NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
222 reportsClear category filter124,000 miles · Oct 20, 2009
Service Brakes, Hydraulic
UNNECESSARY ABS ACTIVATION AT SLOW SPEED. ABS WHEEL SPEED SENSOR OUTPUT FOUND TO BE LOW. VEHICLE WAS PREVIOUSLY SERVICED BY DEALER (1/18/06) UNDER GM RECALL 05068. SERVICE CONSISTED OF 'REMOVING AND CLEANING ABS WHEEL SPEED SENSORS'. SUBSEQUENT FAILURE INDICATES THAT THE CORRECTIVE ACTION DOES NOT ADEQUATELY ADDRESS THE UNDERLYI…
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UNNECESSARY ABS ACTIVATION AT SLOW SPEED. ABS WHEEL SPEED SENSOR OUTPUT FOUND TO BE LOW. VEHICLE WAS PREVIOUSLY SERVICED BY DEALER (1/18/06) UNDER GM RECALL 05068. SERVICE CONSISTED OF 'REMOVING AND CLEANING ABS WHEEL SPEED SENSORS'. SUBSEQUENT FAILURE INDICATES THAT THE CORRECTIVE ACTION DOES NOT ADEQUATELY ADDRESS THE UNDERLYING DEFECT. *TR
NHTSA ODI #10289125
50,000 miles · Aug 8, 2009
Service Brakes, Hydraulic
WAS GETTING THE TRUCK INSPECTED AND THE BRAKES FAILED. THE GUY SAID THAT THE BRAKES WERE LOOSE AND HE HAD TO PUSH THE PEDAL ALL THE WAY TO THE FLOOR TO GET THE TRUCK TO STEP. HE ALSO NOTICES CORROSION AND BRAKE FLUID LEAKING. *TR
NHTSA ODI #10279749
122,846 miles · Jul 25, 2009
Service Brakes, Hydraulic
COMPLAINT INVOLVES A 1999 CHEVY SILVERADO 1500 4X4 ABS ACTIVATES AT LOW SPEEDS (TYPICAL <5 MPH). EXPERIENCED MULTIPLE NEAR-MISSES OF LOW SPEED CRASHES WHEN BRAKING; ONE INVOLVING A PEDESTRIAN. FAILURE OCCURS ON AVERAGE 1 OUT OF 2 TIMES WHEN BRAKING. BROUGHT VEHICLE TO GM DEALER - BALISE CHEVROLET/OLDSMOBILE, W. SPRINGFIELD, MA…
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COMPLAINT INVOLVES A 1999 CHEVY SILVERADO 1500 4X4 ABS ACTIVATES AT LOW SPEEDS (TYPICAL <5 MPH). EXPERIENCED MULTIPLE NEAR-MISSES OF LOW SPEED CRASHES WHEN BRAKING; ONE INVOLVING A PEDESTRIAN. FAILURE OCCURS ON AVERAGE 1 OUT OF 2 TIMES WHEN BRAKING. BROUGHT VEHICLE TO GM DEALER - BALISE CHEVROLET/OLDSMOBILE, W. SPRINGFIELD, MA - ON 7/16/09. VEHICLE MILEAGE WAS 122,846. THIS IS THE SAME DEALER FROM WHICH VEHICLE WAS PURCHASED ORIGINAL IN 1999. DEALER DIAGNOSED PROBLEM AS PROBABLE CORROSION AT BOTH FRONT SPEED SENSORS. RECOMMENDED CLEANING AND POSSIBLE REPLACEMENT OF BOTH SENSORS AT COST OF $234.25. I INFORMED DEALER THAT THIS WAS THE SAME PROBLEM THAT OCCURRED PRIOR TO RECALL 05068 (NHTSA CAMPAIGN ID NUMBER : 05V379000) WHERE BOTH FRONT WHEEL SPEED SENSORS WERE INSPECTED AND REPLACED AT 73,428 MILES ON 10/13/05. DEALER CHECKED VEHICLE RECORDS AND CONFIRMED. DEALER WAS ASKED TO REPAIR AT NO CHARGE BASED ON RECURRING PROBLEM BUT DECLINED. CONTACTED GM CUSTOMER ASSISTANCE ON 7/20/09 AND SPOKE WITH REPRESENTATIVE (SERVICE REPORT 71-742297566) WHO REITERATED THAT GM WOULD NOT REPAIR AT NO CHARGE BASED ON PRIOR REPLACEMENT OF PARTS UNDER LAST RECALL. SHE GAVE ME THE NAME OF THE GM MANAGER AT CHEVROLET TO WHOM WRITTEN COMPLAINTS SHOULD BE SENT. *TR
NHTSA ODI #10278271
143,000 miles · May 29, 2009
Service Brakes, Hydraulic
