NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
158 reports70,000 miles · Jun 19, 2007
Steering
TL*THE CONTACT OWNS A 1999 GMC SIERRA 1500. ON JUNE 19, 2007, THE POWER STEERING PUMP FAILED. THE POWER PUMP FLUID WAS FULL AT THE TIME OF FAILURE. WHILE DRIVING, THE POWER STEERING PRODUCED A VERY LOUD NOISE WHEN THE WHEEL WAS TURNED. THE NOISE CONTINUED TO INTENSIFY BEFORE THE PUMP FINALLY FAILED. THE PURCHASE DATE WAS UN…
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TL*THE CONTACT OWNS A 1999 GMC SIERRA 1500. ON JUNE 19, 2007, THE POWER STEERING PUMP FAILED. THE POWER PUMP FLUID WAS FULL AT THE TIME OF FAILURE. WHILE DRIVING, THE POWER STEERING PRODUCED A VERY LOUD NOISE WHEN THE WHEEL WAS TURNED. THE NOISE CONTINUED TO INTENSIFY BEFORE THE PUMP FINALLY FAILED. THE PURCHASE DATE WAS UNKNOWN. THE CURRENT AND FAILURE MILEAGES WERE 70,000.
NHTSA ODI #10193690
80,000 miles · May 18, 2007
Seats
TL*THE CONTACT OWNS A 1999 GMC SIERRA 1500. THE CONTACT STATED THAT THE DRIVER'S SEAT IS LOOSE. WHEN HE DEPRESSES THE BRAKE PEDAL, THE SEAT MOVES FORWARD. WHEN HE DEPRESSES THE ACCELERATOR PEDAL, THE SEAT MOVES BACKWARDS. HE FIRST NOTICED THE FAILURE APPROXIMATELY ONE YEAR AGO AND THE FAILURE HAS SINCE WORSENED. THE DEALER …
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TL*THE CONTACT OWNS A 1999 GMC SIERRA 1500. THE CONTACT STATED THAT THE DRIVER'S SEAT IS LOOSE. WHEN HE DEPRESSES THE BRAKE PEDAL, THE SEAT MOVES FORWARD. WHEN HE DEPRESSES THE ACCELERATOR PEDAL, THE SEAT MOVES BACKWARDS. HE FIRST NOTICED THE FAILURE APPROXIMATELY ONE YEAR AGO AND THE FAILURE HAS SINCE WORSENED. THE DEALER STATED THAT THE CONTACT WOULD HAVE TO PAY FOR THE REPAIR BECAUSE THERE IS NO RECALL FOR THE FAILURE. THE ENGINE SIZE WAS UNKNOWN. THE CURRENT MILEAGE IS 93,000 AND FAILURE MILEAGE WAS 80,000.
NHTSA ODI #10191166
15,000 miles · Apr 19, 2007
Seat BeltsSeats
TL*THE CONTACT OWNS A 1999 GMC SIERRA EXTENDED CAB. HE RECEIVED A RECALL NOTICE FROM THE MANUFACTURER TO REPAIR AND REPLACE THE DRIVER AND PASSENGER SIDE SEAT BELT. THE RECALL REPAIR WAS COMPLETED 06/21/06 AND STATED THAT THE SEAT BELTS WORKED FOR TWO MONTHS. ON 08/2006 THE DRIVER SIDE SEAT BELT FAILED. THE CONTACT IS UNABLE…
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TL*THE CONTACT OWNS A 1999 GMC SIERRA EXTENDED CAB. HE RECEIVED A RECALL NOTICE FROM THE MANUFACTURER TO REPAIR AND REPLACE THE DRIVER AND PASSENGER SIDE SEAT BELT. THE RECALL REPAIR WAS COMPLETED 06/21/06 AND STATED THAT THE SEAT BELTS WORKED FOR TWO MONTHS. ON 08/2006 THE DRIVER SIDE SEAT BELT FAILED. THE CONTACT IS UNABLE TO LOCK THE SEAT BELT DUE TO IT BEING LODGED INTO THE SEAT CUSHION. TWO MONTHS AFTER THE SEAT BELT STOPPED OPERATING NORMALLY. WHILE DRIVING THE VEHICLE THE SEAT CUSHION SEPARATED, DROPPED TO THE FLOOR AND BOTH ARM REST ON THE PASSENGER AND DRIVER SIDE FELL OFF OF THE SEAT. THE DEALER STATED THAT HE WAS RESPONSIBLE FOR REPLACING THE SEAT BELT. THE COST OF THE SEAT BELT WAS $75.00 AND THE SEAT CUSHION WAS $500.00. THE CONTACT FILED A COMPLAINT WITH GMC?S CONSUMER ASSISTANCE CENTER AND WAS GIVEN CASE# 71-494868469. THE FAILURE MILEAGE WAS 15000 AND THE CURRENT MILEAGE WAS 169000.
