IllustrationWHEN DRIVING ON CITY STREETS IN PHOENIX I WILL PRESS ON THE BRAKE PEDAL AND THE PEDAL WILL DROP. THIS HAPPENS MOSTLY WHEN THERE ARE BUMPS OR ROUGH PAVEMENT. I HAVE TO QUICKLY PUMP THE BRAKE PEDAL TO GET BRAKES BAKE. THIS HAS BEEN GOING ON SINCE I BOUGHT THE TRUCK IN 2003. *TR
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
Service Brakes, Hydraulic complaints
147 reportsTL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH, THE ABS ENGAGED, THE WHEELS LOCKED, AND THE VEHICLE WOULD NOT STOP. EVER SINCE THAT TIME, THE ABS HAS CONTINUED TO ENGAGE. THE DEALER STATED THAT THE RECALL REPAIR HAD PREVIOUSLY BEEN PERFORMED ON THE VEHICLE IN MAY OF 2004. THE CONTACT BELIEVES THAT S…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH, THE ABS ENGAGED, THE WHEELS LOCKED, AND THE VEHICLE WOULD NOT STOP. EVER SINCE THAT TIME, THE ABS HAS CONTINUED TO ENGAGE. THE DEALER STATED THAT THE RECALL REPAIR HAD PREVIOUSLY BEEN PERFORMED ON THE VEHICLE IN MAY OF 2004. THE CONTACT BELIEVES THAT SOMETHING WAS NOT DONE CORRECTLY DURING THE RECALL REPAIR FOR THE ABS TO FAIL AGAIN. THE CURRENT MILEAGE WAS 70,000 AND FAILURE MILEAGE WAS 35,000. UPDATED 10/16/08 *BF THE DEALER DETERMINED THE ABS FRONT SPEED SENSORS, BOTH LEFT AND RIGHT NEEDED TOB E REPLACED. A RECALL WAS ISSUED LATER AND THE CONSUMER WAS REIMBURSED, HOWEVER IN JULY 2008, THE ABS BEGAN TO ENGAGE AGAIN AT LOW SPEEDS. AGAIN, THE RIGHT FRONT SPEEDSENSOR WAS BAD. UPDATED 10/20/08. *JB
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING BETWEEN 5-10 MPH WITH THE BRAKE PEDAL DEPRESSED, THE VEHICLE DID NOT STOP. THE SPEED SENSORS HAVE BEEN CLEANED TWO OR THREE TIMES. ON JUNE 4, 2008, THE BRAKE SENSORS WERE REPLACED AT THE COST OF MORE THAN $500. NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAK…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING BETWEEN 5-10 MPH WITH THE BRAKE PEDAL DEPRESSED, THE VEHICLE DID NOT STOP. THE SPEED SENSORS HAVE BEEN CLEANED TWO OR THREE TIMES. ON JUNE 4, 2008, THE BRAKE SENSORS WERE REPLACED AT THE COST OF MORE THAN $500. NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK) WAS REFERENCED. THE CURRENT MILEAGE WAS 67,000 AND FAILURE MILEAGE WAS 65,362. UPDATED 07/29/08.*LJ UPDATED 08/05/08
ANTILOCK BRAKES WERE TARGET OF RECALL AND THE REQUIRED SERVICE WAS PERFORMED IN 2005. VEHICLE IS CURRENTLY EXHIBITING THE SAME CONDITIONS THE RECALL WAS INTENDED TO FIX, ANTILOCK BRAKES ACTIVATING AT SLOW SPEEDS WHEN NOT NECESSARY. THE NOISE PRODUCED WHEN THE ANTILOCK BRAKES ARE ACTIVATES WAS PRODUCED AT HIGHWAY SPEEDS YESTERD…
