IllustrationWHEN THE CONSUMER DROVE OVER 5 MPH THE WHEEL SENSOR KICKED IN AND THE VEHICLE WILL NOT STOP. THE CONSUMER HAD THE BRAKES SERVICED. *JB THE CONSUMER STATED THAT THE SENSOR IN THE WHEEL BEARING WAS REPORTING BAD INFORMATION. ALL BRAKES WHERE REPLACED AND THE PROBLEM STILL EXISTED. *TC
2001 Chevrolet Silverado 1500
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2001 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
290–25K
3825–50K
7150–75K
8075–100K
102100–150K
65150K+
385 reports with mileage · 83 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 147 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 133 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Fuel System, Gasoline. Review the 32 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
48 crash reports5 fire reports20 injury reports
What owners actually said
468 reportsRECEIVED RECALL REPLACE GALVANIZED SUPPORT CABLES WITH STAINLESS STEEL CABLES, DEALER REFUSE TO REPAIR UNDER WARRANTY. *BF *TC
BATTERY FAILURE, FRONT AND REAR ROTORS PROBLEM. * BF
PARKING BRAKES ON A 2001 CHEVROLET SILVERADO. I HAVE 42000 MILES AND THIS IS THE SECOND TIME THE PARKING BRAKES WORE OUT PREMATURALLY. HAVE NEVER BEEN ABUSED AND USE NORMALLY. THE FIRST TIME AROUND AT 21000 MILES. PARKING BRAKES LINNING ARE WORN BEYOND RECOMMENDED THICKNESS AND CANNOT HOLD THE VEHICLE. FIRST TIME I REPLACED THE …
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PARKING BRAKES ON A 2001 CHEVROLET SILVERADO. I HAVE 42000 MILES AND THIS IS THE SECOND TIME THE PARKING BRAKES WORE OUT PREMATURALLY. HAVE NEVER BEEN ABUSED AND USE NORMALLY. THE FIRST TIME AROUND AT 21000 MILES. PARKING BRAKES LINNING ARE WORN BEYOND RECOMMENDED THICKNESS AND CANNOT HOLD THE VEHICLE. FIRST TIME I REPLACED THE LINNINGS AND WILL AGAIN HAVE TO PLACE THE LININGS. NEVER TOLD ABOUT PREMATURE LINING FAILURE WHEN I PURCHASED THE FIRST SET.I DON'T BELIVE PARKING BRAKE LINING SHOULD WEAR OUT AT 20000 MILES.*AK
PARKING BRAKE, DAY TIME RUNNING LIGHTS, O2 SENSOR, UEL GAUGE . *AK
THE CONSUMER TOOK THE VEHICLE TO DEALER TO HAVE THE TIRES ROTATED, WHEN IT WAS DISCOVERED THAT THE ROTORS RUSTED AND THE PADS NEEDED TO BE REPLACED. THE CONSUMER MAD COMPLAINT WITH THE MANUFACTURER SINCE THIS WAS THE FIRST SERVICING SINCE THE CONSUMER PURCHASED THE VEHICLE. THE CONSUMER IS AWARE OF OTHER VEHICLES WITH SIMILA…
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THE CONSUMER TOOK THE VEHICLE TO DEALER TO HAVE THE TIRES ROTATED, WHEN IT WAS DISCOVERED THAT THE ROTORS RUSTED AND THE PADS NEEDED TO BE REPLACED. THE CONSUMER MAD COMPLAINT WITH THE MANUFACTURER SINCE THIS WAS THE FIRST SERVICING SINCE THE CONSUMER PURCHASED THE VEHICLE. THE CONSUMER IS AWARE OF OTHER VEHICLES WITH SIMILAR PROBLEMS. *AK THERE WAS EXTENSIVE RUSTING AND PITTING OF THE BRAKE SYSTEM. *SC
