NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
164 reportsClear category filter53,500 miles · Nov 21, 2011
Service Brakes, Hydraulic
I HAVE BEEN HAVING SEVERAL BRAKE ISSUES WITH MY TRUCK WITHIN THE LAST YEAR. MY LATEST PROBLEM HAS BEEN THE ABS ENGAGING AT A NEAR STOP AROUND 5 MPH. THIS HAPPENS SEVERAL TIMES WITHIN A SHORT TRIP. AFTER RESEARCHING THIS OVER THE INTERNET IT APPEARS TO BE A PROBLEM WITH QUITE A FEW CHEVY TRUCK OWNERS. I WORK FOR A MAJOR AUTO PART…
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I HAVE BEEN HAVING SEVERAL BRAKE ISSUES WITH MY TRUCK WITHIN THE LAST YEAR. MY LATEST PROBLEM HAS BEEN THE ABS ENGAGING AT A NEAR STOP AROUND 5 MPH. THIS HAPPENS SEVERAL TIMES WITHIN A SHORT TRIP. AFTER RESEARCHING THIS OVER THE INTERNET IT APPEARS TO BE A PROBLEM WITH QUITE A FEW CHEVY TRUCK OWNERS. I WORK FOR A MAJOR AUTO PARTS RETAILER AND HAVE ASKED SEVERAL MECHANICS OF A FIX OR SOLUTION. THERE SEEMS TO BE QUITE A FEW DIAGNOSIS MENTIONED. I WOULD JUST LIKE TO FIX MY TRUCK PROPERLY AND NOT HAVE TO WORRY ABOUT GETTING INTO AN ACCIDENT WITH MY WIFE AND KIDS IN THE TRUCK. *TR
NHTSA ODI #10436679
107,000 miles · Nov 14, 2011
Parking BrakeService Brakes, Hydraulic
THE PARKING BRAKE ON MY TRUCK WILL NOT HOLD AS IT SHOULD, THUS CAUSING VEHICLE TO ROLL DOWN DRIVEWAY. THERE IS A RECALL FOR SILVERADO'S WITH MANUAL TRANSMISSIONS,( DEFECT INVESTIGATION # EA04011 GM RECALL #05042 NHTSA CAMPAIGN ID# 05V161000) MINE IS A AUTOMATIC, BUT THE AUTO AND MANUAL USE THE SAME PARKING BRAKE SET-UP. I HAVE D…
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THE PARKING BRAKE ON MY TRUCK WILL NOT HOLD AS IT SHOULD, THUS CAUSING VEHICLE TO ROLL DOWN DRIVEWAY. THERE IS A RECALL FOR SILVERADO'S WITH MANUAL TRANSMISSIONS,( DEFECT INVESTIGATION # EA04011 GM RECALL #05042 NHTSA CAMPAIGN ID# 05V161000) MINE IS A AUTOMATIC, BUT THE AUTO AND MANUAL USE THE SAME PARKING BRAKE SET-UP. I HAVE DONE SOME READING ON-LINE CHEVROLET TRUCK FORUMS AND THERE ARE ALLOT OF SILVERADO/SUV GM OWNERS WITH AUTOMATICS THAT HAVE THIS SAME TYPE OF BRAKE SYSTEM THAT ARE HAVING THE SAME ISSUE, NOT HOLDING DUE TO PREMATURE WEAR OUT OF PARKING BRAKE SHOE LINING. THERE IS ALSO A GM TECH SERV BULL FOR THIS MATTER AS WELL, BUT NOT A RECALL FOR THE VEHICLES WITH AUTO TRANSMISSIONS, WHAT ARE THE OWNERS OF AUTOMATICS LESS IMPORTANT. THE TSB HAS THE DEALERS REPLACE THE SPRING RETAINER CLIP JUST AS THE RECALL DOES. I THINK THE TSB NEEDS TO TAKE A HARD LOOK AT THE PARKING BRAKE ISSUES ON THE TRUCKS/SUVS WITH AUTOMATIC TRANSMISSIONS AS WELL. *TR
NHTSA ODI #10435470
83,000 miles · Nov 11, 2011
Service Brakes, Hydraulic
