inferred from source dates) · Parking Brake; Parking Brake:conventional; Parking Brake:conventional:mechanical; Parking Brake:conventional:mechanical:linkage And Cable
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
Additional source detail variants (4)
Parking Brake:conventional
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
Parking Brake:conventional:mechanical
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
Parking Brake:conventional:mechanical:linkage And Cable
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
Parking Brake
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
PE03057 · Parking Brake Failure
Opened Dec 8, 2003 · Closed Apr 9, 2004
Status: closed (inferred from source dates) · Parking Brake
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.
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