FOR THE PAST TWO WEEKS I'VE NOTICED THAT WHEN I APPLY PRESSURE TO THE BRAKES THE TRUCK DOES NOT STOP IMMEDIATELY. IT ROLLS A LITTLE AND IT SCARES ME BECAUSE I AM PRESSING THE BRAKE INTO THE FLOOR OF THE TRUCK WITH BOTH FEET. THIS IS HAPPENING EVERY TIME I DRIVE AND WITH THIS BEING THE ONLY TRANSPORTATION I HAVE, I HAVE TO CONTI…
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FOR THE PAST TWO WEEKS I'VE NOTICED THAT WHEN I APPLY PRESSURE TO THE BRAKES THE TRUCK DOES NOT STOP IMMEDIATELY. IT ROLLS A LITTLE AND IT SCARES ME BECAUSE I AM PRESSING THE BRAKE INTO THE FLOOR OF THE TRUCK WITH BOTH FEET. THIS IS HAPPENING EVERY TIME I DRIVE AND WITH THIS BEING THE ONLY TRANSPORTATION I HAVE, I HAVE TO CONTINUE TO DRIVE IT. I AM CURRENTLY CALLING AROUND FOR QUOTES AND NOTICE THAT THERE MAY BE A RECALL ON THIS PROBLEM BUT IT IS CURRENTLY BEING RESEARCHED BECAUSE OF RELATIONS TO THE PROBLEM BEING SALT CRYSTALS. EITHER WAY THIS NOT NORMAL WEAR AND TEAR. ITS A PROBLEM FOR CERTAIN CHEVY MODELS AND YEAR. I'VE BEEN INFORMED THAT IT MAY BE THE MASTER CYLINDER OR THE BOOSTER. EITHER WAY I NEED TO GET IT FIXED BUT IF THERE IS GOING TO BE A RECALL, IT NEEDS TO HAPPEN SOON. I HAVE BEEN QUOTED AN ESTIMATED PRICE OF AT LEAST $300. *TR
NHTSA ODI #10272379
73,000 miles · May 26, 2009
Parking BrakeService Brakes, Hydraulic
I HAVE A 1999 CHEVY SILVERADO. I HAVE HAD TO REPLACE THE BRAKE LINES DUE TO A RUPTURE AS I WAS COMING UPON A 4 WAY INTERSECTION. THANK GOD NOTHING WAS COMING AS I ROLLED THROUGH IT. I MADE IT HOME AND TO THE SHOP THE NEXT DAY AND HAD TO REPLACE ALL THE BRAKE LINES. I HAVE HAD TO REPLACE THE PARKING BRAKE PADS ON THE REAR WHI…
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I HAVE A 1999 CHEVY SILVERADO. I HAVE HAD TO REPLACE THE BRAKE LINES DUE TO A RUPTURE AS I WAS COMING UPON A 4 WAY INTERSECTION. THANK GOD NOTHING WAS COMING AS I ROLLED THROUGH IT. I MADE IT HOME AND TO THE SHOP THE NEXT DAY AND HAD TO REPLACE ALL THE BRAKE LINES. I HAVE HAD TO REPLACE THE PARKING BRAKE PADS ON THE REAR WHICH IS A RECALLED ITEM ON A TRUCK THAT HAS A MANUAL SHIFT TRANSMISSION. WHAT DOES THE TRANSMISSION HAVE TO DO WITH BRAKES? SHOULDN'T MATTER, JUST BECAUSE THERE HASN'T BEEN AN INCIDENT OF A ROLL AWAY WITH AN AUTOMATIC TRANSMISSION. SO WHY DO THEY INSPECT THE PARKING BRAKE IF YOU HAVE AN AUTOMATIC TRANSMISSION? BECAUSE IT IS AN EMERGENCY BRAKE! WITH THIS TRUCK YOU NEED IT. YOU CAN FIND MANY COMPLAINTS OF THE BRAKE LINES RUSTING OUT IN THE SAME YEAR AND MAKE AS MY TRUCK. THERE IS AN APPARENT PROBLEM WITH QUALITY AT GM AND THEY SHOULD BE HELD ACCOUNTABLE. *TR
NHTSA ODI #10269937
120,000 miles · Apr 27, 2009
Service Brakes, Hydraulic
BOTH ABS AND BRAKE LIGHTS ON DASH OF 1999 CHEVY SILVERADO 1500. LOW SPEED ABS ACTIVATION AT RANDOM NOT INCLUDED IN RECALL BECAUSE OF WHERE I LIVE???? *TR
NHTSA ODI #10266810
153,000 miles · Apr 14, 2009
Service Brakes, Hydraulic
VEHICLE IS HAVING ABS PROBLEMS. THERE WAS A RECALL (74013) ISSUED 8/29/05 WHICH ONLY COVERED VEHICLES IN CERTAIN STATES, NOT VIRGINIA. SINCE BRAKES ARE A SAFETY ISSUE IT SEEMS THAT IT SHOULD BE. I CALLED GM AND THEY INFORMED ME IT WAS NOT (71-716605105 CLAIM #). PROBLEM STARTED WITH ABS LIGHT COMING ON, TOOK TO REPAIR SHOP A…