ON 11/09/11 I BROUGHT MY TRUCK IN FOR STATE INSPECTION. TWO MINUTES AFTER GIVING THE KEYS TO THE MECHANIC, HE CAME BACK AND SAID THAT THE TRUCK HAD NO BRAKES. THE HYDRAULIC BRAKE LINE RUPTURED AS HE ATTEMPTED TO BRING THE TRUCK INTO THE GARAGE TO INSPECT. THE HYDRAULIC BRAKE LINES ARE ALL COMPLETELY RUSTED TO THE POINT THAT THEY…
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ON 11/09/11 I BROUGHT MY TRUCK IN FOR STATE INSPECTION. TWO MINUTES AFTER GIVING THE KEYS TO THE MECHANIC, HE CAME BACK AND SAID THAT THE TRUCK HAD NO BRAKES. THE HYDRAULIC BRAKE LINE RUPTURED AS HE ATTEMPTED TO BRING THE TRUCK INTO THE GARAGE TO INSPECT. THE HYDRAULIC BRAKE LINES ARE ALL COMPLETELY RUSTED TO THE POINT THAT THEY ALL NEED REPLACED. THIS IS A SERIOUS SAFETY ISSUE. NOT ONLY SHOULD THIS BE RECALLED AND REPAIRED AT GM'S EXPENSE,, MORE IMPORTANTLY THE MATERIAL THAT FUTURE HYDRAULIC BRAKE LINES ARE MADE OF, NEED TO BE REGULATED AS TO BE A RUST FREE MATERIAL. *TR
NHTSA ODI #10435265
99,000 miles · Nov 11, 2011
Service Brakes, Hydraulic
I AM HAVING PROBLEMS WITH MY 2002 CHEVY SILVERADO ANTI LOCK BRAKES. BRAKES ACTIVATE AT SPEEDS LOWER THAN 5 MILES AN HOUR, AND EXTENDS MY BRAKING DISTANCE, WHICH HAS ALMOST CAUSED SEVERAL ACCIDENTS. THIS IS THE SAME PROBLEM THAT IS OCCURRING UNDER RECALL BULLETIN 05068B, BUT MY VEHICLES VIN NUMBER IS NOT LISTED IN THE RECALL. CAN…
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I AM HAVING PROBLEMS WITH MY 2002 CHEVY SILVERADO ANTI LOCK BRAKES. BRAKES ACTIVATE AT SPEEDS LOWER THAN 5 MILES AN HOUR, AND EXTENDS MY BRAKING DISTANCE, WHICH HAS ALMOST CAUSED SEVERAL ACCIDENTS. THIS IS THE SAME PROBLEM THAT IS OCCURRING UNDER RECALL BULLETIN 05068B, BUT MY VEHICLES VIN NUMBER IS NOT LISTED IN THE RECALL. CAN THE RECALL BULLETIN BE REVISED TO INCLUDE MY VIN NUMBER, DUE TO MY VEHICLE IS EXPERIENCING THE SAME PROBLEMS? I HAVE SPOKE WITH CHVEY CORPORATE CUSTOMER SERVICE AND THE DEALERSHIP, ABOUT COVERING THE COST OF THE REPAIRS OR AT LEAST PARTIAL COST, BOTH REFUSE TO COVER ANYTHING BECAUSE THE VIN # IS NOT LISTED IN THE RECALL BULLETIN. *TR
NHTSA ODI #10435252
150,000 miles · Oct 29, 2011
Service Brakes, Hydraulic
MY SILVERADO PICKUP HAS HAD TWO PROBLEMS THAT CAUSED LOW-SPEED INAPPROPRIATE ACTIVATION OF THE ABS, LENGTHENING STOPPING DISTANCES. ONCE, ABOUT FIVE YEARS AGO, AND AGAIN THIS YEAR. ON BOTH OCCASIONS THE FRONT WHEEL BEARING HUBS HAD TO BE REPLACED TO REMEDY THE PROBLEM. THE BEARINGS ARE SEALED AND NOT SERVICEABLE, AND WHEN THEY W…
