NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
147 reportsClear category filter25 miles · Mar 15, 2007
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. ON SEVERAL OCCASIONS WHILE DRIVING AT SLOW SPEEDS THE BRAKE PEDAL MADE COMPLETE CONTACT WITH THE FLOOR. THE CONTACT HAD TO ENGAGE THE BRAKES A COUPLE OF TIMES TO SLOW THE VEHICLE DOWN. ALSO, THERE WAS NOISE. THE FAILURE MILEAGE WAS 25 MPH. THERE WAS SNOW ON THE GROUND…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. ON SEVERAL OCCASIONS WHILE DRIVING AT SLOW SPEEDS THE BRAKE PEDAL MADE COMPLETE CONTACT WITH THE FLOOR. THE CONTACT HAD TO ENGAGE THE BRAKES A COUPLE OF TIMES TO SLOW THE VEHICLE DOWN. ALSO, THERE WAS NOISE. THE FAILURE MILEAGE WAS 25 MPH. THERE WAS SNOW ON THE GROUND AT THE TIME OF THE FAILURE. THE MECHANIC STATED THAT THE REAR ROTORS WERE WORN OUT, AND HAD TO BE REPLACED. THE CURRENT MILEAGE WAS 49,000. *AK UPDATE 4/25/07*TR
NHTSA ODI #10185194
52,000 miles · Mar 15, 2007
Parking BrakeService Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT HEARD A SCRAPPING NOISE IN THE VEHICLE. RECALL CAMPAIGN# 05V161000 WAS RELATED TO THE PARKING BRAKE FAILURE. THE FAILURE MILEAGE WAS 52,000. IN OCTOBER 2006 THE DEALER STATED THAT THE RECALL WAS NOT RELATED TO THIS VEHICLE DUE TO THE BRAKE PADS AND ROTORS…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT HEARD A SCRAPPING NOISE IN THE VEHICLE. RECALL CAMPAIGN# 05V161000 WAS RELATED TO THE PARKING BRAKE FAILURE. THE FAILURE MILEAGE WAS 52,000. IN OCTOBER 2006 THE DEALER STATED THAT THE RECALL WAS NOT RELATED TO THIS VEHICLE DUE TO THE BRAKE PADS AND ROTORS BEING WORN. *AK THE CURRENT MILEAGE WAS 61610. UPDATE *4/23/07 **TR
NHTSA ODI #10185183
15,000 miles · Mar 14, 2007
Service Brakes, Hydraulic
ANTI-LOCK BRAKES DO NOT WORK PROPERLY. IF I AM GOING SLOW AND NEED TO STOP FAST THE BRAKES ARE LIKE I AM ON ICE. I HAVE ROLLED INTO SEVERAL RED LIGHTS. IF I AM ON ROUGH ROAD THEY DO NOT WORK CORRECTLY. *JB
NHTSA ODI #10185032
104,000 miles · Mar 5, 2007
Service Brakes, Hydraulic
I HAD A RECALL THAT WAS SUPPOSED TO OF BEEN FIXED BUT NOW THEY ARE NOT WORKING CORRECTLY AND I ALMOST HAD A MAJOR ACCIDENT. I HAVE A 2001 CHEVY SILVERADO PICKUP AND THE ABS SENSORS LOCK UP THE BRAKES FOR NO REASON . THEY SAY THEY FIXED THE RECALL AWHILE BACK WHICH I DO NOT BELIEVE . THIS IS A VERY SERIOUS PROBLEM . I AM JUST WAI…
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I HAD A RECALL THAT WAS SUPPOSED TO OF BEEN FIXED BUT NOW THEY ARE NOT WORKING CORRECTLY AND I ALMOST HAD A MAJOR ACCIDENT. I HAVE A 2001 CHEVY SILVERADO PICKUP AND THE ABS SENSORS LOCK UP THE BRAKES FOR NO REASON . THEY SAY THEY FIXED THE RECALL AWHILE BACK WHICH I DO NOT BELIEVE . THIS IS A VERY SERIOUS PROBLEM . I AM JUST WAITING FOR THE LAWSUITS TO HIT GM . I ALMOST CRASHED THOUGH A FRONT GLASS WINDOW PANE STORE FRONT . IF I HAD HEART PROBLEMS I WOULD HAVE PROBABLY HAD A HEART ATTACK ! THIS IS A SERIOUS, SERIOUS PROBLEM . *JB
