IllustrationABS ACTIVATES WITHOUT ANY REASON ON DRY PAVEMENT DURING LOW SPEED BRAKING. BRAKES WILL NOT WORK, THEN. VERY DANGEROUS SITUATION, ALMOST CAUSED AN ACCIDENT! TRUCK IS TECHNICALLY IN BEST CONDITION, HAS ONLY 40000 MILES!
1999 Chevrolet Silverado 1500
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 1999 Chevrolet Silverado 1500 do not stand out strongly from the model-year median of 525.
About this comparison →How this year compares
Owner complaints by model year
Compare all Silverado 1500 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
130–25K
3725–50K
6150–75K
6275–100K
141100–150K
104150K+
418 reports with mileage · 169 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Service Brakes, Hydraulic. Review the 222 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 126 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Structure. Review the 53 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
43 crash reports5 fire reports18 injury reports
Service Brakes complaints
126 reports1. ABS ACTIVATION AT LOW SPEEDS WHEN WHEELS ARE NOT SLIPPING. WHEN SLOWING THE TRUCK DOWN THE VEHICLE ABS ACTIVATES PREVENTING THE VEHICLE FROM STOPPING UNLESS YOU EITHER RELEASE AND REAPPLY THE BRAKE OR COLLIDE WITH THE OBJECT IN FRONT OF YOU. 2. BRAKE LINE FAILURE DUE TO RUST AND CORROSION. WHILE TRAVELING DOWN THE HIGHWAY PUL…
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1. ABS ACTIVATION AT LOW SPEEDS WHEN WHEELS ARE NOT SLIPPING. WHEN SLOWING THE TRUCK DOWN THE VEHICLE ABS ACTIVATES PREVENTING THE VEHICLE FROM STOPPING UNLESS YOU EITHER RELEASE AND REAPPLY THE BRAKE OR COLLIDE WITH THE OBJECT IN FRONT OF YOU. 2. BRAKE LINE FAILURE DUE TO RUST AND CORROSION. WHILE TRAVELING DOWN THE HIGHWAY PULLING A 4,000 POUND TRAILER THE BRAKE LINE RUPTURED UNDER THE DRIVERS DOOR CAUSING A LOSS OF BRAKES. I HAD THOUGHT THE BRAKE SYSTEM WAS CROSSED TYPE SYSTEM AND THAT I SHOULD HAVE HAD BRAKE PRESSURE ON THE REMAINING INTACT LINES BUT THE PEDAL WAS SO SOFT I DON'T BELIEVE THERE WERE ANY BRAKES. VERY DISAPPOINTED IN THE BRAKE SYSTEM UNDER EMERGENCY FAILURE.
I WAS DRIVING DOWN A 2 LANE ROAD ROAD AND A CAR SLOWED IN FRONT OF ME. AS I APPLIED THE BRAKES THE PEDAL WENT TO THE FLOOR. I WAS ABLE TO AVOID THE CAR BY GOING TO THE SHOULDER AND THEN TURING ON TO A SIDE STREET. ONCE STOPED I EXITED THE TRUCK AND SAW BRAKE FLUID LEAKING FROM BELOW THE DRIVERS DOOR. THIS EXACT PROBLEM HAPPENED …
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I WAS DRIVING DOWN A 2 LANE ROAD ROAD AND A CAR SLOWED IN FRONT OF ME. AS I APPLIED THE BRAKES THE PEDAL WENT TO THE FLOOR. I WAS ABLE TO AVOID THE CAR BY GOING TO THE SHOULDER AND THEN TURING ON TO A SIDE STREET. ONCE STOPED I EXITED THE TRUCK AND SAW BRAKE FLUID LEAKING FROM BELOW THE DRIVERS DOOR. THIS EXACT PROBLEM HAPPENED TO MY GRANDFATHERS 2001 SILVERADO NOT MORE THAT 3 MONTHS AGO.
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING BETWEEN 5 AND 15 MPH, THE ANTI-LOCK BRAKING SYSTEM WOULD ERRONEOUSLY ACTIVATE AND EXTENDED THE BRAKING DISTANCE. THE CAUSE OF THE FAILURE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE CONTACT WAS INFORMED THAT THE VEHICLE W…
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TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING BETWEEN 5 AND 15 MPH, THE ANTI-LOCK BRAKING SYSTEM WOULD ERRONEOUSLY ACTIVATE AND EXTENDED THE BRAKING DISTANCE. THE CAUSE OF THE FAILURE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE CONTACT WAS INFORMED THAT THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 05V37900 (SERVICE BRAKES). THE CONTACT STATED THAT THE VEHICLE EXPERIENCED THE SAME FAILURE LISTED IN THE RECALL. THE FAILURE MILEAGE WAS 120,000.
I WAS BACK OUT OF DRIVEWAY THEN MY FOOT TO FLOOR .L LOST BRAKE PSI .I AM LUCKY THAT STEEL LINE BROKE IN THE DRIVEWAY AN ON ROAD OR THE HIGHWAY . I KEPT CLEAN AFTER EVERY SNOW I CLEAN BOTTOM OF THE TRUCK .
