NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
468 reportsMileage 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
Mileage unknown · Nov 27, 2007
Tires
BRAND NEW SET OF HANKOOK WAS INSTALLED PROFESSIONALLY AND INFLATION WAS CHECKED EVERY WEEK. SIDEWALL SEPARATION OCCURRED 1 MONTH (2,000 MILES) AFTER INSTALLATION RESULTING IN A LARGE KNOT ON THE SIDEWALL. CURRENTLY TRYING TO CONTACT RETAILER AND MANUFACTURER FOR REPLACEMENT. *TR
NHTSA ODI #10210075
104,000 miles · Nov 19, 2007
Parking Brake
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE PARKING BRAKE WOULD NOT HOLD THE VEHICLE WHEN IT WAS APPLIED. THE MECHANIC STATED THAT THE VEHICLE'S DESIGN CAUSED THE PARKING BRAKE PADS TO RUB AGAINST THE DRUM. AS A RESULT, THE PARKING BRAKE WAS INEFFECTIVE IN IMMOBILIZING THE PARKED VEHICLE. …
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE PARKING BRAKE WOULD NOT HOLD THE VEHICLE WHEN IT WAS APPLIED. THE MECHANIC STATED THAT THE VEHICLE'S DESIGN CAUSED THE PARKING BRAKE PADS TO RUB AGAINST THE DRUM. AS A RESULT, THE PARKING BRAKE WAS INEFFECTIVE IN IMMOBILIZING THE PARKED VEHICLE. AS OF NOVEMBER 19, 2007, THE MECHANIC HAD NOT REPAIRED THE VEHICLE. THE MANUFACTURER STATED THAT HIS VIN WAS EXCLUDED FROM NHTSA CAMPAIGN ID NUMBER 05V161000 (PARKING BRAKE). THE CURRENT AND FAILURE MILEAGES WERE 104,000. UPDATED 3/5/09 *CN UPDATED 03/10/09. *JB
NHTSA ODI #10209312
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
Mileage unknown · Nov 8, 2007
EquipmentFuel System, OtherParking Brake
PARKING BRAKE AND FUEL GAGE. I RECENTLY MOVED OVERSEAS WITH AF AND HAD TO HAVE MY VEHICLE INSPECTED FOR EUROPEAN STANDARDS. MY PARKING BREAK DID NOT WORK AT ALL. I FOUND THIS HARD TO BELIEVE SINCE I HAVE NEVER USED IT. I WAS MANDATED BY EUROPEAN LAW TO GET FIXED IN ORDER TO DRIVE IT AND PAY A $30 FOR EACH MONTH UNTIL I GOT…
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PARKING BRAKE AND FUEL GAGE. I RECENTLY MOVED OVERSEAS WITH AF AND HAD TO HAVE MY VEHICLE INSPECTED FOR EUROPEAN STANDARDS. MY PARKING BREAK DID NOT WORK AT ALL. I FOUND THIS HARD TO BELIEVE SINCE I HAVE NEVER USED IT. I WAS MANDATED BY EUROPEAN LAW TO GET FIXED IN ORDER TO DRIVE IT AND PAY A $30 FOR EACH MONTH UNTIL I GOT IT FIXED. MY FUEL GAGE DOESN'T MAINTAIN HOW MUCH FUEL I HAVE IN MY GAS TANK. WHEN I HAVE A FULL OR EMPTY TANK THE GAUGE JUST RANDOMLY BOUCESS AROUND WITH THE UNKNOWN CORRECT AMOUNT. I AM CURRENTLY SETTING THE MILEAGE UNTIL I CAN FIND SOMEONE TO FIX IT AND THE PARTS I NEED. *TR
NHTSA ODI #10208231
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
Mileage unknown · Oct 29, 2007
Latches/locks/linkages
TAILGATE DOES NOT LATCH AND NEVER HAS. FROM TIME TO TIME IT JUST FLOPS OPEN AND HOPE WHATEVER YOU ARE CARRYING DOES NOT FALL OUT. *TR
NHTSA ODI #10207284
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
80,000 miles · Sep 20, 2007
Wheels
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH OR GREATER, THE CONTACT HEARD A THUMPING NOISE COMING FROM THE FRONT OF THE VEHICLE. THE DEALER HAD NOT INSPECTED THE VEHICLE. THE CONTACT INSPECTED THE VEHICLE AND FELT THAT THE FRONT WHEEL BEARINGS CAUSED THE FAILURE. HE STATED THAT THE SEALS FOR THE …
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH OR GREATER, THE CONTACT HEARD A THUMPING NOISE COMING FROM THE FRONT OF THE VEHICLE. THE DEALER HAD NOT INSPECTED THE VEHICLE. THE CONTACT INSPECTED THE VEHICLE AND FELT THAT THE FRONT WHEEL BEARINGS CAUSED THE FAILURE. HE STATED THAT THE SEALS FOR THE WHEEL BEARINGS FAILED. AS OF SEPTEMBER 20, 2007, THE VEHICLE HAD NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 80,000 AND CURRENT MILEAGE WAS 91,000.
NHTSA ODI #10203519
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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