NHTSA ODI #10188370
37,594 miles · Feb 22, 2007
Service Brakes, Hydraulic
02/22/2007 BRAKE PRESSURE MODULE VALVE (ABS) FAILED. *CC *NM
NHTSA ODI #10184774
8,500 miles · Jan 8, 2007
Fuel System, Gasoline
THE FIRST TIME I BOUGHT THE VEHICLE IT OVERFLOWED FUEL WHEN I FILLED THE FUEL TANK TO IT'S CAPACITY. I ASSUMED A VENT LINE WAS LOOSE, BUT KNEW IT WOULD BE A BIG JOB TO DROP THE FUEL TANK AND CHECK, SO I JUST LIMITED THE AMOUNT OF FUEL I WOULD FILL THE TANK WITH. ON JAN 5, 2007, THE FUEL PUMP QUIT WORKING AND AFTER DROPPING THE T…
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THE FIRST TIME I BOUGHT THE VEHICLE IT OVERFLOWED FUEL WHEN I FILLED THE FUEL TANK TO IT'S CAPACITY. I ASSUMED A VENT LINE WAS LOOSE, BUT KNEW IT WOULD BE A BIG JOB TO DROP THE FUEL TANK AND CHECK, SO I JUST LIMITED THE AMOUNT OF FUEL I WOULD FILL THE TANK WITH. ON JAN 5, 2007, THE FUEL PUMP QUIT WORKING AND AFTER DROPPING THE TANK NO VENT LINE WAS FOUND TO BE LOOSE. UPON FURTHER INVESTIGATION, I DETERMINED THE FUEL PUMP MOUNTING FLANGE ON THE TANK WAS ABOUT HALF CONNECTED, THUS WHERE THE FUEL WOULD LEAK FROM WHEN THE TANK WAS FILLED TO CAPACITY. IT APPEARED THE MOUNTING FLANGE IS FUSED ON AND THERE WAS NOT AN ADEQUATE BON MADE. IT WAS ON ABOUT 1/32" WIDE FOR 180 DEGREES AND ONLY ABOUT 1/16" WIDE THE OTHER 180 DEGREES. I HAVE SINCE REPAIRED THE TANK USING A PRODUCT CALLED JB WELD AND ALSO INSTALLING (4) #10 MACHINES SCREWS WITH WASHERS AND LOCKING NUTS HOLDING THE FLANGE TO THE TANK. *JB
NHTSA ODI #10178075
60,000 miles · Dec 15, 2006
Power Train
AFTER THE WARRANTY RAN OUT AND AT ABOUT 60,000 MILES THE TRANSMISSION STARTED SHIFTING HARD FROM FIRST TO SECOND GEAR. THE CHECK ENGINE LIGHT STARTED COMING ON INTERMITTENTLY. WHEN THE ENGINE CODE WAS CHECKED IT WAS THE 1870 TRANSMISSION SLIPPAGE CODE. AFTER CHECKING ONLINE THERE WERE HUNDREDS OF OTHER CUSTOMERS WITH THE SAME…
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AFTER THE WARRANTY RAN OUT AND AT ABOUT 60,000 MILES THE TRANSMISSION STARTED SHIFTING HARD FROM FIRST TO SECOND GEAR. THE CHECK ENGINE LIGHT STARTED COMING ON INTERMITTENTLY. WHEN THE ENGINE CODE WAS CHECKED IT WAS THE 1870 TRANSMISSION SLIPPAGE CODE. AFTER CHECKING ONLINE THERE WERE HUNDREDS OF OTHER CUSTOMERS WITH THE SAME PROBLEM. I TOOK IT TO THE DEALER AFTER THE CONDITION WORSENED AND THE DEALER RECOMMENDED REPLACING THE TRANSMISSION WITHOUT EVEN SEEING THE PROBLEM DUPLICATED. THIS SHOULD HAVE BEEN A RECALL ITEM YEARS AGO. I HAVE HAD TO REPLACE THE ELECTRONIC FUEL PUMP TWICE. ONLINE THERE WERE NUMBERS OF CUSTOMERS WITH THIS SAVE REPLACEMENT PROBLEM. I HAVE AN OLDER VEHICLE THAT HAVE NEVER HAD THE FUEL PUMP REPLACED. *NM