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MY SILVERADO PICKUP HAS HAD TWO PROBLEMS THAT CAUSED LOW-SPEED INAPPROPRIATE ACTIVATION OF THE ABS, LENGTHENING STOPPING DISTANCES. ONCE, ABOUT FIVE YEARS AGO, AND AGAIN THIS YEAR. ON BOTH OCCASIONS THE FRONT WHEEL BEARING HUBS HAD TO BE REPLACED TO REMEDY THE PROBLEM. THE BEARINGS ARE SEALED AND NOT SERVICEABLE, AND WHEN THEY WEAR THE AIR GAP UNDER THE ANTI-LOCK SENSOR STARTS VARYING, CAUSING ERRONEOUS SIGNALS TO THE ABS. THE FIRST SYMPTOM IS DANGEROUS APPLICATION OF THE ABS AT LOW SPEED. (I NEARLY HIT THE BUILDING I WAS APPROACHING WHILE PARKING.) *TR
NHTSA ODI #10433510
112,168 miles · Oct 18, 2011
Service Brakes, Hydraulic
2002 SILVERADO Z71 STOPPED FOR FUEL, STARTED TRUCK, PUT MY FOOT ON THE BRAKE TO PUT IN GEAR, PEDAL GOES ALMOST TO THE FLOOR, SLOWLY DROVE HOME. I HAD ALL THE BRAKE LINES REPLACED WITH STAINLESS STEEL LINES FROM CLASSIC TUBE, I HOPE YOU MANDATE THAT GM PAY FOR ALL REPAIRS WITH SUBMITTED BILLS AND $ 2000.00 IN COMPENSATION FO…
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2002 SILVERADO Z71 STOPPED FOR FUEL, STARTED TRUCK, PUT MY FOOT ON THE BRAKE TO PUT IN GEAR, PEDAL GOES ALMOST TO THE FLOOR, SLOWLY DROVE HOME. I HAD ALL THE BRAKE LINES REPLACED WITH STAINLESS STEEL LINES FROM CLASSIC TUBE, I HOPE YOU MANDATE THAT GM PAY FOR ALL REPAIRS WITH SUBMITTED BILLS AND $ 2000.00 IN COMPENSATION FOR THE AGGRAVATION. *TR
NHTSA ODI #10430609
96,457 miles · Oct 12, 2011
Service Brakes, Hydraulic
AFTER LEAVING MY HOUSE I ATTEMPTED TO STOP AT THE END OF MY STREET ONLY TO FIND THAT MY BRAKES HAD FAILED! I TURNED AROUND AT THE NEXT STREET TO RETURN HOME. I HAD ABOUT 20% BRAKE FUNCTION SO I DROVE AT ABOUT 5 MILES PER HOUR. ON MY RETURN HOME A LITTLE DOG RAN OUT IN FRONT OF MY TRUCK, I WAS UNABLE TO STOP AND CONSEQUENTL…
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AFTER LEAVING MY HOUSE I ATTEMPTED TO STOP AT THE END OF MY STREET ONLY TO FIND THAT MY BRAKES HAD FAILED! I TURNED AROUND AT THE NEXT STREET TO RETURN HOME. I HAD ABOUT 20% BRAKE FUNCTION SO I DROVE AT ABOUT 5 MILES PER HOUR. ON MY RETURN HOME A LITTLE DOG RAN OUT IN FRONT OF MY TRUCK, I WAS UNABLE TO STOP AND CONSEQUENTLY RAN OVER HER. SHE DIED IMMEDIATELY, I FELT HORRIBLE. THE EMERGENCY BRAKE WAS APPLIED BUT TOO LATE! THE TRUCK HAS A STAINLESS STEEL EXHAUST SYSTEM BUT RUSTY BRAKE LINES (POOR ENGINEERING OR COST PLANNING?). INCIDENTALLY I WAS ON MY WAY TO I-75 WHERE I WOULD OF BEEN TRAVELING AT 70 MILES PER HOUR. IF THE FAILURE HAD OCCURRED THEN, WHO KNOWS WHAT WOULD OF HAPPENED? I ALSO HAVE A 1997 BLAZER THAT LOST ITS BRAKES DUE TO BRAKE LINE RUST AND FLUID LEAKAGE. THIS HAPPENED AT 55 MILES PER HOUR, BUT I WAS LEFT WITH APPROXIMATELY 50% BRAKING POWER. THE DIFFERENCE IN BRAKING CAPACITY AFTER FAILURE WAS DRAMATIC. ALSO THERE WAS NO WARNING LIGHT ILLUMINATED DURING AND AFTER THE EVENT. IT ONLY CAME ON AFTER THE TRUCK WAS STOPPED AND RESTARTED. *TR *KB