PARKING BRAKE HASN'T WORKED SINCE AROUND 20000 MILES, BRAKE WILL DEPRESS, BUT WON'T KEEP TRUCK FROM ROLLING. LOUD PISTON SLAP, KNOCKING FROM ENGINE MOSTLY WHEN ENGINE IS COLD, GOES AWAY AFTER WARMED UP. THIS IS A Z71 AND THE 4 WHEEL DRIVE BUTTONS DO NOT WORK ALL THE TIME WHEN TRYING TO PUT INTO 4 WHEEL DRIVE. POWER MIRRORS DON'T…
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PARKING BRAKE HASN'T WORKED SINCE AROUND 20000 MILES, BRAKE WILL DEPRESS, BUT WON'T KEEP TRUCK FROM ROLLING. LOUD PISTON SLAP, KNOCKING FROM ENGINE MOSTLY WHEN ENGINE IS COLD, GOES AWAY AFTER WARMED UP. THIS IS A Z71 AND THE 4 WHEEL DRIVE BUTTONS DO NOT WORK ALL THE TIME WHEN TRYING TO PUT INTO 4 WHEEL DRIVE. POWER MIRRORS DON'T WORK A LOT OF THE TIME. AT LEAST ONE OF THE FRONT RUNNING LIGHTS STAY BURNED OUT MOST OF THE TIME. TRUCK IS OUT OF WARRANTY NOW BUT THESE PROBLEMS HAVE EXISTED FOR A LONG TIME. A LOT OF OTHER TRUCKS OF THIS SAME MODEL HAVE ALL THE SAME PROBLEMS. GM SHOULD ADDRESS THESE PROBLEMS AND MAKE THEM RIGHT AT NO COST TO THE CONSUMER.*AK
WHILE MAKING A TURN REAR END LOCKED UP. THIS CAUSED THE VEHICLE TO PULL HARD, SKID, AND COME TO AN ABRUPT HALT. THIS PROBLEM WAS DUE TO REAR DIFFERENTIAL FAILURE.*AK
THE FUEL GAUGE ON MY TRUCK DOES NOT READ RIGHT. IT STICKS ONE MINUTE ONE WAY , THEN IT WILL SAY I HAVE A FULL TANK, AND THEN DROP TO EMPTY. I AM AFRAID I AM GONNA BE STRANDED ONE DAY, BEING A WOMAN WITH CHILDREN AND CONSTANTLY ON THE ROAD, THIS SCARES ME. I HAVE A 2001 1500HD CHEVROLET 4 DOOR TRUCK. IT IS NOT THAT OLD TO HAVE PR…
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THE FUEL GAUGE ON MY TRUCK DOES NOT READ RIGHT. IT STICKS ONE MINUTE ONE WAY , THEN IT WILL SAY I HAVE A FULL TANK, AND THEN DROP TO EMPTY. I AM AFRAID I AM GONNA BE STRANDED ONE DAY, BEING A WOMAN WITH CHILDREN AND CONSTANTLY ON THE ROAD, THIS SCARES ME. I HAVE A 2001 1500HD CHEVROLET 4 DOOR TRUCK. IT IS NOT THAT OLD TO HAVE PROBLEMS WITH THIS. I AM CONCERNED OVER IT BECAUSE MY HUSBAND HAS A 2000 CHEVROLET 2500HD AND THE SAME THING HAPPENED,ONE OF THE GUYS THAT WORKS FOR SAME COMPANY AND HAS TRUCK ALIKE, HAD TO TAKE HIS IN AND GET IT FIXED FOR SAME REASON,THEN I WAS TELLING OUR FRIENDS ABOUT IT AND SAYS THEIRS DOES THE SAME THING. ALL CHEVROLETS, AND SO WE GOT TO THINKING MAYBE THIS IS SOMETHING THAT NEEDS TO BE CHECKED INTO.I AM GONNA HAVE TO GET MINE FIXED SHORTLY BECAUSE OF THE FEAR OF BEING STRANDED, I TRY TO KEEP UP WITH WHEN I PUT GAS IN AND THE MILEAGE, BUT SOMETIMES YOU JUST FORGET!! PLEASE LET ME KNOW IF THIS IS A RECALL PROBLEM OR COULD BE IN THE FUTURE. WE WERE JUST WONDERING@ THANKS!
FAULTY ABS MODULE; ABS PUMP KEPT RUNNING AFTER ENGINE IGNITION TURNED OFF. PART 88982296.*AK
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.