NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
237 reportsClear category filter119,500 miles · Jul 19, 2010
Service Brakes, HydraulicCrash
2000 CHEVY SILVERADO - UNWANTED ABS ACTIVATION. ATTEMPTED TO STOP ON A DECLINING DRIVEWAY - ABS CAME ON - EST. GOING SLOW BETWEEN +/- 4-10 MPH. VEHICLE DID NOT STOP AND CRASHED INTO BACK OF PARKED CAR CAUSING SIGNIFICANT DAMAGE (~$2K) TO CAR. TRUCK CONTINUES TO HAVE ABS STOPPING FAILURE AT SLOW SPEEDS. WAS PART OF RECALL IN 200…
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2000 CHEVY SILVERADO - UNWANTED ABS ACTIVATION. ATTEMPTED TO STOP ON A DECLINING DRIVEWAY - ABS CAME ON - EST. GOING SLOW BETWEEN +/- 4-10 MPH. VEHICLE DID NOT STOP AND CRASHED INTO BACK OF PARKED CAR CAUSING SIGNIFICANT DAMAGE (~$2K) TO CAR. TRUCK CONTINUES TO HAVE ABS STOPPING FAILURE AT SLOW SPEEDS. WAS PART OF RECALL IN 2006; 'CORRECTED' BY DEALER. CONCERN 'CORRECTION' DID NOT FIX ISSUE. TRUCK DRIVEN DAILY (NO CHOICE) ... CONCERNED WITH SAFETY. *TR
NHTSA ODI #10343999
115,000 miles · Jul 14, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WHEN BRAKING FROM VARIOUS SPEEDS, THE ANTI-LOCK BRAKING SYSTEM INDEPENDENTLY WOULD ENGAGE AND THE BRAKE PEDAL AND FRONT OF THE VEHICLE WOULD VIBRATE EXCESSIVELY. THE CONTACT WAS ABLE TO LOCATE A RECALL FOR THE FAILURE AND INQUIRED WITH THE MANUFACTURER ABOUT NHTSA…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WHEN BRAKING FROM VARIOUS SPEEDS, THE ANTI-LOCK BRAKING SYSTEM INDEPENDENTLY WOULD ENGAGE AND THE BRAKE PEDAL AND FRONT OF THE VEHICLE WOULD VIBRATE EXCESSIVELY. THE CONTACT WAS ABLE TO LOCATE A RECALL FOR THE FAILURE AND INQUIRED WITH THE MANUFACTURER ABOUT NHTSA RECALL CAMPAIGN ID NUMBER: 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE MANUFACTURER ADVISED HIS VIN WAS NOT INCLUDED IN THE RECALL. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 115,000 AND THE CURRENT MILEAGE WAS 130,000.
NHTSA ODI #10343161
114,000 miles · Jul 12, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 5 MPH THE BRAKES WERE APPLIED AND THE VEHICLE EXPERIENCED AN INCREASE IN STOPPING DISTANCE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO STATED THAT THEY WERE UNABLE TO DIAGNOSE THE FAILURE. THE FAILURE CONTINUED TO OCCUR WHENEVER THE BRAK…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 5 MPH THE BRAKES WERE APPLIED AND THE VEHICLE EXPERIENCED AN INCREASE IN STOPPING DISTANCE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO STATED THAT THEY WERE UNABLE TO DIAGNOSE THE FAILURE. THE FAILURE CONTINUED TO OCCUR WHENEVER THE BRAKES WERE APPLIED AT LOW SPEEDS. THE MANUFACTURER WAS NOTIFIED AND CONFIRMED THAT HIS VIN WAS NOT INCLUDED IN NHTSA RECALL CAMPAIGN ID 05V379000, SERVICE BRAKES, HYDRAULIC ANTILOCK. THE VEHICLE WAS NOT REPAIRED AND THE FAILURE CONTINUED TO OCCUR WHENEVER THE BRAKES WERE APPLIED AT LOW SPEEDS. THE FAILURE MILEAGE WAS 114,000 AND THE CURRENT MILEAGE WAS 121,000.
