NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
614 reports102,000 miles · Dec 10, 2007
Service Brakes, Hydraulic
2000 CHEVY SILVERADO BRAKES WERE SQUEALING. CONSUMER STATES THAT THE REAR INSIDE BRAKE PAD WAS THE ONLY ONE WORN. MECHANIC INFORMED HIM THAT THIS WAS CAUSED BY ICE AND DIRT COLLECTED IN THE CALIPER. *KB CONSUMER SENT IN ADDITIONAL INFORMATION IN A VOQ. *KB UPDATED 04/14/08. *KB THE CONSUMER STATED ON 3 OCCASIONS, THE VEHICLE…
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2000 CHEVY SILVERADO BRAKES WERE SQUEALING. CONSUMER STATES THAT THE REAR INSIDE BRAKE PAD WAS THE ONLY ONE WORN. MECHANIC INFORMED HIM THAT THIS WAS CAUSED BY ICE AND DIRT COLLECTED IN THE CALIPER. *KB CONSUMER SENT IN ADDITIONAL INFORMATION IN A VOQ. *KB UPDATED 04/14/08. *KB THE CONSUMER STATED ON 3 OCCASIONS, THE VEHICLE LOST TRACTION WHILE DRIVING ON ICY ROADS . THE CONSUMER BELIEVED THE REASON FOR THE TRACTION LOSS, WAS DUE TO THE BRAKE PAD HANGING UP. *JB
NHTSA ODI #10211704
44,000 miles · Nov 29, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 30 MPH, THE CONTACT APPLIED THE BRAKES AND THE VEHICLE DID NOT STOP AND CONTINUED TO ROLL FORWARD AND THE ANTI-LOCK BEGAN TO PULSATE BUT NO BRAKING. HE ALMOST CRASHED INTO ANOTHER VEHICLE. THE DEALER STATED THAT THE FRONT WHEEL SPEED SENSOR FAILED AND DISABLED…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 30 MPH, THE CONTACT APPLIED THE BRAKES AND THE VEHICLE DID NOT STOP AND CONTINUED TO ROLL FORWARD AND THE ANTI-LOCK BEGAN TO PULSATE BUT NO BRAKING. HE ALMOST CRASHED INTO ANOTHER VEHICLE. THE DEALER STATED THAT THE FRONT WHEEL SPEED SENSOR FAILED AND DISABLED THE BRAKING SYSTEM. BOTH FRONT SPEED SENSORS WERE REPLACED. THE MANUFACTURER STATED THAT THE VEHICLE WAS NOT UNDER WARRANTY AND WOULD BE UNABLE TO ASSIST. THE CURRENT AND FAILURE MILEAGES WERE 44,000. UPDATED 01/17/08 *BF UPDATED 01/17/07 *TR
NHTSA ODI #10210277
103,000 miles · Nov 27, 2007
Steering
MY 2000 CHEVY HAS A KNOCKING NOISE COMING FROM THE STEERING WHEEL. *TR
NHTSA ODI #10210142
74,688 miles · Nov 12, 2007
Service Brakes, Hydraulic
ON OCTOBER 28TH, 2007 I PUT ON MY BRAKES TO STOP AND THE BRAKE LINES BLOW OUT AND I COULDN'T STOP AS QUICKLY AS I SHOULD HAVE. THE BRAKE FLUID DRAINED OUT OF THE LINES DUE TO THE RUPTURE. I HAD THE VEHICLE TOWED AND THE BRAKE LINES REPLACED AT A CHEVY DEALERSHIP. I WOULD HATE TO THINK IF A PEDESTRIAN HAD RUN OUT IN FRONT OF M…
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ON OCTOBER 28TH, 2007 I PUT ON MY BRAKES TO STOP AND THE BRAKE LINES BLOW OUT AND I COULDN'T STOP AS QUICKLY AS I SHOULD HAVE. THE BRAKE FLUID DRAINED OUT OF THE LINES DUE TO THE RUPTURE. I HAD THE VEHICLE TOWED AND THE BRAKE LINES REPLACED AT A CHEVY DEALERSHIP. I WOULD HATE TO THINK IF A PEDESTRIAN HAD RUN OUT IN FRONT OF ME, WHAT MAY HAVE HAPPENED! *TR
NHTSA ODI #10208685
Mileage unknown · Nov 11, 2007
Fuel System, Other
FUEL GAUGE ALTERNATES BETWEEN FULL AND EMPTY WITH LOW FUEL LIGHT WHEN EMPTY PURCHASED USED RECENTLY. *TR
NHTSA ODI #10208613
49,000 miles · Oct 23, 2007
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHEN THE VEHICLE IS COLD AND IS STARTED, THE ENGINE KNOCKS FROM THIRTY SECONDS TO ONE MINUTE. ONCE THE VEHICLE HAS WARMED, THE KNOCKING STOPS. GENERAL MOTORS STATED THAT THIS WAS CHARACTERISTIC OF THE VEHICLE AND IS KNOWN AS ENGINE KNOCK COLD START, OR CARBON BUILD UP ON TH…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHEN THE VEHICLE IS COLD AND IS STARTED, THE ENGINE KNOCKS FROM THIRTY SECONDS TO ONE MINUTE. ONCE THE VEHICLE HAS WARMED, THE KNOCKING STOPS. GENERAL MOTORS STATED THAT THIS WAS CHARACTERISTIC OF THE VEHICLE AND IS KNOWN AS ENGINE KNOCK COLD START, OR CARBON BUILD UP ON THE PISTON HEAD. THE CONTACT WAS INFORMED THAT THE REPAIR WOULD BE HIS RESPONSIBILITY. THE CURRENT MILEAGE WAS 50,000 AND FAILURE MILEAGE WAS 49,000.