NO DAMAGE. THE ABS CONTROL SYSTEM FAILED. WARNING LIGHT ON DASH. THIS HAPPENED TWICE ON MY TRUCK. SYSTEM HAD TO BE REPLACED. THIS IS A VERY EXPENSIVE PART.
THIS TRUCK WAS DRIVEN IN MINNESOTA SINCE 1999. ALL THE BRAKE LINES HAVE BEEN REPLACED ON THIS TRUCK DUE TO CORROSION. I DROVE THE TRUCK ON A FOUR LINE ROAD. THE TRAFFIC LIGHT TURNED TO YELLOW AND I TRIED TO STOP BUT THE PEDDLE WENT ALL THE WAY TO THE FLOOR.THIS TRUCK HAD SUCH BAD BRAKE LINES THAT WHEN BLEEDING THE BRAKE LINES F…
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THIS TRUCK WAS DRIVEN IN MINNESOTA SINCE 1999. ALL THE BRAKE LINES HAVE BEEN REPLACED ON THIS TRUCK DUE TO CORROSION. I DROVE THE TRUCK ON A FOUR LINE ROAD. THE TRAFFIC LIGHT TURNED TO YELLOW AND I TRIED TO STOP BUT THE PEDDLE WENT ALL THE WAY TO THE FLOOR.THIS TRUCK HAD SUCH BAD BRAKE LINES THAT WHEN BLEEDING THE BRAKE LINES FOR THE FRONT LINE ANOTHER LEAK STARTED OUT ONE OF THE REAR LINES. THIS IS A CLEAR SAFETY CONCERN FOR OWNERS OF A CHEVROLET SILVERADO.
BRAKE PEDAL WENT TO THE FLOOR WITH NO BRAKING ACTION BACKING OUT OF THE DRIVE (THANKFULLY NOT DRIVING DOWN THE HIGHWAY). BRAKE LINES BENEATH THE DRIVER'S SIDE DOOR WERE RUSTED AND LEAKING FLUID. GM PARTS PERSON SAID IT WAS A KNOWN ISSUE AND THAT THEY SELL A BRAKE LINE REPLACEMENT SET BUT HAD NOT ISSUED A RECALL AND DID NOT COVE…
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BRAKE PEDAL WENT TO THE FLOOR WITH NO BRAKING ACTION BACKING OUT OF THE DRIVE (THANKFULLY NOT DRIVING DOWN THE HIGHWAY). BRAKE LINES BENEATH THE DRIVER'S SIDE DOOR WERE RUSTED AND LEAKING FLUID. GM PARTS PERSON SAID IT WAS A KNOWN ISSUE AND THAT THEY SELL A BRAKE LINE REPLACEMENT SET BUT HAD NOT ISSUED A RECALL AND DID NOT COVER THE COST OF PARTS OR LABOR (WHY?).
WAS DRIVING AND NOTICED THAT THE BRAKE PEDAL FELT SLOPPY. UPON INVESTIGATION I HAD TO REPLACE ALL REAR BRAKE LINES, AND ONE OF THE FRONT DO TO RUST. AS I WAS REPLACING THESE I NOTICED THAT THE FRAME WAS RUSTED AND CRACKED ON THE DRIVERS SIDE UNDER THE DOOR. I HAD A PATCH PUT IN, BUT JUST THE OTHER DAY I ALSO NOTICED A NEW SPO…
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WAS DRIVING AND NOTICED THAT THE BRAKE PEDAL FELT SLOPPY. UPON INVESTIGATION I HAD TO REPLACE ALL REAR BRAKE LINES, AND ONE OF THE FRONT DO TO RUST. AS I WAS REPLACING THESE I NOTICED THAT THE FRAME WAS RUSTED AND CRACKED ON THE DRIVERS SIDE UNDER THE DOOR. I HAD A PATCH PUT IN, BUT JUST THE OTHER DAY I ALSO NOTICED A NEW SPOT ON THE FRAME WHERE IT BENDS ON THE PASSENGER SIDE RIGHT BEHIND THE MOTOR. THE FRAME IS SO WEAK IN THIS SPOT, I DON'T BELIEVE THAT IT CAN BE REPAIRED.
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 10 MPH, THE BRAKE PEDAL WAS APPLIED AND TRAVELED TO THE FLOORBOARD. THE VEHICLE HESITATED TO STOP. THE CONTACT INDEPENDENTLY NOTICED THAT THE BRAKE LINE RUSTED AND THE FRAME ON THE VEHICLE WAS CORRODED. THE BRAKE LINE WAS REPLACED. THE FRAME WAS NO…
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TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 10 MPH, THE BRAKE PEDAL WAS APPLIED AND TRAVELED TO THE FLOORBOARD. THE VEHICLE HESITATED TO STOP. THE CONTACT INDEPENDENTLY NOTICED THAT THE BRAKE LINE RUSTED AND THE FRAME ON THE VEHICLE WAS CORRODED. THE BRAKE LINE WAS REPLACED. THE FRAME WAS NOT REPAIRED. THE VIN WAS UNAVAILABLE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 140,000.
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
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.