IllustrationPARKING BRAKE FAILURE. GM PUT OUT RECALL FOR MANUAL TRANSMISSION VEHICLES BUT NOT AUTO TRANS. TRUCK WOULD NOT PASS STATE INSPECTION. TOOK TO DEALER AND PAID TO HAVE IT FIXED. *JB
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 reportsDT*: THE CONTACT STATED WHILE DRIVING VARIOUS SPEEDS, A GRINDING NOISE WAS HEARD. THE VEHICLE WAS DRIVEN TO AN INDEPENDENT REPAIR SHOP, WHO DETERMINED THE PARKING BRAKE WAS METAL TO METAL. THE ROTORS WERE SHAVED AND THE PADS WERE REPLACED. THE DEALER WAS NOT CONTACTED. UPDATED 1/19/2007 - THE EMERGENCY BRAKE PADS WERE COMP…
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DT*: THE CONTACT STATED WHILE DRIVING VARIOUS SPEEDS, A GRINDING NOISE WAS HEARD. THE VEHICLE WAS DRIVEN TO AN INDEPENDENT REPAIR SHOP, WHO DETERMINED THE PARKING BRAKE WAS METAL TO METAL. THE ROTORS WERE SHAVED AND THE PADS WERE REPLACED. THE DEALER WAS NOT CONTACTED. UPDATED 1/19/2007 - THE EMERGENCY BRAKE PADS WERE COMPLETELY WORN. THE PADS ON THE REGULAR BRAKES STILL HAD OVER 50% USE LEFT. THE CONSUMER CLAIMED THAT HE ONLY USED THE EMERGENCY BRAKE TWICE. THE BRAKES ARE NOT SELF ADJUSTING BUT HAVE TO BE ADJUSTED MANUALLY. *NM
FUEL GAUGE MOVES FROM EMPTY TO FULL AND BACK AGAIN WHILE DRIVING, AND AT TIMES FAILS TO WORK AT ALL. AFTER TAKING IT TO A DEALER FOR REPAIR, THE MECHANIC TOLD ME TO SAVE MY MONEY THAT IT WOULD ONLY GO OUT AGIN, THAT THIS WAS A COMMON PROBLEM WITH THIS MODEL THAT GM HAS JUST IGNORDED. I HAVE SINCE SPOKEN WITH OTHER CHEVY OWNERS…
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FUEL GAUGE MOVES FROM EMPTY TO FULL AND BACK AGAIN WHILE DRIVING, AND AT TIMES FAILS TO WORK AT ALL. AFTER TAKING IT TO A DEALER FOR REPAIR, THE MECHANIC TOLD ME TO SAVE MY MONEY THAT IT WOULD ONLY GO OUT AGIN, THAT THIS WAS A COMMON PROBLEM WITH THIS MODEL THAT GM HAS JUST IGNORDED. I HAVE SINCE SPOKEN WITH OTHER CHEVY OWNERS WHO HAVE THE SAME PROBLEM. *JB
MY 2001 Z71 SILVERADO HAS HAD THE STEERING SECTOR LUBRICATED TWICE BECAUSE OF LOUD BUMPING. *NM
MY 2001 CHEVY SILVERADO GAS GAUGE IS ERRATIC. GOES BETWEEN FULL AND EMPTY OR NOT WORK AT ALL. RAN OUT OF GAS AND ENGINE STALLED , LOST POWER BRAKES TO STOP. THIS PROBLEM STARTED LESS THAN 1000 MILES AFTER WARRANTY EXPIRED. SHOULD BE A RECALL ISSUE AS THERE ARE FORUMS ON INTERNET WITH PEOPLE WITH THE SAME PROBLEM. DEALER SAYS IT …
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MY 2001 CHEVY SILVERADO GAS GAUGE IS ERRATIC. GOES BETWEEN FULL AND EMPTY OR NOT WORK AT ALL. RAN OUT OF GAS AND ENGINE STALLED , LOST POWER BRAKES TO STOP. THIS PROBLEM STARTED LESS THAN 1000 MILES AFTER WARRANTY EXPIRED. SHOULD BE A RECALL ISSUE AS THERE ARE FORUMS ON INTERNET WITH PEOPLE WITH THE SAME PROBLEM. DEALER SAYS IT IS BAD SENDING UNIT AND WILL REPLACE FOR $800. *JB
