NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
237 reportsClear category filter121,327 miles · Aug 28, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED THE REAR PASSENGER SIDE BRAKES STARTED TO GRIND, AND A CLUNK WAS HEARD WHILE DRIVING 15 MPH ON DRY FLAT ROAD CONDITIONS. UPON INSPECTION, THE CONTACT NOTICED THE REAR BRAKE PADS AND CALIPER ON THE GROUND. ALSO, THE REAR DRIVER SIDE DUST SHIELD WAS DETERIORATED THE DEALER WAS CONTACTED ON 08/22/06 AND …
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DT*: THE CONTACT STATED THE REAR PASSENGER SIDE BRAKES STARTED TO GRIND, AND A CLUNK WAS HEARD WHILE DRIVING 15 MPH ON DRY FLAT ROAD CONDITIONS. UPON INSPECTION, THE CONTACT NOTICED THE REAR BRAKE PADS AND CALIPER ON THE GROUND. ALSO, THE REAR DRIVER SIDE DUST SHIELD WAS DETERIORATED THE DEALER WAS CONTACTED ON 08/22/06 AND EXPRESSED THAT THE BRAKES HAD TO BE REPLACED. THE MANUFACTURER WAS CONTACTED ON 08/28/06 AND DETERMINED THERE WAS NO RECALL PERTAINING TO THE BRAKES. THE VEHICLE HAD 4-WHEEL ANTILOCK BRAKES.
NHTSA ODI #10166702
51,485 miles · Jul 11, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED THAT THE BRAKES FAILED WHILE DRIVING 15 MPH NEARLY CAUSING AN ACCIDENT; THE VEHICLE SWERVED ON A SIDEWALK IN ORDER TO AVOID CRASHING INTO ANOTHER VEHICLE. THE DEALERS DETERMINED THAT THE CAUSE FOR THE BRAKE MALFUNCTION WAS CAUSED BY THE BRAKELINE RUSTING OUT. 08/02/06 UPDATED. *TT
NHTSA ODI #10162142
58,000 miles · Jul 7, 2006
Service Brakes, Hydraulic
DT: THE CONTACT STATED WHILE DEPRESSING THE BRAKES TRAVELING AT ANY SPEED THEY INTERMITTENTLY SKIDS AS IF THE BRAKE ARE LOCKING UP AND THERE IS AN EXTENDED STOPPING DISTANCE. THE VEHICLE HAS BEEN TAKEN TO THE DEALER ON SEVERAL OCCASIONS. ON ONE OCCASION THE DEALER REPLACED THE BRAKES HOWEVER THE PROBLEM PERSISTED. WHEN THE VEHIC…
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DT: THE CONTACT STATED WHILE DEPRESSING THE BRAKES TRAVELING AT ANY SPEED THEY INTERMITTENTLY SKIDS AS IF THE BRAKE ARE LOCKING UP AND THERE IS AN EXTENDED STOPPING DISTANCE. THE VEHICLE HAS BEEN TAKEN TO THE DEALER ON SEVERAL OCCASIONS. ON ONE OCCASION THE DEALER REPLACED THE BRAKES HOWEVER THE PROBLEM PERSISTED. WHEN THE VEHICLE TAKEN BACK TO THE DEALER, THEY TEST DROVE THE VEHICLE AND DETERMINED THAT THE PROBLEM WAS FIX. HOWEVER, THE PROBLEM STILL PERSISTS. *NM
NHTSA ODI #10161745
84,000 miles · Jul 3, 2006
Service Brakes, HydraulicCrash
WHILE ATTEMPTING TO PARK MY VEHICLE I BEGAN COMING TO A STOP AND WAS GOING TO BEGIN BACKING UP, AT THIS TIME, THE ABS KICKED IN AND THE TRUCK LURCHED FORWARD HITTING A PARKED CAR. THE BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR AND THERE WAS NO PREVIOUS WARNING. IF SOMEONE HAD BEEN BETWEEN MY VEHICLE AND THE ONE HIT, THEY COULD…
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WHILE ATTEMPTING TO PARK MY VEHICLE I BEGAN COMING TO A STOP AND WAS GOING TO BEGIN BACKING UP, AT THIS TIME, THE ABS KICKED IN AND THE TRUCK LURCHED FORWARD HITTING A PARKED CAR. THE BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR AND THERE WAS NO PREVIOUS WARNING. IF SOMEONE HAD BEEN BETWEEN MY VEHICLE AND THE ONE HIT, THEY COULD HAVE BEEN KILLED. THE VEHICLE WAS TOWED FROM THE LOT TO THE DEALER. WAS TOLD TO CALL CUSTOMER SERVICE BY THE LOCAL DEALERSHIP. THE TRUCK HAD 84000 MILES AND BRAKES HAD ALL BEEN REPLACED 3 MONTHS EARLIER. I DO NOT FEEL SAFE DRIVING THIS TRUCK NOW. *JB
