NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
181 reports63,000 miles · Aug 15, 2012
Fuel/propulsion System
TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THE FUEL LEVEL GAUGE FAILED AND WAS PROVIDING INCORRECT FUEL LEVEL READING. THE FAILURE CAUSED THE CONTACT THE RUN OUT OF FUEL WHILE DRIVING. THE VIN WAS NOT AVAILABLE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FA…
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TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THE FUEL LEVEL GAUGE FAILED AND WAS PROVIDING INCORRECT FUEL LEVEL READING. THE FAILURE CAUSED THE CONTACT THE RUN OUT OF FUEL WHILE DRIVING. THE VIN WAS NOT AVAILABLE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 63,000 AND THE APPROXIMATE CURRENT MILEAGE WAS 64,000.
NHTSA ODI #10470784
71,295 miles · Aug 4, 2012
Service Brakes
PULLING ON THE IN FRONT OF MY HOME , NO BRAKES USE THE PARKING BRAKE. LOOK UNDER THE SIERRA ON THE DRIVER SIDE LEAKING BRAKE FLUID. CORROSION ON BRAKE LINE,71,295 MILES ON THE SIERRA. *TR
NHTSA ODI #10469201
89,602 miles · Jun 24, 2012
Service Brakes
AS I WAS DRIVING , I HAD NO NOTICE OF PULLING INTO SUPERMARKET OF COMPLETE BRAKE FAILURE, FOUND OUT I HAVE MULTIPLE LEAKS AND PIN HOLES IN MY BRAKE LINES UNDERNEATH AND EXTENSIVE RUSTING ON MY VEHICLE, THIS IS COMPLETELY UNACCEPTABLE. *TR
NHTSA ODI #10462899
100,791 miles · May 4, 2012
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING 50 MPH, THE BRAKE PEDAL WAS APPLIED AND BECAME STUCK TO THE FLOORBOARD ABNORMALLY. THE CONTACT WAS ABLE TO CONTROL THE VEHICLE IN ORDER TO AVOID CRASHING INTO A PRECEDING VEHICLE. THE CONTACT DROVE THE VEHICLE HOME, INSPECTED THE BRAKE SYSTEM AND…
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TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING 50 MPH, THE BRAKE PEDAL WAS APPLIED AND BECAME STUCK TO THE FLOORBOARD ABNORMALLY. THE CONTACT WAS ABLE TO CONTROL THE VEHICLE IN ORDER TO AVOID CRASHING INTO A PRECEDING VEHICLE. THE CONTACT DROVE THE VEHICLE HOME, INSPECTED THE BRAKE SYSTEM AND DISCOVERED THAT SEVERAL BRAKE LINES WERE CORRODED. ONE OF THE BRAKE LINES WAS REPLACED A FEW YEARS PRIOR TO THE MOST RECENT FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGES WERE 100,791.
NHTSA ODI #10457464
90,000 miles · Apr 9, 2012
Power TrainStructureSuspension
WHILE TRYING TO SELL MY VEHICLE, AN AUTO SERVICE FACILITY DISCOVERED SERIOUS FRAME CORROSION WHICH COULD PROVE TO BE A SAFETY ISSUE. THE CORROSION SEEMS EXCESSIVE AND SUGGESTS DESIGN AND/OR MATERIAL DEFICIENCIES. I HAVE HAD TO REPLACE ALL BRAKE LINES AND HAVE HAD TRANSMISSION SHIFT LINKAGE FAILURE, ALL DUE TO RUST. ALSO, EXCE…
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WHILE TRYING TO SELL MY VEHICLE, AN AUTO SERVICE FACILITY DISCOVERED SERIOUS FRAME CORROSION WHICH COULD PROVE TO BE A SAFETY ISSUE. THE CORROSION SEEMS EXCESSIVE AND SUGGESTS DESIGN AND/OR MATERIAL DEFICIENCIES. I HAVE HAD TO REPLACE ALL BRAKE LINES AND HAVE HAD TRANSMISSION SHIFT LINKAGE FAILURE, ALL DUE TO RUST. ALSO, EXCESSIVE BODY RUST IN THE LOWER ROCKER PANELS HAS OCCURRED, MORE OF A COSMETIC PROBLEM, BUT INDICATIVE OF THE PERVASIVE RUST PROBLEM THAT EXISTS. *TR
NHTSA ODI #10454602
Mileage unknown · Mar 14, 2012
Service Brakes, Hydraulic
I WAS DRIVING IN MEDIUM TRAFFIC WHEN A VEHICLE IN FRONT OF ME STOPPED QUICKLY AND I APPLIED MY BRAKES. THEN I NOTICED THE PEDDLE GO DOWN TO THE FLOOR. THAT WAS THE ONLY WARNING I RECEIVED AND SO I IMMEDIATELY DROVE HOME PUMPING MY BRAKES WHEN I NEEDED TO STOP AND TRIED TO STOP INFREQUENTLY AS POSSIBLE. *TR
NHTSA ODI #10451581
137,900 miles · Feb 29, 2012
Power Train
ON FEBRUARY 15, 2012 AT APPROXIMATELY 11:00AM, DRIVING DOWN A TWO LANE PAVED HIGHWAY, THE CROSS PIN IN THE REAR DIFFERENTIAL GEAR HOUSING FAILED AND PARTS OF IT FELL INTO THE GEARS CAUSING THE REAR TIRES TO LOCK UP AND THE VEHICLE TO SKID OUT OF CONTROL INTO THE ONCOMING TRAFFIC LANE. LUCKILY, ONCOMING TRAFFIC WAS ABLE TO STOP I…
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ON FEBRUARY 15, 2012 AT APPROXIMATELY 11:00AM, DRIVING DOWN A TWO LANE PAVED HIGHWAY, THE CROSS PIN IN THE REAR DIFFERENTIAL GEAR HOUSING FAILED AND PARTS OF IT FELL INTO THE GEARS CAUSING THE REAR TIRES TO LOCK UP AND THE VEHICLE TO SKID OUT OF CONTROL INTO THE ONCOMING TRAFFIC LANE. LUCKILY, ONCOMING TRAFFIC WAS ABLE TO STOP IN TIME AVOIDING AN ACCIDENT. THIS WAS VERIFIED BY AMERICAN COLLISION IN RUTLAND, VT AS THE CAUSE OF THE FAILURE.
