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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 →

When problems were reported

Mileage at the reported incident

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

What owners actually said

587 reports
42,000 miles · Jan 27, 2004
Service Brakes, Hydraulic

AFTER TURNING OFF MY TRUCK I HEARD THE ABS PUMP RUNNING AFTER REMOVING THE KEY. I CALLED THE DEALER AND WAS INFORMED THAT IT WAS A COMMON PROBLEM WITH THE ABS MODULE. *JB

NHTSA ODI #10055011

40,618 miles · Jan 14, 2004
Service Brakes, Hydraulic

MY 1999 CHEVROLET 1500 Z71 HAS HAD NUMEROUS ABS FAILURES. A FEW VERY CLOSE CALLS. THE DEALER OR MECHANIC HAVEN'T HEARD OF A RECALL. I UNDERSTAND THAT THE ABS MODULE IS TELLING THE SYSTEM THAT ONE WHEEL IS SLOWING DOWN AS IF A SKID ERRONEOUSLY WHICH ACTIVATES THE ABS TAKING THE DRIVER OUT OF THE EQUATION. SOMBODYS GOING TO DIE. …

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MY 1999 CHEVROLET 1500 Z71 HAS HAD NUMEROUS ABS FAILURES. A FEW VERY CLOSE CALLS. THE DEALER OR MECHANIC HAVEN'T HEARD OF A RECALL. I UNDERSTAND THAT THE ABS MODULE IS TELLING THE SYSTEM THAT ONE WHEEL IS SLOWING DOWN AS IF A SKID ERRONEOUSLY WHICH ACTIVATES THE ABS TAKING THE DRIVER OUT OF THE EQUATION. SOMBODYS GOING TO DIE. PLEASE FORWARD ANY INFO TO THE E-MAIL ADDRESS I LISTED . THANK YOU. *AK

NHTSA ODI #10053232

38,621 miles · Dec 2, 2003
Power TrainSuspension

WHILE DRIVING 60 MPH THE CONSUMER HEARD A LOUD RATTLING NOISE AND PULLED OVER. THE VEHICLE WAS TOWED TO THE DEALERSHIP WHERE THE MECHANIC INFORMED THE CONSUMER THAT THE PROBLEM WAS IN THE REAR END SUSPENSION. THE PROBLEM HAS NOT BEEN RESOLVED. *NLM *SCC THE DEALER REBUILT THE REAR DIFFERENTIAL. *JB

NHTSA ODI #10042272

Mileage unknown · Nov 19, 2003
Suspension

WHILE HAVING NEW TIRES PUT ON MECHANIC NOTICED THAT DRIVER'S SIDE BALL JOINTS FAILED AND NEEDED TO BE REPLACED. *AK

NHTSA ODI #10048243

Mileage unknown · Nov 13, 2003
Service Brakes, Hydraulic

CONSUMER APPLIED THE BRAKES AND THE BRAKE PEDAL WENT TO THE FLOOR. TOOK VEHICLE TO THE DEALER FOR ANALYSIS. THE MECHANIC COULD NOT RESOLVE THE PROBLEM. *AK

NHTSA ODI #10047946

56,000 miles · Oct 9, 2003
Service Brakes, Hydraulic

ABS MOTOR CONTROL UNIT FAILURE, AFTER SEEING MANY COMPLAINTS ON THE WEB I AM REPORTING IT HERE. ABS WARNING LIGHT CAME ON AND PUMP MOTOR STARTED RUNNING. EVEN WHEN TURNING OFF THE MOTOR, THE UNIT STILL RUNS. ABS FAILURE. HAD TO PULL FUSE TO STOP, NOW DRIVING WITHOUT ABS AND ABS AND BRAKE WARNING LIGHTS ARE ON. $1000 - $1500 TO R…

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ABS MOTOR CONTROL UNIT FAILURE, AFTER SEEING MANY COMPLAINTS ON THE WEB I AM REPORTING IT HERE. ABS WARNING LIGHT CAME ON AND PUMP MOTOR STARTED RUNNING. EVEN WHEN TURNING OFF THE MOTOR, THE UNIT STILL RUNS. ABS FAILURE. HAD TO PULL FUSE TO STOP, NOW DRIVING WITHOUT ABS AND ABS AND BRAKE WARNING LIGHTS ARE ON. $1000 - $1500 TO REPAIR PROBLEM, WILL MOST LIKELY DRIVE WITHOUT ABS FOR A LONG TIME. *LA