NHTSA ODI #10342663
38,754 miles · Jul 10, 2010
Service Brakes, Hydraulic
ABS ACTIVATES AT LOW SPEEDS (LESS THAN 10 MPH) FOR NO REASON CAUSING REDUCED BRAKING. THE PROBLEM IS CAUSED BY A BUILDUP OF CORROSION, DIRT AND OTHER MATERIALS BETWEEN THE FRONT HUB/BEARING AND WHEEL SPEED SENSOR CAUSING LOSS OF SPEED SENSOR SIGNAL. THE PROBLEM WAS FIRST REPAIRED IN 2005 UNDER NHTSA RECALL CAMPAIGN NUMBER 05V…
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ABS ACTIVATES AT LOW SPEEDS (LESS THAN 10 MPH) FOR NO REASON CAUSING REDUCED BRAKING. THE PROBLEM IS CAUSED BY A BUILDUP OF CORROSION, DIRT AND OTHER MATERIALS BETWEEN THE FRONT HUB/BEARING AND WHEEL SPEED SENSOR CAUSING LOSS OF SPEED SENSOR SIGNAL. THE PROBLEM WAS FIRST REPAIRED IN 2005 UNDER NHTSA RECALL CAMPAIGN NUMBER 05V379000 - SERVICE BRAKES, HYDRAULIC:ANTILOCK:CONTROL UNIT/MODULE. THE PROBLEM RECURRED AGAIN IN JANUARY 2010 AND WAS REPAIRED AGAIN. THERE WAS NO ACCIDENT. *TR
NHTSA ODI #10342397
39,397 miles · Jul 9, 2010
Service Brakes, Hydraulic
BRAKE LINES CORRODED CAUSING THE FLUID TO LEAK AND LOSS OF MOST BRAKING CAPACITY. THERE WAS NO ACCIDENT. ALL THE BRAKE LINES WERE REPLACED. THE WORK WAS PERFORMED BY A CHEVROLET DEALER AND THE OLD PARTS ARE NOT AVAILABLE. *TR
NHTSA ODI #10342350
70,250 miles · Jul 1, 2010
Service Brakes, Hydraulic
DRIVING ALONG AND STOPPED AT RED TRAFFIC SIGNAL BEHIND ANOTHER VEHICLE, WHEN WE STARTED MOVING OTHER VEHICLE DECIDED TO TURN, I HIT MY BRAKE PEDAL AND IT WENT TO THE FLOOR. I PULLED OVER AND CHECKED TO SEE THE PROBLEM AND FOUND THE REAR BRAKE LINE HAD RUSTED AND RUPTURED. I REPLACED THE REAR BRAKE LINE AND FLUID AND HAVE THE OLD…
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DRIVING ALONG AND STOPPED AT RED TRAFFIC SIGNAL BEHIND ANOTHER VEHICLE, WHEN WE STARTED MOVING OTHER VEHICLE DECIDED TO TURN, I HIT MY BRAKE PEDAL AND IT WENT TO THE FLOOR. I PULLED OVER AND CHECKED TO SEE THE PROBLEM AND FOUND THE REAR BRAKE LINE HAD RUSTED AND RUPTURED. I REPLACED THE REAR BRAKE LINE AND FLUID AND HAVE THE OLD PARTS IF REQUIRED TO SEE. *TR
NHTSA ODI #10340954
138,000 miles · Jun 16, 2010
Air BagsService Brakes, HydraulicCrashInjury
I WAS TRAVELING APPROX 25 MPH IN THE RAINY, WET EVENING OF JUNE 15, 2010 AT 10:30 PM TRAVELING EAST ON CR 87 AND TURNING TO GET UP ON THE OVERPASS BRIDGE OF EXIT 234. I STARTED TO HYDROPLANE WHEN I HIT THE GRAVEL, ROCK PART OF THE ROAD AND SKIDDED INTO THE RIGHT SIDE OF THE BRIDGE HITTING MY PASSENGER TIRE AND BOUNCING ME OUT AN…
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I WAS TRAVELING APPROX 25 MPH IN THE RAINY, WET EVENING OF JUNE 15, 2010 AT 10:30 PM TRAVELING EAST ON CR 87 AND TURNING TO GET UP ON THE OVERPASS BRIDGE OF EXIT 234. I STARTED TO HYDROPLANE WHEN I HIT THE GRAVEL, ROCK PART OF THE ROAD AND SKIDDED INTO THE RIGHT SIDE OF THE BRIDGE HITTING MY PASSENGER TIRE AND BOUNCING ME OUT AND SPINNING AROUND. I TRIED TO COMPENSATE BY APPLYING BRAKES GENTLY AND MY BRAKES LOCKED UP, MY SEAT BELT DID NOT HOLD ME BACK AS I HIT THE STEERING WHEEL WITH MY HEAD AND CHEST. I THEN WAS SPUN HEAD ON INTO THE LEFT SIDE OF THE BRIDGE AND SMASHED THE ENTIRE FRONT END OF MY TRUCK. I WAS SO SCARED AND ALL I COULD THINK IS WHEN IS MY AIRBAG GOING TO GO OFF, IT NEVER DID. THERE IS OVER $5000.00 DAMAGE TO MY VEHICLE AND IT IS ONLY WORTH $8000.00. I WENT TO THE ER AND SUFFERED MILD CONCUSSION, NECK STRAIN AND BRUISED CHEST. *TR