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VEHICLE IS HAVING ABS PROBLEMS. THERE WAS A RECALL (74013) ISSUED 8/29/05 WHICH ONLY COVERED VEHICLES IN CERTAIN STATES, NOT VIRGINIA. SINCE BRAKES ARE A SAFETY ISSUE IT SEEMS THAT IT SHOULD BE. I CALLED GM AND THEY INFORMED ME IT WAS NOT (71-716605105 CLAIM #). PROBLEM STARTED WITH ABS LIGHT COMING ON, TOOK TO REPAIR SHOP AND WAS TOLD ABS UNIT & ECM UNIT NEEDED REPLACING (4/10/09). TOTAL BILL 1940.00. *TR
NHTSA ODI #10265232
93,644 miles · Mar 31, 2009
Service Brakes, Hydraulic
ABS BRAKES KICKING IN AT SLOW SPEEDS WHEN NOT NEEDED. NO LIGHTS ON DASH. NO WARNINGS WHEN IT WILL HAPPEN. USUALLY WHEN STOPPING AT CROSSWALKS,PARKING LOTS OR GAS STATIONS BY PUMP. PROBABLY TRIPLING STOPPING DISTANCE. I ALMOST HIT A BRICK WALL IN THE DEALERS PARKING LOT BUT A CURB STOP STOPPED ME LUCKILY IT WAS THERE. *TR
NHTSA ODI #10263785
44,000 miles · Feb 24, 2009
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE VEHICLE WAS PREVIOUSLY REPAIRED ACCORDING TO NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK), BUT THE FAILURE HAS RECURRED. THE ANTILOCK BRAKES ENGAGED AND THE STOPPING DISTANCE INCREASED. THE CONTACT TOOK THE VEHICLE TO THE DEALER AND THEY INFOR…
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TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE VEHICLE WAS PREVIOUSLY REPAIRED ACCORDING TO NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK), BUT THE FAILURE HAS RECURRED. THE ANTILOCK BRAKES ENGAGED AND THE STOPPING DISTANCE INCREASED. THE CONTACT TOOK THE VEHICLE TO THE DEALER AND THEY INFORMED HIM THAT THE RECALL REPAIR HAD BEEN PREVIOUSLY PERFORMED AND HE WOULD HAVE TO PAY FOR ANY ADDITIONAL REPAIRS. THE VIN WAS UNKNOWN. THE FAILURE MILEAGE WAS 44,000.
NHTSA ODI #10259765
61,420 miles · Feb 21, 2009
Service Brakes, HydraulicCrash
ABS FAILED, MOTOR KEPT RUNNING UNTIL THE FUSE WAS PULLED, WENT TO DEALER, I WAS TOLD REPAIRS WOULD COST $800-1100 FOR REPAIR. I WAS TOLD THERE WAS A RECALL IN THE ICE BELT STATES, BUT NOT IN THE SOUTH.. THE ABS FAILED AND CAUSED AN ACCIDENT, I WAS TRAVELING 35 MPH WITH A 1000 POUND TRAILER IN TOW, A VEHICLE SUDDENLY STOPPED IN…
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ABS FAILED, MOTOR KEPT RUNNING UNTIL THE FUSE WAS PULLED, WENT TO DEALER, I WAS TOLD REPAIRS WOULD COST $800-1100 FOR REPAIR. I WAS TOLD THERE WAS A RECALL IN THE ICE BELT STATES, BUT NOT IN THE SOUTH.. THE ABS FAILED AND CAUSED AN ACCIDENT, I WAS TRAVELING 35 MPH WITH A 1000 POUND TRAILER IN TOW, A VEHICLE SUDDENLY STOPPED IN FRONT OF ME AND I HIT HIM, MINOR DAMAGE $2500. MY POINT IS THE SOUTH HAS A HUMIDITY PROBLEM THAT CAUSES ELECTRICAL COMPONENTS TO FAIL, WE HAVE SALT AIR IN MOBILE, ALABAMA. THIS RECALL SHOULD BE FOR ALL NOT JUST THE ICE BELT C/K 1500 PICKUPS. *TR
NHTSA ODI #10259563
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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