THE PARKING BRAKE IS WORN OFF. IT DID NOT PASS THE STATE INSPECTION AND NOW IT WILL COST ME ABOUT $350 DOLLARS TO GET SOMETHING FIX THAT GM SHOULD RECALL. NOT BEING ABLE TO USE THE PARKING BRAKE COULD OF BEING VERY DANGEROUS TO MY FAMILY IN CASE NEEDED. THANK GOD THIS DID NOT HAPPEN. PLEASE REPORT THIS TO GM AND HAVE THEM DO SOM…
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THE PARKING BRAKE IS WORN OFF. IT DID NOT PASS THE STATE INSPECTION AND NOW IT WILL COST ME ABOUT $350 DOLLARS TO GET SOMETHING FIX THAT GM SHOULD RECALL. NOT BEING ABLE TO USE THE PARKING BRAKE COULD OF BEING VERY DANGEROUS TO MY FAMILY IN CASE NEEDED. THANK GOD THIS DID NOT HAPPEN. PLEASE REPORT THIS TO GM AND HAVE THEM DO SOMETHING. THANKS. *JB
DT*: THE CONTACT STATED WHILE DRIVING 70 MPH, THE TRANSMISSION BURNED UP. THE TORQUE CONVERTER HAD RUBBED ON THE TRANSMISSION. THE VEHICLE WAS TAKEN TO A SERVICE DEALER, WHO DETERMINED THE TORQUE CONVERTER HAD BURNED UP AND NEEDED TO BE REPLACED. UPDATED 10/23/06. *JB
THE STEERING SHAFT MID-JOINT IS LOOSE AND IS MAKING A KNOCKING SOUND, THE FUEL GAUGE IS MOVING FROM FULL TO EMPTY WHILE TRAVELING DOWN THE HIGHWAY, THE POWER WINDOWS ARE LOSING POWER, WHEN YOU POWER UP THE WINDOWS THE HEADLIGHTS DIM AND THE WINDOWS GO UP SO SLOW
2001 SILVERADO Z71 5.3L -- THE GAS GAUGE WORKS ONLY INTERMITTENTLY AND OFTEN SHOWS WRONG FUEL LEVEL. I HAVE TALKED TO MY MECHANIC AND HE SAYS THAT THIS IS A COMMON PROBLEM AND A COSTLY ONE TO FIX. I USE MY TRIPOMETER TO ESTIMATE HOW MUCH FUEL I HAVE BUT IF THE FUEL MILEAGE CHANGES, AS WITH TOWING, IT IS NOT RELIABLE. I HAVE…
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2001 SILVERADO Z71 5.3L -- THE GAS GAUGE WORKS ONLY INTERMITTENTLY AND OFTEN SHOWS WRONG FUEL LEVEL. I HAVE TALKED TO MY MECHANIC AND HE SAYS THAT THIS IS A COMMON PROBLEM AND A COSTLY ONE TO FIX. I USE MY TRIPOMETER TO ESTIMATE HOW MUCH FUEL I HAVE BUT IF THE FUEL MILEAGE CHANGES, AS WITH TOWING, IT IS NOT RELIABLE. I HAVE RUN OUT OF FUEL AND BEEN STRANDED ON MORE THAN ONE OCCASION. *JB
I BELIEVE GM SHOULD RELEASE A TSB & REPAIR UNDER WARRANTY TO ADDRESS THE POOR QUALITY FUEL SENDING UNITS IN ALL 1999-2001 PICKUPS. MY 1999 SILVERADO DEVELOPED A FAULTY GAUGE READING APPROX 50,000. MY 2001 HAPPENED ABOUT THE SAME MILEAGE & AGE. THE DEALER SERVICE MANAGER TRIED TO SAY IT WAS BAD GAS. I KNOW BETTER. I HAVE 3 FRIEND…
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I BELIEVE GM SHOULD RELEASE A TSB & REPAIR UNDER WARRANTY TO ADDRESS THE POOR QUALITY FUEL SENDING UNITS IN ALL 1999-2001 PICKUPS. MY 1999 SILVERADO DEVELOPED A FAULTY GAUGE READING APPROX 50,000. MY 2001 HAPPENED ABOUT THE SAME MILEAGE & AGE. THE DEALER SERVICE MANAGER TRIED TO SAY IT WAS BAD GAS. I KNOW BETTER. I HAVE 3 FRIENDS WITH SILVERADO'S & ALL DEVELOPED ERRATIC GAUGE READINGS. *JB
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.