NHTSA ODI #10184237
53,500 miles · Aug 16, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED WHILE DRIVING 60 MPH, THE ABS LIGHT AND BOTH BRAKE LIGHTS ILLUMINATED. WHEN THE VEHICLE WAS SHUT OFF, THERE WAS A NOISE THAT SOUNDED LIKE A FAN RUNNING. A PRIVATE MECHANIC WAS CONSULTED, WHO INFORMED THE CONTACT THAT THE NOISE WAS DUE TO THE ABS PUMP RUNNING CONTINUOUSLY, AND THAT THE ABS MODULE NEEDED…
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DT*: THE CONTACT STATED WHILE DRIVING 60 MPH, THE ABS LIGHT AND BOTH BRAKE LIGHTS ILLUMINATED. WHEN THE VEHICLE WAS SHUT OFF, THERE WAS A NOISE THAT SOUNDED LIKE A FAN RUNNING. A PRIVATE MECHANIC WAS CONSULTED, WHO INFORMED THE CONTACT THAT THE NOISE WAS DUE TO THE ABS PUMP RUNNING CONTINUOUSLY, AND THAT THE ABS MODULE NEEDED TO BE REPLACED.
NHTSA ODI #10165614
80,000 miles · Aug 8, 2006
Service Brakes, HydraulicCrash
BRAKES ON MY 2001 CHEVY SILVERADO HAVE NEVER BEEN VERY GOOD. THEY HAVE DEGRADED TO THE POINT THAT THE VEHICLE CAN NOT RELIABLY STOP WITH REASONABLE BRAKING DISTANCES. MANY NEAR ACCIDENTS HAVE HAPPENED AND ONE CRASH WHERE BRAKES COULD HAVE CONTRIBUTED TO THE ACCIDENT. THE BRAKES HAVE BEEN SERVICED WITH PAD REPLACEMENT, ROTORS …
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BRAKES ON MY 2001 CHEVY SILVERADO HAVE NEVER BEEN VERY GOOD. THEY HAVE DEGRADED TO THE POINT THAT THE VEHICLE CAN NOT RELIABLY STOP WITH REASONABLE BRAKING DISTANCES. MANY NEAR ACCIDENTS HAVE HAPPENED AND ONE CRASH WHERE BRAKES COULD HAVE CONTRIBUTED TO THE ACCIDENT. THE BRAKES HAVE BEEN SERVICED WITH PAD REPLACEMENT, ROTORS MACHINED/REPLACED BRAKES BLED, MASTER CYLINDER REPLACED AND NOTHING HAS MADE THE BRAKES FUNCTION WELL. PLEASE NOTE THE INCIDENT DATE CAN BE LOOKED UP BUT THIS IS AN ESTIMATED DATE REPORTED HERE. *NM
NHTSA ODI #10164977
Mileage unknown · Jun 16, 2006
Service Brakes, Hydraulic
THE ABS ON MY 2001 CHEVY SILVERADO STEPSIDE (EXTENDED CAB) KICKS IN AT LOW SPEED STOPS. I HAVE COME CLOSE TO HITTING THINGS IN THE PAST BECAUSE IT HINDERS THE TRUCK'S STOPPING CAPABILITIES. I HAVE COMPLAINED TO MY DEALERSHIP IN THE PAST, BUT NO CODES EVER SHOW UP ON THE COMPUTER. FOR WHATEVER REASON, NO INFO ABOUT MY BRAKE CO…
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THE ABS ON MY 2001 CHEVY SILVERADO STEPSIDE (EXTENDED CAB) KICKS IN AT LOW SPEED STOPS. I HAVE COME CLOSE TO HITTING THINGS IN THE PAST BECAUSE IT HINDERS THE TRUCK'S STOPPING CAPABILITIES. I HAVE COMPLAINED TO MY DEALERSHIP IN THE PAST, BUT NO CODES EVER SHOW UP ON THE COMPUTER. FOR WHATEVER REASON, NO INFO ABOUT MY BRAKE COMPLAINTS WAS EVER ENTERED ON MY RECORDS. THE TRUCK HAS DONE THIS SINCE THE