NHTSA ODI #10176237
45,000 miles · Dec 12, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED WHILE DRIVING 25 MPH, THE BRAKE PEDAL WAS MUSHY WHEN DEPRESSED, AND THE STOPPING DISTANCE WAS EXTENDED. THIS WAS ACCOMPANIED BY A CLACKING NOISE IN THE FRONT END. UPON INSPECTION, IT WAS NOTED THAT BRAKE FLUID WAS LEAKING FROM THE UNDERSIDE OF THE VEHICLE BELOW THE DRIVER'S SEAT. THE VEHICLE WAS NOT S…
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DT*: THE CONTACT STATED WHILE DRIVING 25 MPH, THE BRAKE PEDAL WAS MUSHY WHEN DEPRESSED, AND THE STOPPING DISTANCE WAS EXTENDED. THIS WAS ACCOMPANIED BY A CLACKING NOISE IN THE FRONT END. UPON INSPECTION, IT WAS NOTED THAT BRAKE FLUID WAS LEAKING FROM THE UNDERSIDE OF THE VEHICLE BELOW THE DRIVER'S SEAT. THE VEHICLE WAS NOT SEEN BY A DEALER FOR THIS INCIDENT, HOWEVER THE VEHICLE HAD PREVIOUSLY BEEN TAKEN TO A PRIVATE REPAIR SHOP, WHERE THEY NOTED THAT THE CALIPER FITTINGS AROUND THE BRAKE SHOES WERE CORRODED. THE BRAKE LINE FITTINGS WERE REPLACED, WHICH CORRECTED THE CORROSION. THE MANUFACTURER WAS ALSO NOTIFIED. THERE WAS A NHTSA RECALL# 00V345000, WHICH PERTAINS TO THE PIPING AND FITTINGS ON THE SERVICE BRAKES. THE VEHICLE WAS NOT INCLUDED IN THE RECALL DUE TO THE VIN.
NHTSA ODI #10175909
107,788 miles · Oct 29, 2006
Parking Brake
PARKING BRAKE DID NOT HOLD ALLOWING VEHICLE TO ROLL AWAY AND STRIKE PARKING BARRIER. REPAIRS WERE MADE TOTALING $434.37 PARTS REPLACED WERE, RUSTING PARKING BRAKE BACKING PLATES, PARKING BRAKE SHOES AND RELATED HARDWARE. *NM
NHTSA ODI #10172088
Mileage unknown · Oct 12, 2006
Service Brakes, Hydraulic
FAX FROM (FL) RE DEFECTIVE BRAKES ON HIS 1999 GMC SIERRA 1500 PICKUP TRUCK, ES HAS NO RECORD OF PREVIOUS LTR. *TS THE STEEL BRAKE LINE TUBE TO THE FRONT BRAKES RUPTURED. *JB
NHTSA ODI #10171195
Mileage unknown · Oct 4, 2006
Service Brakes, Hydraulic
CONSUMER 1999 SEIRRA 1500 BRAKE TUBE RUPTURED. *TS *JB
NHTSA ODI #10171180
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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