NHTSA ODI #10161349
120,944 miles · Jun 27, 2006
Service Brakes, Hydraulic
DRIVING NORTH ON GARDERSTATE PARKWAY THE BRAKE LIGHT OF MY 2000 CHEVY SILVERADO CAME ON. I EXITED PARKWAY AT NORTHFIELD EXIT AND I APPLIED MY BRAKES. THE BRAKE PEDAL FELT SOFT AND THE PEDAL WENT TO THE FLOOR. I WAS ABLE TO MAKE A LEFT TURN AT THE END OF THE EXIT RAMP. THE LIGHT AT TILTON ROAD TURNED RED I APPLIED BRAKES THE…
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DRIVING NORTH ON GARDERSTATE PARKWAY THE BRAKE LIGHT OF MY 2000 CHEVY SILVERADO CAME ON. I EXITED PARKWAY AT NORTHFIELD EXIT AND I APPLIED MY BRAKES. THE BRAKE PEDAL FELT SOFT AND THE PEDAL WENT TO THE FLOOR. I WAS ABLE TO MAKE A LEFT TURN AT THE END OF THE EXIT RAMP. THE LIGHT AT TILTON ROAD TURNED RED I APPLIED BRAKES THE PEDAL WENT TO THE FLOOR. THERE IS A SUNOCO STATION ON THE CORNER WHICH I COASTED INTO. I CHECKED UNDER THE HOOD FLUID LEVEL WAS BELOW THE MIN. LINE. I ADDED FLUID INTO THE RESERVOIR. I GOT BACK INTO THE TRUCK AND APPLIED MY BRAKES. PEDAL WENT TO THE FLOOR AGAIN. I LOOKED UNDER THE TRUCK AND NOTICED THERE WAS BRAKE FLUID RUNNING ONTO THE GROUND. NOTICED A PEP BOYS STORE ABOUT 1/2 OF A BLOCK DOWN THE ROAD. I WAITED TILL THERE WAS NO CARS COMING AND PROCEEDED OUT ONTO TILTON ROAD TOWARD PEP BOYS. DOWN SHIFTED AND APPLIED BRAKE PEDAL AS I APPROACHED STORE. THEY CHECKED THE BRAKING SYSTEM AND INDICATED THAT A BRAKE LINE WAS LEAKING FLUID. MONDAY THEY REPAIRED THE TRUCK BY REPLACING ABOUT A FIVE (5) FOOT SECTION OF BRAKE LINE AT THE TUNE OF $262.52 WOW. I DO HAVE THE OLD SECTION OF BRAKE LINE THAT WAS REMOVED. THE OLD SECTION OF BRAKE LINE IS SO HEAVILY RUSTED THE SHOP INDICATED IT WAS VERY UNUSUAL. WHEN I GOT HOME I LOOKED AT THE REPAIR AND THE REST OF THE LINE STILL IN THE TRUCK AND I AM WORRIED ABOUT CONDITION OF BRAKE LINES AND THE EXCESSIVE RUST THAT EXIST. I'M WORRIED THAT THERE MAY BE ANOTHER LEAK,RESULT MIGHT BE THAT WE ARE NOT AS LUCKY THE NEXT TIME. THE PARKWAY IS A 65 MPH ROAD AND IF I WOULD HAVE HAD TO STOP VERY FAST DOING THAT SPEED I TRULY BELIEVE I WOULD NEVER HAVE BEEN ABLE TO STOP WITHOUT INJURIES. I HAVE ALWAYS OWNED CHEVY'S AND I KEPT THEM FOR GENERALLY 9 TO 10 YEARS AND I HAVE NEVER HAD A BRAKE LINE RUST OUT AS DID MY 2000 CHEVY TRUCK. I HOPE THAT THIS MATTER CAN BE INVESTIGATED. THANK YOU VERY MUCH FOR TIME SPENT IN READING MY LONG DESCRIPTION OF THIS OCCURRENCE. EDWARD R GLASER. *NM
NHTSA ODI #10160886
38,000 miles · May 31, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED THE REAR BRAKE ROTORS WERE REPLACED DUE TO RUST AFTER ONLY 14,000 MILES. THE PROBLEM APPEARED ON THE FRONT ROTORS AT 38,000 MILES AND THOSE WERE ALSO REPLACED. THE PROBLEM WAS NOTICED BECAUSE THE ABS LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO A SERVICE DEALER FOR REPLACEMENT OF THE BRAKE ROTORS AND P…
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DT*: THE CONTACT STATED THE REAR BRAKE ROTORS WERE REPLACED DUE TO RUST AFTER ONLY 14,000 MILES. THE PROBLEM APPEARED ON THE FRONT ROTORS AT 38,000 MILES AND THOSE WERE ALSO REPLACED. THE PROBLEM WAS NOTICED BECAUSE THE ABS LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO A SERVICE DEALER FOR REPLACEMENT OF THE BRAKE ROTORS AND PADS ON BOTH OCCASIONS. THE RUST FIRST APPEARED NEAR THE AXEL OF THE ROTOR AND WORKED ITS WAY TOWARD THE OUTSIDE. THE RUST WAS ONLY PRESENT ON THE BRAKING SURFACE.