NHTSA ODI #10206678
117,000 miles · Oct 21, 2007
Service Brakes, Air
I OWN A 2000 CHEVEROLET SILVERADO 1500 4WD PICKUP. IT IS AN EXTENDED CAB SHORTBED, WITH THE 5.3L ENGINE AND AUTOMATIC TRANSMISSION. THE ABS BRAKES ENGAGE WHEN APPLYING THE BRAKES AT SLOW SPEEDS. THE TRUCK THEN CONTINUES TO MOVE AND IS EXTREMELY DIFFICULT TO STOP. WHEN THE ABS ENGAGES IT IS ALWAYS AT LOW SPEEDS (LESS THAN 10MPH…
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I OWN A 2000 CHEVEROLET SILVERADO 1500 4WD PICKUP. IT IS AN EXTENDED CAB SHORTBED, WITH THE 5.3L ENGINE AND AUTOMATIC TRANSMISSION. THE ABS BRAKES ENGAGE WHEN APPLYING THE BRAKES AT SLOW SPEEDS. THE TRUCK THEN CONTINUES TO MOVE AND IS EXTREMELY DIFFICULT TO STOP. WHEN THE ABS ENGAGES IT IS ALWAYS AT LOW SPEEDS (LESS THAN 10MPH) AND DOES SO REGARDLESS OF DRIVING CONDITIONS AND ROAD SURFACE CONDITIONS. THE STOPPING DISTANCE IS DANGEROUSLY INCREASED. I HAVE NOT HAD AN ACCIDENT YET, BUT COME VERY CLOSE. I HAVE RESEARCHED THIS PROBLEM AND LEARNED THAT IT IS VERY COMMON. GM ISSUED A TECHNICAL SERVICE BULLETIN IN THE US,TSB#03-05-25-007A) AND A RECALL IN CANADA FOR THIS EXACT PROBLEM. THE PROBLEM IS DUE TO DEBRI AND OR RUST ON THE FRONT WHEEL SPEED SENSORS. I PLAN TO UNPLUG MY ABS FUSE UNTIL I AM ABLE TO PERFORM THE PROCEDURE LISTED IN THE TECHNICAL SERVICE BULLETIN. I FIND IT VERY NEGLIGENT OF GM TO NOT NOTIFY OWNERS OF MODELS AFFECTED BY THIS PROBLEM AND NOT ENCOURAGE THEIR DEALER NETWORK TO NOTIFY OWNERS OF VEHICLES AFFECTED BY THIS PROBLEM. FAILING TO STOP IN TIME, EVEN AT LOW SPEEDS, CAN EASILY CAUSE PROPERTY AND VEHICLE DAMAGE, PERSONAL INJURY AND DEATH. THANK YOU, SCOTT BEAN *TR
NHTSA ODI #10206478
54,090 miles · Oct 15, 2007
Service Brakes, HydraulicCrash
UPON ENTERING PARKING SPACE AT WORK ABS SYSTEM CAME ON FOR NO REASON CAUSING VEHICLE TO LUNGE FORWARD THREW FENCE. *JB
NHTSA ODI #10205776
59,500 miles · Oct 10, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 3 MPH AND APPROACHING A STOP, THE ABS ENGAGED AND THE VEHICLE MADE A NOISE. AS A RESULT, THE VEHICLE FAILS TO STOP PROPERLY AND THE STOPPING DISTANCE HAS INCREASED. THE FAILURE HAS OCCURRED ON TWELVE OCCASIONS. HE HAS TAKEN THE VEHICLE TO THE DE…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 3 MPH AND APPROACHING A STOP, THE ABS ENGAGED AND THE VEHICLE MADE A NOISE. AS A RESULT, THE VEHICLE FAILS TO STOP PROPERLY AND THE STOPPING DISTANCE HAS INCREASED. THE FAILURE HAS OCCURRED ON TWELVE OCCASIONS. HE HAS TAKEN THE VEHICLE TO THE DEALER FOR INSPECTION. A RECALL REPAIR FOR NHTSA CAMPAIGN ID NUMBER 05V379000 WAS PERFORMED ON THE VEHICLE IN JUNE OF 2006. THE CURRENT MILEAGE WAS 60,000 AND FAILURE MILEAGE WAS 59,500. UPDATED 10/31/07 *TR
NHTSA ODI #10205367
81,989 miles · Sep 28, 2007
StructureTiresCrashInjury
THE SPARE TIRE FELL OFF OF MY 2000 CHEVROLET 1500 PICKUP TRUCK AND ROLLED INTO A SCHOOL BUS. THESE TIRES ARE SECURED UNDERTHE REAR OF THE TRUCK BY THE SAME TYPE OF CABLE THAT WAS INVOLVED IN THE ON GOING TAIL GATE CABLE RECALL. ALL CHEV AND GMC PICKUPS HAVE THESE DEFECTIVE CABLES HOLDING THE SPARES TIRE AND THEY ALL ARE EVENTUAL…
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THE SPARE TIRE FELL OFF OF MY 2000 CHEVROLET 1500 PICKUP TRUCK AND ROLLED INTO A SCHOOL BUS. THESE TIRES ARE SECURED UNDERTHE REAR OF THE TRUCK BY THE SAME TYPE OF CABLE THAT WAS INVOLVED IN THE ON GOING TAIL GATE CABLE RECALL. ALL CHEV AND GMC PICKUPS HAVE THESE DEFECTIVE CABLES HOLDING THE SPARES TIRE AND THEY ALL ARE EVENTUALLY GOING TO FAIL . *TR
NHTSA ODI #10204338
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.
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