NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
147 reportsClear category filter93,000 miles · Nov 12, 2010
Service Brakes, Hydraulic
BRAKE LINES ON MY 2001 CHEVROLET SILVERADO HAVE DETERIORATED TO THE POINT WHERE THE BRAKE LINES WILL NOT PASS THE YEARLY VEHICLE INSPECTION. THE CORROSION RATE OF THESE BRAKE LINES ARE SIGNIFICANTLY GREATER THAN SHOULD BE EXPECTED FOR THE AGE OF THE VEHICLE. I WOULD LIKE HAVE THIS INSTANCE ADDED TO THE ONGOING INVESTIGATION IN…
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BRAKE LINES ON MY 2001 CHEVROLET SILVERADO HAVE DETERIORATED TO THE POINT WHERE THE BRAKE LINES WILL NOT PASS THE YEARLY VEHICLE INSPECTION. THE CORROSION RATE OF THESE BRAKE LINES ARE SIGNIFICANTLY GREATER THAN SHOULD BE EXPECTED FOR THE AGE OF THE VEHICLE. I WOULD LIKE HAVE THIS INSTANCE ADDED TO THE ONGOING INVESTIGATION INTO THIS SAFETY ISSUE. *TR
NHTSA ODI #10365529
85,000 miles · Oct 28, 2010
Service Brakes, Hydraulic
2001 CHEVY SILVERADO 1500 PICKUP ABS CONTROL MODULE FAILURE AT 85,000 MILES. ABS LIGHT ILLUMINATES ALONG WITH BRAKE LIGHT WHILE DRIVING. VEHICLE HAS NO OR INTERMITTENT ABS BRAKES . PUMP CONTINUES TO RUN AFTER VEHICLE SHUTDOWN. AT SLOW SPEEDS VEHICLE MAY NOT STOP. GM DEALER ACKNOWLEDGES PROBLEM EXIST BUT SAYS GM DOES NOT WARRA…
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2001 CHEVY SILVERADO 1500 PICKUP ABS CONTROL MODULE FAILURE AT 85,000 MILES. ABS LIGHT ILLUMINATES ALONG WITH BRAKE LIGHT WHILE DRIVING. VEHICLE HAS NO OR INTERMITTENT ABS BRAKES . PUMP CONTINUES TO RUN AFTER VEHICLE SHUTDOWN. AT SLOW SPEEDS VEHICLE MAY NOT STOP. GM DEALER ACKNOWLEDGES PROBLEM EXIST BUT SAYS GM DOES NOT WARRANTY THE PART AND NO RECALL EXIST. *TR
NHTSA ODI #10362769
105,000 miles · Oct 27, 2010
Service Brakes, Hydraulic
I OWN A 2001 SILVERADO 1500. I HAVE A REOCURRING PROBLEM WITH MY ANTILOCK BRAKES. THE ANTILOCK BRAKES ENGAGE AT LOW SPEEDS WHILE TRYING TO STOP. I HAD THIS PROBLEM IN 2004 AND HAD THE HUB REPLACED ON MY DIME. THEN IT HAPPENED AGAIN IN 2006. THERE WAS A RECALL AT THAT TIME AND HAD ALL THE SPEED SENSORS REPLACED PER RECALL. NOW IN…
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I OWN A 2001 SILVERADO 1500. I HAVE A REOCURRING PROBLEM WITH MY ANTILOCK BRAKES. THE ANTILOCK BRAKES ENGAGE AT LOW SPEEDS WHILE TRYING TO STOP. I HAD THIS PROBLEM IN 2004 AND HAD THE HUB REPLACED ON MY DIME. THEN IT HAPPENED AGAIN IN 2006. THERE WAS A RECALL AT THAT TIME AND HAD ALL THE SPEED SENSORS REPLACED PER RECALL. NOW IN 2010 I'M HAVING THE SAME PROBLEM RE-APPEAR. I OWN ANOTHER 2004 GM PRODUCT W/ ANTILOCKS, AND MANY FRIENDS WITH OTHER YEAR GM VEHICLES WITH NO ABS ISSUES. IS THIS PROBLEM ONLY WITH THE 2001 SILVERADO 1500? *TR
NHTSA ODI #10362596