NHTSA ODI #10336631
120,000 miles · Jun 2, 2010
Service Brakes, Hydraulic
I WAS DRIVING MY 2000 CHEVROLET SILVERADO PICKUP TRUCK AT 40 MPH AND ATTEMPTED TO APPLY MY BRAKES TO MAKE A LEFT HAND TURN INTO THE HALFMOON FIRE DEPARTMENT DRIVEWAY. WHEN I APPLIED THE BRAKES THEY SUDDENLY DROPPED TO THE FLOOR AND THE TRUCK DID NOT SLOW DOWN. IT COULD HAVE RESULTED IN A SERIOUS ACCIDENT BUT I WAS LUCKY. I IN…
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I WAS DRIVING MY 2000 CHEVROLET SILVERADO PICKUP TRUCK AT 40 MPH AND ATTEMPTED TO APPLY MY BRAKES TO MAKE A LEFT HAND TURN INTO THE HALFMOON FIRE DEPARTMENT DRIVEWAY. WHEN I APPLIED THE BRAKES THEY SUDDENLY DROPPED TO THE FLOOR AND THE TRUCK DID NOT SLOW DOWN. IT COULD HAVE RESULTED IN A SERIOUS ACCIDENT BUT I WAS LUCKY. I INSPECTED THE VEHICLE, AFTER NURSING IT TO A SAFE LOCATION, TO FIND A SEVERELY RUSTY MAIN BRAKE LINE WHICH HAD BURST JUST IN FRONT OF THE GAS TANK ON THE UNDERSIDE OF THE TRUCK ALONG THE FRAME. WE PLAN ON REPLACING THE BRAKE LINE OURSELVES AND HAVE NOT YET DETERMINED COST AS THIS HAPPENED LAST NIGHT AT 6:30 PM. *TR
NHTSA ODI #10334282
109,000 miles · May 20, 2010
Service Brakes, Hydraulic
I WAS TOWING A SMALL DUMP TRAILER ON MY FARM USING MY 2000 CHEVY SILVERADO 1500 WHEN THE BRAKE PEDAL WENT TO THE FLOOR. LOST ALL USE OF BRAKES. CRAWLED UNDER THE TRUCK AND DISCOVERED THAT BRAKE LINES ARE ALL COMPLETELY RUSTY AND HAD RUSTED THROUGH CAUSING LOSS OF FLUID AND BRAKE PRESSURE. *TR
NHTSA ODI #10331328
108,000 miles · May 17, 2010
Service Brakes, Hydraulic
2000 CHEVROLET SILVERADO 1500 4WD PICKUP - CORRODED BRAKE LINE. FRONT PASSENGER BRAKE HOSE TO CALIPER END COMPLETELY ROTTED (I.E RUST), LINE LEAKED AND LOST PEDAL FIRMNESS. I IMMEDIATELY TOOK NOTICE AND REPAIRED MY SELF WITH NEW LINE. ALL OTHER BRAKE LINE EXHIBIT SIGNS OF SEVERE CORROSION ALONG WITH FUEL LINES AND TRANSMISSIO…
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2000 CHEVROLET SILVERADO 1500 4WD PICKUP - CORRODED BRAKE LINE. FRONT PASSENGER BRAKE HOSE TO CALIPER END COMPLETELY ROTTED (I.E RUST), LINE LEAKED AND LOST PEDAL FIRMNESS. I IMMEDIATELY TOOK NOTICE AND REPAIRED MY SELF WITH NEW LINE. ALL OTHER BRAKE LINE EXHIBIT SIGNS OF SEVERE CORROSION ALONG WITH FUEL LINES AND TRANSMISSION LINES. I WOULD NOT EXPECT THIS SEVERE CORROSION ON A 1970 CHEVY PICKUP, LET ALONE A 2000. NEW STEEL BRAKE LINES ARE NOT AVAILABLE; ONLY THE HOSES LEADING TO CALIPERS. HARD LINES WILL NEED TO BE FABRICATED WHICH IS LABOR INTENSIVE AND EXPENSIVE. VERY DANGEROUS. *TR
NHTSA ODI #10330777
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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