NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
509 reports82,000 miles · Apr 28, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING AT APPROXIMATELY 10 MPH AND ATTEMPTING TO BRAKE, THE ABS LIGHT WOULD NOT ILLUMINATE AND THE ABS WOULD NOT ENGAGE. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALERSHIP WHERE THE CONTACT WAS INFORMED THAT THERE WERE NO RECALLS ON THE VEHICLE. THE VIN WAS UNAVAILABLE A…
Read full complaint
TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING AT APPROXIMATELY 10 MPH AND ATTEMPTING TO BRAKE, THE ABS LIGHT WOULD NOT ILLUMINATE AND THE ABS WOULD NOT ENGAGE. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALERSHIP WHERE THE CONTACT WAS INFORMED THAT THERE WERE NO RECALLS ON THE VEHICLE. THE VIN WAS UNAVAILABLE AT THE TIME OF THE COMPLAINT. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 82,000.
NHTSA ODI #10327920
77,709 miles · Apr 28, 2010
Service Brakes, Hydraulic
I SAW THE NEWSPAPER ARTICLE ON THE POSSIBLE BRAKE FAILURE ON 99-03 PICKUP TRUCKS. THIS HAPPENED TO MY SON IN MY 2002 CHEVY SILVERADO IN MY DRIVEWAY WHICH IS ABOUT 100 FEET LONG. HE PUSHED ON THE BRAKES AND THE PEDAL WENT TO THE FLOOR. LUCKILY HE WAS GOING SLOW. THERE WAS BRAKE FLUID IN THE DRIVEWAY. I WAS OUTSIDE AT THE TIM…
Read full complaint
I SAW THE NEWSPAPER ARTICLE ON THE POSSIBLE BRAKE FAILURE ON 99-03 PICKUP TRUCKS. THIS HAPPENED TO MY SON IN MY 2002 CHEVY SILVERADO IN MY DRIVEWAY WHICH IS ABOUT 100 FEET LONG. HE PUSHED ON THE BRAKES AND THE PEDAL WENT TO THE FLOOR. LUCKILY HE WAS GOING SLOW. THERE WAS BRAKE FLUID IN THE DRIVEWAY. I WAS OUTSIDE AT THE TIME AND GOT IN AND PUMPED THE BRAKES. NONE. I HAD TO HAVE IT TOWED TO A REPAIR SHOP AND THEY REPLACE A DEFECTIVE BRAKE LINE. YOUR ARTICLE HAS MADE ME FEARFUL FOR MY FAMILY. *TR
NHTSA ODI #10327830
149,000 miles · Apr 27, 2010
Service Brakes, Hydraulic
MARCH 27, 2010 REAR DRIVER SIDE BRAKE LINE BURST ON 2002 CHEVY SILVERADO WHILE ON HIGHWAY. WHEN BROUGHT IN FOR REPAIR 2 NEW CALIPERS WERE NEEDED DUE TO EXTENSIVE CORROSION. REPAIRS CAME TO $617. *TR
NHTSA ODI #10327674
156,000 miles · Apr 17, 2010
Parking BrakeService Brakes, Hydraulic
CORRODED BRAKE LINES CAUSED THE FAILURE OF BOTH FRONT AND REAR BRAKES AT THE SAME TIME. INOPERABLE REAR EMERGENCY BRAKES PROVIDED NO EMERGENCY STOPPING ABILITY. REPLACED BRAKE LINES. EMERGENCY BRAKE NOT REPAIRED. I UNDERSTAND THAT TRUCKS WITH MANUAL TRANSMISSIONS WERE RECALLED FOR EMERGENCY BRAKE DEFECT CORRECTION, BUT TRUCK…
Read full complaint
CORRODED BRAKE LINES CAUSED THE FAILURE OF BOTH FRONT AND REAR BRAKES AT THE SAME TIME. INOPERABLE REAR EMERGENCY BRAKES PROVIDED NO EMERGENCY STOPPING ABILITY. REPLACED BRAKE LINES. EMERGENCY BRAKE NOT REPAIRED. I UNDERSTAND THAT TRUCKS WITH MANUAL TRANSMISSIONS WERE RECALLED FOR EMERGENCY BRAKE DEFECT CORRECTION, BUT TRUCKS WITH AUTOMATIC TRANSMISSIONS WERE NOT EVENTHOUGH THEY HAVE THE SAME EMERGENCY BRAKE SYSTEM. MY VEHICLE HAS AN AUTOMATIC TRANSMISSION. NOT CERTAIN WHEN EMERGENCY BRAKES BECAME INOPERABLE, BUT MY GUESS IS AROUND 2004 OR 2005, WITH 60K TO70K MILES. BRAKE LINE RUPTURE WAS IN 2009 AT 156K MILES. *TR
NHTSA ODI #10326128
Mileage unknown · Apr 16, 2010
Service Brakes, Electric
ABS LIGHT KEEPS COMING ON AND OFF, WHEN THIS HAPPENS I HAVE NO BRAKES CAUSING ME TO RUN OUT INTO INTERSECTIONS OR PROPERTY. I HAVE CLEANED THE ABS SENSORS 2X AND THE PROBLEM KEEPS PERSISTING THIS HAS HAPPENED 3X NOW. *TR