FIRST MONTH I HAD IT (I BOUGHT IT BRAND NEW). I FINALLY FOUND OUT THAT THERE WAS A RECALL FOR THIS PROBLEM, BUT NOT FOR THE SOUTH. I CALLED CHEVROLET AND ASKED ABOUT THE RECALL AND WAS TOLD THAT MY TRUCK HAD TOO MANY MILES NOW TO DO ANYTHING ABOUT IT AND THAT THE RECALL WASN'T FOR MY AREA AND THAT SINCE IT WASN'T ON MY SERVICE RECORDS THERE WASN'T ANYTHING THAT COULD BE DONE. DO I HAVE ANY RECOURSE IN THIS MATTER (MY TRUCK JUST TURNED 101K MILES)? *NM
NHTSA ODI #10160059
56,000 miles · Jun 4, 2006
Electrical SystemEquipmentParking Brake
BRAKE ROTORS CORRODED COMPLETELY , EMERGENCY BRAKE RUSTED COMPLETELY , MASSIVE RUST UNDER TRUCK , BRAKE CALIPERS RUSTED , POWER STEERING WENT OUT ,A.C. FAN WENT OUT, SHORT IN WIRING IN DOOR LOCKS AND WINDOWS, THIS A 2001, 56,000, MILES, LOW MILEAGE TRUCK TO HAVE SO MANY PROBLEMS, THE DEALERSHIP SAID THEY HAD NOT SEEN THIS PROB…
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BRAKE ROTORS CORRODED COMPLETELY , EMERGENCY BRAKE RUSTED COMPLETELY , MASSIVE RUST UNDER TRUCK , BRAKE CALIPERS RUSTED , POWER STEERING WENT OUT ,A.C. FAN WENT OUT, SHORT IN WIRING IN DOOR LOCKS AND WINDOWS, THIS A 2001, 56,000, MILES, LOW MILEAGE TRUCK TO HAVE SO MANY PROBLEMS, THE DEALERSHIP SAID THEY HAD NOT SEEN THIS PROBLEM BEFORE, I LOOKED IT UP, THERE IS RUSTING AND TOTAL CORROSION OF THE BRAKE ROTORS IN MANY DIFFERENT STATES, OVER ALONG PERIOD OF TIME, EVEN WHEN THE ROTORS ARE REPLACED THEY ARE RUSTING COMPLETELY AGAIN. CHEVY IS SELLING AN EXPENSIVE TRUCK, AND THEN PROFITING AGAIN ON THE REPLACEMENT OF THE DEFECTIVE PARTS, AND MAKING A PREMIUM PROFIT ON THAT TOO.! THEY ARE NOT BOTHERING TO FIX A DEFECT THAT HAS BEEN GOING ON FOR A LONG TIME. VERY DISGUSTED WITH THE CHEVY SILVERADO, MY FIRST AND LAST CHEVY. *NM
NHTSA ODI #10158960
95,000 miles · Apr 18, 2006
Service Brakes, Hydraulic
OWN A 2001 CHEVROLET SILVERADO EXTENDED CAB TRUCK. RECENTLY RECEIVED A RECALL NOTICE CONCERNING THE ANTI-LOCK BRAKE FAILURES. AFTER TAKING THE VEHICLE TO THE DEALER FOR THE RECOMMENDED SERVICE (UNDER THE RECALL), I STARTED EXPERIENCING BRAKING FAILURES AT SLOW SPEEDS. I HAVE NOT BEEN BACK THREE TIMES AND THE DEALER IS UN-ABLE…
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OWN A 2001 CHEVROLET SILVERADO EXTENDED CAB TRUCK. RECENTLY RECEIVED A RECALL NOTICE CONCERNING THE ANTI-LOCK BRAKE FAILURES. AFTER TAKING THE VEHICLE TO THE DEALER FOR THE RECOMMENDED SERVICE (UNDER THE RECALL), I STARTED EXPERIENCING BRAKING FAILURES AT SLOW SPEEDS. I HAVE NOT BEEN BACK THREE TIMES AND THE DEALER IS UN-ABLE TO RESOLVE. *JB
NHTSA ODI #10155562
60,000 miles · Jan 14, 2006
Service Brakes, Hydraulic
ANTI- LOCK BRAKES ENGAGING WHEN NOT NEEDED. *JB
NHTSA ODI #10147768
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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