NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
147 reportsClear category filter35,000 miles · Jan 9, 2008
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 10 MPH OR BELOW, THE ABS SENSOR FAILED AND PREVENTED THE VEHICLE FROM STOPPING. THE CONTACT HAS HAD ONE SIDE OF THE VEHICLE REPAIRED; HOWEVER, THE FAILURE RECURRED. HE TOOK THE VEHICLE BACK TO THE DEALER AND THEY TOOK APART THE COMPONENT AND PLACED IT BACK IN …
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 10 MPH OR BELOW, THE ABS SENSOR FAILED AND PREVENTED THE VEHICLE FROM STOPPING. THE CONTACT HAS HAD ONE SIDE OF THE VEHICLE REPAIRED; HOWEVER, THE FAILURE RECURRED. HE TOOK THE VEHICLE BACK TO THE DEALER AND THEY TOOK APART THE COMPONENT AND PLACED IT BACK IN THE LOCATION THAT THE SENSORS WERE REPLACED. THE FIRST TIME THE FAILURE OCCURRED, THE VEHICLE WAS REPAIRED UNDER WARRANTY. HE WAS INFORMED THAT THE RECALL DID NOT APPLY TO HIS VEHICLE BECAUSE HE DOES NOT LIVE IN A HIGH CORROSION AREA. AS OF JANUARY 9, 2008, THE VEHICLE IS STILL AT THE DEALER TO BE REPAIRED. THE FAILURE MILEAGE WAS 35,000 AND CURRENT MILEAGE WAS 75,000.
NHTSA ODI #10214326
Mileage unknown · Dec 17, 2007
Electrical SystemParking BrakeService Brakes, Hydraulic
PARKING BRAKE FAILURE - DESIGN FAULT. PER CHEVROLET DEALERSHIP AND INDEPENDENT MECHANIC THE PARKING BRAKE FAILURE TO ENGAGE IS DUE TO NOT USING THE PARKING BRAKE EACH TIME THE TRUCK IS PARKED. THIS IS A DESIGN FAULT AS A PART SHOULD NOT FAIL IF YOU USE IT ONLY AS NEEDED. CHEVROLET HAS A RECALL FOR THE 2001 SILVERADO MANUAL TRANS…
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PARKING BRAKE FAILURE - DESIGN FAULT. PER CHEVROLET DEALERSHIP AND INDEPENDENT MECHANIC THE PARKING BRAKE FAILURE TO ENGAGE IS DUE TO NOT USING THE PARKING BRAKE EACH TIME THE TRUCK IS PARKED. THIS IS A DESIGN FAULT AS A PART SHOULD NOT FAIL IF YOU USE IT ONLY AS NEEDED. CHEVROLET HAS A RECALL FOR THE 2001 SILVERADO MANUAL TRANSMISSION BUT HAS NOT RECALLED THE AUTOMATIC TRANSMISSION MODELS WITH THE SAME ISSUE. ABS BRAKES: ABS LIGHT GENERALLY COMES ON WHEN DRIVING THE TRUCK. CHEVROLET HAS A RECALL FOR THE ABS SYSTEM FAILURE ON THE 2001 SILVERADO BUT HAS LIMITED THE RECALL TO STATES WITH MORE EROSION (SALT) AND THEREFORE IS NOT FIXING THIS ISSUE IN TEXAS. ELECTRICAL SYSTEM - INSTRUMENT PANEL: THE INSTRUMENT PANEL DISPLAYS WARNING LIGHTS, E.G. ABS LIGHT, BRAKE LIGHT, ETC. INTERMITTENTLY. CHEVROLET HAS A RECALL ON THE 2001 CHEVROLET SILVERADO INSTRUMENT PANEL HOWEVER NOT FOR THIS VIN NUMBER. *TR
NHTSA ODI #10212096
15,000 miles · Dec 9, 2007
Service Brakes, Hydraulic
BRAKE FAILURES. STARTED HAPPENING AFTER ABOUT 15,000 MILES. *TR
NHTSA ODI #10211281
79,000 miles · Nov 8, 2007
Service Brakes, Hydraulic
ANTILOCK BRAKES ACTIVATE WITHOUT CAUSE. THIS CAUSES LONGER STOPPING DISTANCES. THIS WAS REPAIRED WITH EXISTING RECALL AND PROBLEM IS RECURRING. *TR
NHTSA ODI #10208461
103,000 miles · Nov 6, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 10 MPH, THE BRAKE PEDAL VIBRATED WHEN DEPRESSED AND THE VEHICLE TOOK LONGER THAN NORMAL TO STOP. THE DEALER WAS UNABLE TO DETERMINE THE CAUSE OF THE FAILURE. THE MANUFACTURER STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE B…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 10 MPH, THE BRAKE PEDAL VIBRATED WHEN DEPRESSED AND THE VEHICLE TOOK LONGER THAN NORMAL TO STOP. THE DEALER WAS UNABLE TO DETERMINE THE CAUSE OF THE FAILURE. THE MANUFACTURER STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE CURRENT AND FAILURE MILEAGES WERE 103,000. THE CONSUMER STATED ONCE HE INFORMED THE DEALERSHIP OF THE RECALL, THE MECHANICS CHECKED THE ABS SENSOR AND FOUND THE WIRE HARNESS TO BE CORRODED. THE CONSUMER STATED THE WIRE HARNESS WAS REPLACED AND THE SENSOR NEEDED TO BE CLEANED AND NOW THE PROBLEM IS FIXED. UPDATED 12/12/07 *TR
NHTSA ODI #10208032
67,500 miles · Oct 29, 2007
Service Brakes, HydraulicVehicle Speed Control