15,000 miles · Oct 26, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHEN THE VEHICLE CAME TO STOP BELOW 5 MPH, THE BRAKES PULSATED. THE FAILURE OCCURRED EVERY TIME HE ATTEMPTED TO STOP AT A RED LIGHT OR BEGIN PARKING THE VEHICLE. THE VEHICLE WAS REPAIRED PREVIOUSLY ACCORDING TO RECALL 05V379000 (SERVICE BRAKES, HYDRAUL…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHEN THE VEHICLE CAME TO STOP BELOW 5 MPH, THE BRAKES PULSATED. THE FAILURE OCCURRED EVERY TIME HE ATTEMPTED TO STOP AT A RED LIGHT OR BEGIN PARKING THE VEHICLE. THE VEHICLE WAS REPAIRED PREVIOUSLY ACCORDING TO RECALL 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK) AT AN AUTHORIZED DEALERSHIP IN 2008L; HOWEVER, THE FAILURE CONTINUED TO OCCUR. THE VEHICLE WAS NOT REPAIRED. THE CONTACT CALLED THE MANUFACTURER WHO ADVISED HIM TO TAKE THE VEHICLE TO THE DEALERSHIP AND HAVE IT REPAIRED AT HIS OWN EXPENSE. THE CURRENT MILEAGE WAS APPROXIMATELY 80,000. THE FAILURE MILEAGE WAS APPROXIMATELY 15,000.
NHTSA ODI #10362433
100,582 miles · Oct 23, 2010
Service Brakes, Hydraulic
TOTAL BRAKE FAILURE DUE TO RUSTED BRAKE LINES. *TR
NHTSA ODI #10361873
156,000 miles · Oct 16, 2010
Service Brakes, HydraulicCrash
FROM STOPPED POSITION I PULLED VEHICLE FORWARD APROX. 50 FT AND TRIED TO STOP. I HEARD ABS PUMP COME ON AND BRAKE PEDAL WAS HARD AS A ROCK WITH NO PULSATION. I THEN HIT A TREE CAUSING DAMAGED TO THE BUMPER, HEADLIGHT AND HOOD. MY SPEED WAS APPROX 4 MPH. THERE WAS NO INDICATOR LIGHT ON BEFORE, DURING OR AFTER THE ACCIDENT. I HAD …
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FROM STOPPED POSITION I PULLED VEHICLE FORWARD APROX. 50 FT AND TRIED TO STOP. I HEARD ABS PUMP COME ON AND BRAKE PEDAL WAS HARD AS A ROCK WITH NO PULSATION. I THEN HIT A TREE CAUSING DAMAGED TO THE BUMPER, HEADLIGHT AND HOOD. MY SPEED WAS APPROX 4 MPH. THERE WAS NO INDICATOR LIGHT ON BEFORE, DURING OR AFTER THE ACCIDENT. I HAD TO REMOVE MAIN ABS FUSE TO MAKE VEHICLE SAFE TO DRIVE. THEN I HAD THE BRAKE AND ABS INDICATOR LIGHTS ON. I CONTACTED GM. THEY DID AN INSPECTION. DURING THE INSPECTION THE INSPECTOR BROKE MY PARKING BRAKE. THEY WOULD NOT TELL ME THE RESULTS, ONLY THAT THEY COULD NOT VERIFY THAT THE ABS CAUSED THE ACCIDENT BECAUSE I HAD REMOVED THE FUSE. BUT DID TELL ME THAT AFTER THE FUSE WAS REINSTALLED THAT THE ABS DID COME ON AT SLOW SPEED STOPS AND ALL INDICATORS LIGHTS WERE OFF. I WAS DENIED ANY OFFER TO REPAIR THE VEHICLE. I ALSO DO NOT KNOW IF MY VEHICLE HAD THE 2005 RECALL DONE TO IT. *TR
NHTSA ODI #10360751
97,000 miles · Oct 15, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING 5 MPH WHEN HE APPLIED THE BRAKES AND THE PEDAL WENT STRAIGHT INTO THE FLOORBOARD. THE EMERGENCY BRAKE WAS APPLIED AND THE VEHICLE COASTED TO A STOP. THE BRAKES WERE REPAIRED. THE FAILURE MILEAGE WAS 97,000 AND THE CURRENT MILEAGE WAS 97,050. UPDATED …