NHTSA ODI #10326028
90,000 miles · Apr 15, 2010
Service Brakes, Hydraulic
RUPTURE OF HYDRAULIC BRAKE LINES INCLUDING ANTI LOCK PORTION, TOTAL LOSS OF BRAKING. *TR
NHTSA ODI #10325807
20,000 miles · Apr 13, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2002 CHEVROLET 1500. WHILE DRIVING AT APPROXIMATELY 5 MPH, THE CONTACT NOTICED THAT THE VEHICLE CONTINUED MOVING WHEN HE DEPRESSED THE BRAKE PEDAL. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALERSHIP BUT THE DEALER COULD NOT DUPLICATE THE PROBLEM. A LOCAL MECHANIC REPLACED THE BRAKE PADS AND ROTORS BUT THE CO…
Read full complaint
TL*THE CONTACT OWNS A 2002 CHEVROLET 1500. WHILE DRIVING AT APPROXIMATELY 5 MPH, THE CONTACT NOTICED THAT THE VEHICLE CONTINUED MOVING WHEN HE DEPRESSED THE BRAKE PEDAL. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALERSHIP BUT THE DEALER COULD NOT DUPLICATE THE PROBLEM. A LOCAL MECHANIC REPLACED THE BRAKE PADS AND ROTORS BUT THE CONTACT WAS STILL EXPERIENCING THE SAME FAILURE. THE CONTACT HAD NOT CALLED THE MANUFACTURER AT THE TIME OF THE COMPLAINT. THE FAILURE MILEAGE WAS APPROXIMATELY 20,000. THE CURRENT MILEAGE WAS APPROXIMATELY 84,000. UPDATED 3/31/15*CN UPDATED 04/07/15*JB
NHTSA ODI #10325363
55,082 miles · Apr 13, 2010
Service Brakes, Hydraulic
BRAKE FAILURE, HYDRAULIC STEEL BRAKE LINES RUSTED AND BURST WHEN BRAKES WERE APPLIED RESULTING IN TOTAL LOSS OF BRAKES. ALL STEEL BRAKE LINES HAD TO BE REPLACED BECAUSE THEY WERE ALL SEVERELY RUSTED COSTING $1400.00. *TR
NHTSA ODI #10325332
21,500 miles · Apr 12, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 5 MPH WHEN THE BRAKES FAILED TO ENGAGE. THE BRAKE PEDAL WAS ENGAGED REPEATEDLY BEFORE IN ORDER TO STOP THE VEHICLE. THE FAILURE OCCURRED WHENEVER TRAVELING BETWEEN 5 TO 10 MPH. THE VEHICLE HAD NOT BEEN REPAIRED AT THE TIME OF THE COMPLAINT…
Read full complaint
TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 5 MPH WHEN THE BRAKES FAILED TO ENGAGE. THE BRAKE PEDAL WAS ENGAGED REPEATEDLY BEFORE IN ORDER TO STOP THE VEHICLE. THE FAILURE OCCURRED WHENEVER TRAVELING BETWEEN 5 TO 10 MPH. THE VEHICLE HAD NOT BEEN REPAIRED AT THE TIME OF THE COMPLAINT. THE FAILURE MILEAGE WAS 21,500. THE CURRENT MILEAGE WAS 23,200. UPDATED 06/03/10*BF UPDATED 06/07/10*JB
NHTSA ODI #10325025
92,851 miles · Apr 10, 2010
Service Brakes, Hydraulic
WHILE ATTEMPTING TO STOP FOR A RED LIGHT, THE BRAKE PEDAL WENT TO THE FLOOR AND I WENT THROUGH THE LIGHT. AFTER GETTING THE TRUCK STOPPED WITH THE EMERGENCY BRAKE, I FOUND BRAKE FLUID LEAKING FROM UNDER THE TRUCK FROM CORRODED BRAKE LINES. I MADE TEMPORARY REPAIRS TO THE LEAKING LINES AND RETURNED TO MY HOME. I CHECKED ONLINE AB…
Read full complaint
WHILE ATTEMPTING TO STOP FOR A RED LIGHT, THE BRAKE PEDAL WENT TO THE FLOOR AND I WENT THROUGH THE LIGHT. AFTER GETTING THE TRUCK STOPPED WITH THE EMERGENCY BRAKE, I FOUND BRAKE FLUID LEAKING FROM UNDER THE TRUCK FROM CORRODED BRAKE LINES. I MADE TEMPORARY REPAIRS TO THE LEAKING LINES AND RETURNED TO MY HOME. I CHECKED ONLINE ABOUT THIS PROBLEM AND FOUND IT SEEMS TO BE A COMMON PROBLEM. I ALSO FOUND FROM FORUMS GM KNOWS OF THIS PROBLEM AND SIMPLY SAYS TO LIVE WITH IT. SO FAR I HAVEN'T DONE ANYTHING TO FIX THE PROBLEM AS GM DOESN'T OFFER ANY REPLACEMENT PARTS. *TR
NHTSA ODI #10324811
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.
Illustration