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH THROUGH A PARKING LOT, THE CONTACT APPLIED THE BRAKES AND THE VEHICLE CONTINUED FORWARD. THE BRAKES EVENTUALLY BEGAN TO FUNCTION. HE WAS ABLE TO DRIVE THE VEHICLE TO A MECHANIC AND THE FAILURE WAS DIAGNOSED AS THE VEHICLE SPEED CONTROL SENSOR. HE WILL H…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH THROUGH A PARKING LOT, THE CONTACT APPLIED THE BRAKES AND THE VEHICLE CONTINUED FORWARD. THE BRAKES EVENTUALLY BEGAN TO FUNCTION. HE WAS ABLE TO DRIVE THE VEHICLE TO A MECHANIC AND THE FAILURE WAS DIAGNOSED AS THE VEHICLE SPEED CONTROL SENSOR. HE WILL HAVE THE VEHICLE SPEED CONTROL SENSOR REPLACED. IN OCTOBER 2002, THE SPEED CONTROL SENSORS WERE CLEANED FOR CORROSION, BUT NOT REPLACED UNDER NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC: ANTILOCK). THE PURCHASE DATE WAS UNKNOWN. THE CURRENT MILEAGE WAS 67,800 AND FAILURE MILEAGE WAS 67,500. * UPDATED 12/12/07 *BF UPDATED 12/12/07 *TR
NHTSA ODI #10207278
96,000 miles · Jul 9, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE ANTILOCK BRAKE SENSORS ARE ENGAGING WHEN THE VEHICLE IS TRAVELING 5 MPH OR LESS. THE FAILURE OCCURS WHILE DRIVING AND THIS IS THE SECOND TIME. THE FIRST OCCURRENCE WAS REPAIRED UNDER SAFETY RECALL # 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK).…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE ANTILOCK BRAKE SENSORS ARE ENGAGING WHEN THE VEHICLE IS TRAVELING 5 MPH OR LESS. THE FAILURE OCCURS WHILE DRIVING AND THIS IS THE SECOND TIME. THE FIRST OCCURRENCE WAS REPAIRED UNDER SAFETY RECALL # 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). FOR THE SECOND OCCURRENCE, LESS THAN 20,000 MILES LATER, THE DEALER HAS REFUSED TO MAKE THE REPAIR UNDER THE SAFETY RECALL. THE CURRENT MILEAGE IS 97,000 AND FAILURE MILEAGE WAS 96,000.
NHTSA ODI #10195658
20,000 miles · Jun 22, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 10 MPH AND APPLYING THE BRAKE, THE VEHICLE TAKES A LONG TIME TO STOP. THE DEALER HAS BEEN UNABLE TO DETERMINE THE CAUSE OF FAILURE. THE MANUFACTURER STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA RECALL # 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTIL…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 10 MPH AND APPLYING THE BRAKE, THE VEHICLE TAKES A LONG TIME TO STOP. THE DEALER HAS BEEN UNABLE TO DETERMINE THE CAUSE OF FAILURE. THE MANUFACTURER STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA RECALL # 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE VEHICLE HAS NOT BEEN TO THE DEALER. THE CURRENT MILEAGE IS 61,000 AND FAILURE MILEAGE WAS 20,000.
NHTSA ODI #10194012
56,000 miles · Jun 11, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. HE STATED THAT THE PARKING BRAKE DOES NOT WORK. THE DEALER INSPECTED THE VEHICLE AND DETERMINED THERE WAS A MALFUNCTION WITH THE PARKING BRAKE. THE DEALER STATED THAT THE VEHICLE WAS NOT INCLUDED AS PART OF A RECALL. THE FAILURE AND CURRENT MILEAGES WERE 56,000. THE VIN W…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. HE STATED THAT THE PARKING BRAKE DOES NOT WORK. THE DEALER INSPECTED THE VEHICLE AND DETERMINED THERE WAS A MALFUNCTION WITH THE PARKING BRAKE. THE DEALER STATED THAT THE VEHICLE WAS NOT INCLUDED AS PART OF A RECALL. THE FAILURE AND CURRENT MILEAGES WERE 56,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10192949
69,000 miles · Apr 10, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH THE ABS ACTIVATED WHEN THE BRAKE PEDALWAS DEPRESSED AND THE VEHICLE FAILED TO STOP. THE ROAD CONDITIONS WERE CLEAR. THE DEALER HAD NOT INSPECTED THE VEHICLE. THERE WAS RECALL # 05V379000 CONCERNING THE ANTILOCK BRAKES. PRIOR TO THE FAILURE THE VEHICL…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH THE ABS ACTIVATED WHEN THE BRAKE PEDALWAS DEPRESSED AND THE VEHICLE FAILED TO STOP. THE ROAD CONDITIONS WERE CLEAR. THE DEALER HAD NOT INSPECTED THE VEHICLE. THERE WAS RECALL # 05V379000 CONCERNING THE ANTILOCK BRAKES. PRIOR TO THE FAILURE THE VEHICLE WAS INSPECTED AND REPAIRED UNDER THE RECALL. THE CONTACT SPOKE WITH A GENERAL MOTORS REPRESENTATIVE, WHO STATED THAT THE DEALER WOULD BE UNABLE TO INSPECT OR REPAIR THE VEHICLE AGAIN. THE CURRENT AND FAILURE MILEAGE WERE 69,000.*AK UPDATED 04/30/07. *JB
NHTSA ODI #10187448
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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