IllustrationTHE ABS IS ACTIVATING AT LOW SPEEDS MOSTLY DURING PARKING MANEUVERS. THE TRUCK HAS BEEN SERVICED UNDER THE FRONT SENSOR RECALL BUT THE REPAIR DID NOT SOLVE THE PROBLEM. *JB
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, Hydraulic complaints
222 reportsTL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHEN DECELERATING TO 5 MPH OR LOWER, THE ANTILOCK BRAKE PEDAL EXTENDS COMPLETELY TO THE FLOOR AND INCREASES THE STOPPING DISTANCE. THE CONTACT REFERENCED RECALL # 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK), WHICH APPLIES TO HIS VIN. HE STATED THAT THE RECALL REPAIR WAS …
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TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHEN DECELERATING TO 5 MPH OR LOWER, THE ANTILOCK BRAKE PEDAL EXTENDS COMPLETELY TO THE FLOOR AND INCREASES THE STOPPING DISTANCE. THE CONTACT REFERENCED RECALL # 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK), WHICH APPLIES TO HIS VIN. HE STATED THAT THE RECALL REPAIR WAS PERFORMED IN 2002, DURING WHICH THE FAILURE OCCURRED WHILE DRIVING IN REVERSE. THE CURRENT FAILURE OCCURS WHEN THE VEHICLE IS IN DRIVE. THE CURRENT MILEAGE IS 100,090 AND FAILURE MILEAGE WAS 97,000. UPDATED 02-01-08 *BF UPDATED 02/01/08 *TR
ANTI-LOCK BRAKE LIGHT AND THE BRAKE LIGHT ON THE DASH CLUSTER COMES ON AND STAYS ON WHILE DRIVING. *TR
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING AT ANY SPEED, THE BRAKE PEDAL VIBRATED WHEN DEPRESSED AND THE ABS LIGHT ILLUMINATED. THE ROAD CONDITIONS WERE CLEAR. THE DEALER STATED THAT THIS WAS NORMAL BEHAVIOR FOR THE ABS, AND NO REPAIRS WERE PERFORMED. THE DEALER INSPECTED THE VEHICLE ON TWO MORE OCCAS…
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TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING AT ANY SPEED, THE BRAKE PEDAL VIBRATED WHEN DEPRESSED AND THE ABS LIGHT ILLUMINATED. THE ROAD CONDITIONS WERE CLEAR. THE DEALER STATED THAT THIS WAS NORMAL BEHAVIOR FOR THE ABS, AND NO REPAIRS WERE PERFORMED. THE DEALER INSPECTED THE VEHICLE ON TWO MORE OCCASIONS AND COULD NOT FIND ANY FAILURE. THE CONTACT EXPERIENCED THIS FAILURE APPROXIMATELY EIGHT HUNDRED TIMES. THE CURRENT MILEAGE IS 109,000, AND THE FAILURE MILEAGE IS UNKNOWN.*AK
1999 CHEVROLET SILVERADO 1500 PICKUP CUSTOMER STATES THAT HE RECEIVED A RECALL LETTER FOR THE ABS AND AFTER GETTING BRAKES FIXED THE PICKUP STARTED HAVING PROBLEMS WITH STARTING IDLING**CC THE CONSUMER TOOK THE VEHICLE BACK TO DEALER, WHO THEN STATED THE ABS MOTOR WAS RUNNING CONSTANTLY AND THE FUSE NEEDED TO BE PULLED OR THE B…
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1999 CHEVROLET SILVERADO 1500 PICKUP CUSTOMER STATES THAT HE RECEIVED A RECALL LETTER FOR THE ABS AND AFTER GETTING BRAKES FIXED THE PICKUP STARTED HAVING PROBLEMS WITH STARTING IDLING**CC THE CONSUMER TOOK THE VEHICLE BACK TO DEALER, WHO THEN STATED THE ABS MOTOR WAS RUNNING CONSTANTLY AND THE FUSE NEEDED TO BE PULLED OR THE BATTERY WOULD DIE. ONCE THE FUSE WAS PULLED, THE NOISE STOPPED. THE DEALER SAID TO FIX THE PROBLEM WOULD BE COSTLY AND TO JUST DRIVE THE VEHICLE. ONCE THE CONSUMER LEFT THE DEALER THE BRAKE LIGHT ILLUMINATED, THE CONSUMER TOOK THE VEHICLE BACK TO THE DEALER AND IT WAS DETERMINED THAT THE ABS MODULE WAS BAD. THE CONSUMER STATED EVERYTHING WAS FINE BEFORE THE RECALL WAS PERFORMED. THE CONSUMER WAS TOLD THE STARTING PROBLEMS WERE DUE TO THE FUEL PRESSURE REGULATOR NEEDING TO BE REPLACED. THE DEALER DECIDED TO SPLIT THE COST OF THE ABS MODULE WITH THE CONSUMER. *TR
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT RECEIVED A RECALL NOTICE IN THE MAIL TO HAVE THE BRAKES SERVICED. THE DEALER REPLACED THE BRAKES, BUT WAS NOW CHARGING THE CONTACT FOR OTHER SERVICES THAT WERE INCLUDED IN THE RECALL. THE DEALER STATED THAT OTHER PARTS ON THE VEHICLE ASSISTED IN CAUSING THE BR…
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TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT RECEIVED A RECALL NOTICE IN THE MAIL TO HAVE THE BRAKES SERVICED. THE DEALER REPLACED THE BRAKES, BUT WAS NOW CHARGING THE CONTACT FOR OTHER SERVICES THAT WERE INCLUDED IN THE RECALL. THE DEALER STATED THAT OTHER PARTS ON THE VEHICLE ASSISTED IN CAUSING THE BRAKES TO FAIL. THE MANUFACTURER SUGGESTED THAT THE CONTACT'S DRIVING HABITS MAY BE THE REASON FOR THE FAILURE. ALSO, THE DEALER STATED THAT THE CONTACT SHOULD GET USED TO THE BRAKES JUMPING, AND NEEDED TO REPLACE THE ENTIRE BRAKE SYSTEM. THE CURRENT AND FAILURE MILEAGE WERE 75,000.*AK
THE ABS PUMP WONT SHUT OFF WHEN I TURN OFF MY TRUCK, CAUSING A DEAD BATTERY. THE PUMP WENT BAD 3 WEEKS AFTER THE WARRANTY EXPIRED. DEALER TOLD ME IT WOULD BE AROUND $1000 TO FIX OR I COULD PULL THE FUSE. EVERY PERSON IVE TALKED TO WITH A 99 SILVERADO HAS HAD THE EXACT SAME PROBLEM.