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ANTILOCK BRAKES WERE TARGET OF RECALL AND THE REQUIRED SERVICE WAS PERFORMED IN 2005. VEHICLE IS CURRENTLY EXHIBITING THE SAME CONDITIONS THE RECALL WAS INTENDED TO FIX, ANTILOCK BRAKES ACTIVATING AT SLOW SPEEDS WHEN NOT NECESSARY. THE NOISE PRODUCED WHEN THE ANTILOCK BRAKES ARE ACTIVATES WAS PRODUCED AT HIGHWAY SPEEDS YESTERDAY WHEN THE BRAKE PEDAL WAS NOT TOUCHED. THE VEHICLE DID NOT REDUCE SPEED. I AM CONCERNED ABOUT A TOTAL BRAKE FAILURE AND HAVE CONTACTED CHEVROLET. *TR
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 55 MPH, THE ABS LIGHT ILLUMINATED AND THE CONTACT SMELLED SOMETHING BURNING. HE THEN NOTICED SMOKE AND FLAMES BILLOWING FROM UNDER THE FRAME OF THE DRIVER'S SEAT. THE VEHICLE HAS NOT BEEN INSPECTED BY THE DEALER OR A MECHANIC. THE CURRENT AND FAILURE MILEAGE…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 55 MPH, THE ABS LIGHT ILLUMINATED AND THE CONTACT SMELLED SOMETHING BURNING. HE THEN NOTICED SMOKE AND FLAMES BILLOWING FROM UNDER THE FRAME OF THE DRIVER'S SEAT. THE VEHICLE HAS NOT BEEN INSPECTED BY THE DEALER OR A MECHANIC. THE CURRENT AND FAILURE MILEAGES WERE 60,000. UPDATED 05/08/08. *LJ THE ANIT-LOCK BRAKE MOTOR AND WIRES FROM THE MOTOR CAUGHT ON FIRE, BUT NEVER BLEW A FUSE. UPDATED 05/09/08
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE APPROACHING AN INTERSECTION WITH THE BRAKE PEDAL DEPRESSED, THE ABS ACTIVATED PREMATURELY. AS A RESULT, THE VEHICLE TOOK APPROXIMATELY TEN EXTRA FEET TO STOP. THE FAILURE HAS OCCURRED APPROXIMATELY SIX TIMES. THE VEHICLE HAS NOT BEEN DIAGNOSED. THE SPEED WAS UNKNOWN…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE APPROACHING AN INTERSECTION WITH THE BRAKE PEDAL DEPRESSED, THE ABS ACTIVATED PREMATURELY. AS A RESULT, THE VEHICLE TOOK APPROXIMATELY TEN EXTRA FEET TO STOP. THE FAILURE HAS OCCURRED APPROXIMATELY SIX TIMES. THE VEHICLE HAS NOT BEEN DIAGNOSED. THE SPEED WAS UNKNOWN. THE CURRENT AND FAILURE MILEAGES WERE 80,000.
ANTI-LOCK BRAKE MODULE IS RUNNING CONSTANTLY. THE WHEEL SPEED SENSOR RECALL WAS PERFORMED ON MY TRUCK A COUPLE OF YEARS AGO. I HAD TO PULL THE FUSE ON THE ABS SYSTEM TO GET THE MODULE TO STOP RUNNING. IT WAS RUNNING EVEN WITH THE ENGINE OFF AND KEY REMOVED!! NOW THE ABS LIGHT AND BRAKE SYSTEM LIGHT ARE ON CONSTANTLY. I SHOULD NO…
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ANTI-LOCK BRAKE MODULE IS RUNNING CONSTANTLY. THE WHEEL SPEED SENSOR RECALL WAS PERFORMED ON MY TRUCK A COUPLE OF YEARS AGO. I HAD TO PULL THE FUSE ON THE ABS SYSTEM TO GET THE MODULE TO STOP RUNNING. IT WAS RUNNING EVEN WITH THE ENGINE OFF AND KEY REMOVED!! NOW THE ABS LIGHT AND BRAKE SYSTEM LIGHT ARE ON CONSTANTLY. I SHOULD NOT HAVE TO PAY $1,000.00+ TO GET THIS FIXED WHEN SO MANY OTHER OWNERS ARE HAVING THE SAME PROBLEM. I CAN DRIVE THE TRUCK, THE BRAKES ARE WORKING BUT I AM NOT SURE THAT IT IS SAFE. THANK YOU FOR ADDING THIS DEFECT TO YOUR DATABASE. *TR