NHTSA ODI #10429649
52,000 miles · Oct 11, 2011
Service Brakes, Hydraulic
BRAKE LINE FAILURE DUE TO EXCESSIVE RUST AND CORROSION. LUCKILY I WAS ON A SIDE STREET DIVING SLOW AND APPROACHING A STOP SIGN. WHEN I WENT TO STOP THE PEDAL WENT TO THE FLOOR. I HAD TO USE THE E-BRAKE TO STOP AND BRAKE FLUID WAS POURING OUT THE BOTTOM OF THE TRUCK FROM A VERY RUSTED AND BROKEN BRAKE LINE. WHY WON'T GM DO ANYTHI…
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BRAKE LINE FAILURE DUE TO EXCESSIVE RUST AND CORROSION. LUCKILY I WAS ON A SIDE STREET DIVING SLOW AND APPROACHING A STOP SIGN. WHEN I WENT TO STOP THE PEDAL WENT TO THE FLOOR. I HAD TO USE THE E-BRAKE TO STOP AND BRAKE FLUID WAS POURING OUT THE BOTTOM OF THE TRUCK FROM A VERY RUSTED AND BROKEN BRAKE LINE. WHY WON'T GM DO ANYTHING ABOUT THIS???????? *TR *KB
NHTSA ODI #10429447
80,000 miles · Oct 11, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 10 MPH DOWNHILL WHEN FORCE WAS APPLIED REPEATEDLY TO THE BRAKE HOWEVER, THE VEHICLE CONTINUED TO ACCELERATE. UPON ENGAGING THE EMERGENCY BRAKE THE VEHICLE CAME TO A STOP. THE CONTACT INSPECTED THE VEHICLE AND DETECTED BRAKE FLUID LEAKAGE.…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 10 MPH DOWNHILL WHEN FORCE WAS APPLIED REPEATEDLY TO THE BRAKE HOWEVER, THE VEHICLE CONTINUED TO ACCELERATE. UPON ENGAGING THE EMERGENCY BRAKE THE VEHICLE CAME TO A STOP. THE CONTACT INSPECTED THE VEHICLE AND DETECTED BRAKE FLUID LEAKAGE. IN ADDITION, THERE WAS RUST CORROSION WITHIN THE BRAKE LINES. THE CONTACT PLANNED TO NOTIFY THE MANUFACTURER REGARDING THE DEFECT. THE APPROXIMATE FAILURE MILEAGE WAS 80,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10429433
78,300 miles · Sep 20, 2011
Service Brakes, HydraulicCrash
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING 8 MPH, SHE APPLIED THE BRAKES BUT THE VEHICLE DID NOT STOP UNTIL CRASHING IN HER FRONT YARD. THE CRASH WAS MINOR AND THE VEHICLE WAS TAKEN TO AN INDEPENDENT REPAIR SHOP WHERE THE CONTACT WAS INFORMED THAT SOME OF THE BRAKING SENSORS WOULD…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING 8 MPH, SHE APPLIED THE BRAKES BUT THE VEHICLE DID NOT STOP UNTIL CRASHING IN HER FRONT YARD. THE CRASH WAS MINOR AND THE VEHICLE WAS TAKEN TO AN INDEPENDENT REPAIR SHOP WHERE THE CONTACT WAS INFORMED THAT SOME OF THE BRAKING SENSORS WOULD NEED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE BUT OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS 78,300. THE VIN WAS NOT AVAILABLE.
NHTSA ODI #10426428
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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