NHTSA ODI #10041535

Mileage unknown · Sep 23, 2003
Air BagsCrashInjury

WHILE DRIVING ABOUT 70 MPH ON THE HIGHWAY AND WITHOUT PRIOR WARNING DRIVER HIT A POTHOLE ON THE HIGHWAY CAUSING VEHICLE TO HYDROPLANE AND HIT A BRIDGE. UPON IMPACT, DUAL AIR BAGS DID NOT DEPLOY. DRIVER HIT HIS HEAD AND WAS TRANSPORTED TO THE HOSPITAL BY AMBULANCE, THERE WAS NO FATALITY.*AK

NHTSA ODI #10040456

50,548 miles · Sep 4, 2003
Service Brakes, Hydraulic

THE ABS MODUAL ON MY 1999 K1500 CHEVYROLET TRUCK HAS GONE BAD. THE PUMP STAYS ON AT ALL TIMES, UNLESS YOU PULL OUT THE FUSE FOR THE ABS. BY DISCONNECTING THE FUSE, THE ABS BRAKES ARE DISABLED FOR THE TRUCK. THIS ALSO LEAVES THE ABS LIGHT AND BRAKE LIGHT IN THE DASH ON. THE REPLACEMENT FOR THIS PART IS AROUND $1000. THIS APPEARS…

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THE ABS MODUAL ON MY 1999 K1500 CHEVYROLET TRUCK HAS GONE BAD. THE PUMP STAYS ON AT ALL TIMES, UNLESS YOU PULL OUT THE FUSE FOR THE ABS. BY DISCONNECTING THE FUSE, THE ABS BRAKES ARE DISABLED FOR THE TRUCK. THIS ALSO LEAVES THE ABS LIGHT AND BRAKE LIGHT IN THE DASH ON. THE REPLACEMENT FOR THIS PART IS AROUND $1000. THIS APPEARS TO BE A FAIRLY COMMON PROBLEM ON THIS MODEL TRUCK.MY FATHER IS HAVEING THE SAME LUCK WITH HIS 1999 K2500. NOTE THAT THE DEALER RECOMMENDED FIX, SHORT OF REPLACING THE UNIT, IS PULLING OUT THE FUSE. *AK

NHTSA ODI #10037224

47,400 miles · Aug 28, 2003
Service Brakes, Air

ABS BRAKE MODULE / MOTOR PUMP FAILURE ABS LIGHT COMES ON AND STAYS ON AND MOTOR UNDERNEATH TRUCK RUNS ALL THE TIME. HAD TO DISCONNECT THE 60 AMP FUSE TO STOP THE MOTOR /PUMP

NHTSA ODI #10036735

70,000 miles · Aug 15, 2003
Air BagsCrashInjury

WHILE TRAVELING ON THE HIGHWAY IN INCLEMENT WEATHER, THE VEHICLE HYDROPLANED, AND THEN HIT A BRIDGE. UPON IMPACT, THE DRIVER'S SIDE AIRBAG DIDN'T DEPLOY. *AK THE CRASH WAS HEAD ON AND THE VEHICLE FLIPPED OVER. IT WAS HIT A SECOND TIME AFTER BECOMING AIRBORNE AND LANDED UPSIDE DOWN. CONSUMER WAS HANGING UPSIDE DOWN UNTIL RE…

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WHILE TRAVELING ON THE HIGHWAY IN INCLEMENT WEATHER, THE VEHICLE HYDROPLANED, AND THEN HIT A BRIDGE. UPON IMPACT, THE DRIVER'S SIDE AIRBAG DIDN'T DEPLOY. *AK THE CRASH WAS HEAD ON AND THE VEHICLE FLIPPED OVER. IT WAS HIT A SECOND TIME AFTER BECOMING AIRBORNE AND LANDED UPSIDE DOWN. CONSUMER WAS HANGING UPSIDE DOWN UNTIL RESCUE OFFICIALS ARRIVED. VEHICLE WAS TOTALED. *PH *JB

NHTSA ODI #10024170

Official recalls

0

No 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

2

EA04011 · 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.