I BOUGHT A NEW CHEVY SILVERADO 1500 4X4 IN JULY OF 2001. I DON'T DRIVE IT THAT MUCH, AND WHEN I DO, IT IS MOSTLY FREEWAY MILES. ABOUT 5 TIMES/YEAR I'LL TOW A LIGHT BOAT TO PUGET SOUND, AND AFTER COMING BACK ALWAYS HOSE OFF THE BOAT, TRAILER, AND SALT WATER EXPOSED AREA OF THE TRUCK. IN 2004 AT 6770 MILES, THE REAR ROTORS, CALIPE…
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I BOUGHT A NEW CHEVY SILVERADO 1500 4X4 IN JULY OF 2001. I DON'T DRIVE IT THAT MUCH, AND WHEN I DO, IT IS MOSTLY FREEWAY MILES. ABOUT 5 TIMES/YEAR I'LL TOW A LIGHT BOAT TO PUGET SOUND, AND AFTER COMING BACK ALWAYS HOSE OFF THE BOAT, TRAILER, AND SALT WATER EXPOSED AREA OF THE TRUCK. IN 2004 AT 6770 MILES, THE REAR ROTORS, CALIPERS AND PADS WERE RUINED (UNDER WARRANTY--CAUSE DETERMINED TO BE DEBRIS CAUGHT UP IN MECHANISM). GOOD CHEVROLET FIXED PERFECTLY. NOW IN MARCH 2008 AT ONLY 18,700 MILES (12K MILES ON NEW BRAKES), THE REAR BRAKES NEED TO BE COMPLETELY REBUILT. GOOD IS SAYING THE CAUSE IS SALT WATER. AND OF COURSE THE WARRANTY IS LONG OVER----LOOKING AT $2000 TO FIX. I SAY HOGWASH! BRAKES SHOULD NOT FALL APART AFTER 12,000 GENTLE MILES. I DON'T FOUR WHEEL DRIVE EXCEPT ON RARE OCCASION TO GET OVER THE MOUNTAIN PASS---AND THAT'S ON SNOW. I AM EASY WITH THIS TRUCK. I DON'T SPEED AROUND AND SLAM ON THE BRAKES EVER. NEVER. I AM PRETTY SURE THIS IS A COMMON PROBLEM. JUST GOOGLED UP A SIMILAR CASE OF A 2002 SILVERADO IN COLORADO WITH 28,000 MILES AND COMPLETE BRAKE FAILURE DUE TO RUST. I'LL REPAIR BRAKES ELSEWHERE. I'LL WAIT AND SEE IF SOME CLASS ACTION LAWSUIT COMES OF THIS. IT'S TOO BAD. THE TRUCK IS PRETTY NICE, BUT HAVING BRAKES FALL APART FOR NO GOOD REASON IS BS AND TOO EXPENSIVE, NOT TO MENTION AS WELL AS A BIG SAFETY CONCERN. *TR
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE APPLYING THE BRAKES AT APPROXIMATELY 10 MPH, THE ANTILOCK BRAKE SYSTEM ACTIVATED. THE CONTACT STATED THAT THE FAILURE USUALLY OCCURRED ON DRY ROAD SURFACES. THE DEALER HAD NOT BEEN NOTIFIED. THE FAILURE MILEAGE WAS 10,000 AND CURRENT MILEAGE WAS 70,000.
I HAVE A 2001 SILVERADO. MY ANTI-LOCK BRAKES ARE COMING ON AT SLOW SPEEDS, MAKING IT SOMETIMES VERY HARD TO STOP. YESTERDAY WHEN PULLING INTO MY WORK PARKING SPACE I COULD NOT STOP AND JUMPED THE CURB. IF THERE WERE SOMEONE WALKING ON THE SIDEWALK THEY WOULD HAVE BEEN HIT. *TR
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.