NHTSA ODI #10450900
34,000 miles · Dec 18, 2011
Service Brakes, Hydraulic
THE 1ST PROB LEFT REAR BRAKE LINE BROKE. 2ND PROB 37000 MI HAD TO REPLACE ALL ROTORS AND PADS BECAUSE ROTORS RUSTED AND CHEWED UP PADS,ALSO REPLACED 1 CALIPER AND BRAKE LINE. 3RD PROB 10/11 42115 MI OTHER REAR BRAKE LINE BROKE. 4RTH PROB 12/11 42450MI BRAKE LINE TO THE PROPORTIONING VALVE BROKE. THE FIRST PROB I WAS ROLLING TO …
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THE 1ST PROB LEFT REAR BRAKE LINE BROKE. 2ND PROB 37000 MI HAD TO REPLACE ALL ROTORS AND PADS BECAUSE ROTORS RUSTED AND CHEWED UP PADS,ALSO REPLACED 1 CALIPER AND BRAKE LINE. 3RD PROB 10/11 42115 MI OTHER REAR BRAKE LINE BROKE. 4RTH PROB 12/11 42450MI BRAKE LINE TO THE PROPORTIONING VALVE BROKE. THE FIRST PROB I WAS ROLLING TO A STOP @ A STOP SIGN. THE 3RD AND 4RTH PROB HAPPENED IN MY DRIVEWAY. IT SHOULD BE A CRIME TO PUT PEOPLES LIVES IN DANGER BECAUSE OF INFERIOR MATERIALS.
NHTSA ODI #10440768
116,000 miles · Nov 13, 2011
Service Brakes, Hydraulic
THANK GOODNESS NO ONE WAS HURT, AND NO VEHICLE HIT WHEN MY BRAKE LINES BURST ON THIS VEHICLE. WHEN REPAIRED THE MECHANIC SAID THEY BASICALLY ROTTED OFF FROM RUST AND THAT THIS IS A VERY COMMON PROBLEM ON THESE VEHICLES. I UNDERSTAND SOME MAINTENANCE IS NORMAL ON ANY TRUCK, BUT BEING ABLE TO USE YOUR FINGERS TO CRUMBLE PARTS OF…
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THANK GOODNESS NO ONE WAS HURT, AND NO VEHICLE HIT WHEN MY BRAKE LINES BURST ON THIS VEHICLE. WHEN REPAIRED THE MECHANIC SAID THEY BASICALLY ROTTED OFF FROM RUST AND THAT THIS IS A VERY COMMON PROBLEM ON THESE VEHICLES. I UNDERSTAND SOME MAINTENANCE IS NORMAL ON ANY TRUCK, BUT BEING ABLE TO USE YOUR FINGERS TO CRUMBLE PARTS OF THE BRAKE LINE IS NOT. YOU NEED TO INVESTIGATE THIS BEFORE PEOPLE ARE HURT OR KILLED, IF SOME HAVEN'T BEEN ALREADY. YOU ALSO NEED TO REVISIT THE ABS SENSOR PROBLEM FROM THE PREVIOUS RECALL. THAT FIX DID NOT WORK, SO ALL I COULD DO IS DISCONNECT THEM OR CHANCE AN ACCIDENT!!!!!!!!!! *TR
NHTSA ODI #10435392
85,000 miles · Nov 10, 2011
Service Brakes, HydraulicStructureSuspension
RUST- HAD TO REPLACE ALL THE BRAKE LINES,ROCKER PANELS AND CAB CORNERS,GAS TANK STRAPS RUSTED OUT AND BROKE OFF .BOTH SPRING SHACKLES BROKE FROM RUST AND HAD TO BE REPLACED,THE FRAME HAD TO BE FIXED(CRACKED) AND NOW THE SHOCK MOUNTS HAVE RUSTED OFF AND HAVE TO BE FIXED AND ITS ONLY GOT 115,000 MILES. *TR
NHTSA ODI #10435171
NHTSA investigations
2EA04011 · 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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