TL*- THE CONTACT STATED THAT THE 1999 CHEVROLET SILVERADO 1550 EXTENDED CAB ANTILOCK BRAKE PUMP CONTINUED TO COME ON AND STAY ON. HE HAD TO DISCONNECT THE ANTILOCK BRAKE PUMP ABOUT ONE MONTH AFTER HE PURCHASED THE VEHICLE. THE CONTACT STATED THAT THERE WAS RECALL O5V379000 FOR THE SERVICE BRAKES, HYDRAULIC: ANTILOCK. HE STA…
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TL*- THE CONTACT STATED THAT THE 1999 CHEVROLET SILVERADO 1550 EXTENDED CAB ANTILOCK BRAKE PUMP CONTINUED TO COME ON AND STAY ON. HE HAD TO DISCONNECT THE ANTILOCK BRAKE PUMP ABOUT ONE MONTH AFTER HE PURCHASED THE VEHICLE. THE CONTACT STATED THAT THERE WAS RECALL O5V379000 FOR THE SERVICE BRAKES, HYDRAULIC: ANTILOCK. HE STATED THAT THE RECALL WAS REPAIRED ABOUT SIX MONTHS AGO, THE PUMP ALREADY FAILED PRIOR TO RECALL. THE FAILURE MILEAGE WAS 61,150, AND THE CURRENT MILEAGE WAS 135,000.*AK THE 4 WHEEL DRIVE LIGHT STAYS ILLUMINATED AND THERE WAS A LEAK COMING FROM THE DRIVERS DOOR. UPDATE 05/04/07*TR
CONSTANT NOISE FROM UNDER DRIVERS SIDE ,HAD GM DEALER DIAGNOSE PROBLEM ($75),WAS TOLD ELECTRONIC BRAKE CONTROL MODULE HAD INTERNAL SHORT. EXT. WARRANTY WOULD NOT COVER THE $900.00 EXPENSE,CONTACTED GM CUSTOMER ASSISTANCE WHO SAID THEY COULD NOT HELP WITH PROBLEM,SHOWED NO CONCERN OVER THE SAFETY OF HAVING THE ABS SYSTEM WORKIN…
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CONSTANT NOISE FROM UNDER DRIVERS SIDE ,HAD GM DEALER DIAGNOSE PROBLEM ($75),WAS TOLD ELECTRONIC BRAKE CONTROL MODULE HAD INTERNAL SHORT. EXT. WARRANTY WOULD NOT COVER THE $900.00 EXPENSE,CONTACTED GM CUSTOMER ASSISTANCE WHO SAID THEY COULD NOT HELP WITH PROBLEM,SHOWED NO CONCERN OVER THE SAFETY OF HAVING THE ABS SYSTEM WORKING, DEALER TECH. ADVISED TO PULL FUSE. AM KNOW WITHOUT ABS BRAKES. FEEL GM SHOULD TAKE CARE OF THIS SAFETY ISSUE. *NM
ABS LIGHT CAME ON, THEN A ELECTRIC MOTOR SOUND FROM UNDER THE VEHICLE,TAKEN TO A DEALERSHIP, WAS A FAILED ABS MODULE. HAD TO BE REPLACED. THIS WAS THE SECOND TIME IN 6 YEAR THIS HAS BEEN REPLACED, THE FIRST TIME WAS COVERED BY WARRANTY, THIS TIME COAST 1180 DOLLARS TO REPLACE, I FEEL GM HAS A PROBLEM WITH THE SYSTEM, AND THIS SH…
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ABS LIGHT CAME ON, THEN A ELECTRIC MOTOR SOUND FROM UNDER THE VEHICLE,TAKEN TO A DEALERSHIP, WAS A FAILED ABS MODULE. HAD TO BE REPLACED. THIS WAS THE SECOND TIME IN 6 YEAR THIS HAS BEEN REPLACED, THE FIRST TIME WAS COVERED BY WARRANTY, THIS TIME COAST 1180 DOLLARS TO REPLACE, I FEEL GM HAS A PROBLEM WITH THE SYSTEM, AND THIS SHOULD BE A RECALL PROBLEM. *NM
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.