NHTSA ODI #10158646
61,000 miles · May 30, 2006
Service Brakes, Hydraulic
2000 SILVERADO 1500 WITH 70,500 MILES JULY/05 MY BRAKES STATED TO FEEL LIKE I ONLY HAD 70% OF MY BRAKING CAPACITY. IT DOES NOT MATTER WHETHER I STOMP ON THE BRAKE OR BRAKE WITH INCREASING PRESSURE,THE ANTILOCK WILL NOT ENGAGE NOR WILL THE TIRES LOCK UP. I REPLACED ALL 4 ROTORS AND PADS (NON OE @ 62,500 MILES). THE LACK OF BRAKI…
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2000 SILVERADO 1500 WITH 70,500 MILES JULY/05 MY BRAKES STATED TO FEEL LIKE I ONLY HAD 70% OF MY BRAKING CAPACITY. IT DOES NOT MATTER WHETHER I STOMP ON THE BRAKE OR BRAKE WITH INCREASING PRESSURE,THE ANTILOCK WILL NOT ENGAGE NOR WILL THE TIRES LOCK UP. I REPLACED ALL 4 ROTORS AND PADS (NON OE @ 62,500 MILES). THE LACK OF BRAKING WAS STILL PRESENT. NEXT I REPLACED THE MASTER CYLINDER WHICH HAS NOT SOLVED THE PROBLEM. I JUST HAD THE DEALER LOOK AT THE SYSTEM, THEY NOTED THE REAR PADS WERE WORN (AFTER 8,000 MILES). THE DEALERSHIP ALSO SAID THE NON OE PADS WERE PROBABLY THE CAUSE OF THE LACK OF BRAKING. MY CONCERN WAS THE FACT THAT THE LACK OF BRAKING STARTED WHEN THE OE PADS WERE STILL ON THE TRUCK. *NM
NHTSA ODI #10158614
170,000 miles · May 26, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED WHILE THE BRAKES WERE APPLIED AT ANY SPEED, THE ABS ENGAGED. WHEN THE VEHICLE REACHES 5 TO 10MPH, THE BRAKES MADE GROANING NOISES AND THERE WAS AN EXTENDED STOPPING DISTANCE. THERE IS A NHTSA RECALL, 05V379000, REGARDING THE ANTI-LOCK BRAKES. THE VIN WAS NOT INCLUDED IN THE RECALL. THE MANUFACTURER W…
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DT*: THE CONTACT STATED WHILE THE BRAKES WERE APPLIED AT ANY SPEED, THE ABS ENGAGED. WHEN THE VEHICLE REACHES 5 TO 10MPH, THE BRAKES MADE GROANING NOISES AND THERE WAS AN EXTENDED STOPPING DISTANCE. THERE IS A NHTSA RECALL, 05V379000, REGARDING THE ANTI-LOCK BRAKES. THE VIN WAS NOT INCLUDED IN THE RECALL. THE MANUFACTURER WAS ALERTED, BUT THE VEHICLE HAS NOT BEEN INSPECTED.
NHTSA ODI #10158314
102,000 miles · Apr 5, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED WHILE DRIVING A BRAKE FAILURE OCCURRED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE ONLY THE RIGHT FRONT BRAKE HOSE WAS REPLACED DUE TO RUST CAUSING A LEAK WHICH RESULTED IN LOSS OF BRAKES. REPLACED BRAKE LINE TO RIGHT FRONT WHEEL TO ABS BOX. TOTAL CHARGE WAS $212.05. *AK
NHTSA ODI #10154593
12,000 miles · Feb 13, 2006
Service Brakes, Hydraulic
ABS LIGHT STAYS ON ALL THE TIME WHEN DRIVING. *NM
NHTSA ODI #10150171
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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