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING 5 MPH WHEN HE APPLIED THE BRAKES AND THE PEDAL WENT STRAIGHT INTO THE FLOORBOARD. THE EMERGENCY BRAKE WAS APPLIED AND THE VEHICLE COASTED TO A STOP. THE BRAKES WERE REPAIRED. THE FAILURE MILEAGE WAS 97,000 AND THE CURRENT MILEAGE WAS 97,050. UPDATED 01/04/11*LJB UPDATED 01/10/11*J
NHTSA ODI #10360638
55,100 miles · Sep 23, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED WHILE DRIVING 5 MPH OR LESS APPROACHING A COMPLETE STOP, THE ANTI-LOCK BRAKES ACTIVATED PREMATURELY. THE FAILURE WOULD OCCUR WHEN BRAKING TO A COMPLETE STOP AT A LOW SPEED. THE MANUFACTURER WAS NOTIFIED AND THEY ADVISED THAT THERE WAS A RECALL UNDER NHTSA C…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED WHILE DRIVING 5 MPH OR LESS APPROACHING A COMPLETE STOP, THE ANTI-LOCK BRAKES ACTIVATED PREMATURELY. THE FAILURE WOULD OCCUR WHEN BRAKING TO A COMPLETE STOP AT A LOW SPEED. THE MANUFACTURER WAS NOTIFIED AND THEY ADVISED THAT THERE WAS A RECALL UNDER NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC: ANTILOCK). THE VIN WAS NOT INCLUDED IN THE RECALL. THE CONTACT EXPERIENCED THE SAME DEFECT AS INDICATED IN THE RECALL. THE VEHICLE HAD NOT BEEN DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS 55,100.
NHTSA ODI #10357205
65,000 miles · Sep 8, 2010
Service Brakes, Hydraulic
UPON STEPPING ON BRAKE AT LOW SPEED TO STOP, IT FELT AS THOUGH ABS TOOK OVER AND CAUSED TRUCK TO LOSE BRAKING POWER. ALMOST CRASHED INTO FENCE. THAN SECOND TIME LESS THAN ONE HOUR LATER HAD SAME THING HAPPEN PULLING INTO DRIVEWAY. THIRD TIME A DAY LATTER PULLING INTO DRIVE ABS FELT AGAIN AND BRAKE NOT ENGAGING. *TR
NHTSA ODI #10354469
155,100 miles · Aug 18, 2010
Service Brakes, Hydraulic
I LOST THE BRAKES ON MY 2001 CHEVY SILVERADO, COMING HOME FROM A FAMILY OUTING. ONCE I WAS FINALLY ABLE TO STOP THE TRUCK, MY HUSBAND SAW ALL OF THE BRAKE FLUID LEAKING OUT. WHEN THE LOCAL CHEVY DEALER INSPECTED IT THEY SAID ALL THE BRAKE LINES WERE CORRODED & BADLY RUSTED THAT BOTH THE FRONT & THE BACK BRAKE LINES HAD TO BE R…
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I LOST THE BRAKES ON MY 2001 CHEVY SILVERADO, COMING HOME FROM A FAMILY OUTING. ONCE I WAS FINALLY ABLE TO STOP THE TRUCK, MY HUSBAND SAW ALL OF THE BRAKE FLUID LEAKING OUT. WHEN THE LOCAL CHEVY DEALER INSPECTED IT THEY SAID ALL THE BRAKE LINES WERE CORRODED & BADLY RUSTED THAT BOTH THE FRONT & THE BACK BRAKE LINES HAD TO BE REPLACED. THEY, OF COURSE, NO LONGER MAKE THE BRAKE LINES FOR THIS TRUCK SO THEY HAD TO BE HAND MADE. *TR
NHTSA ODI #10350244
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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