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2001 Chevrolet Monte Carlo

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

About this comparison →

When problems were reported

Mileage at the reported incident

164 reports with mileage · 112 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.

  • Electrical System. Review the 77 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 48 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine And Engine Cooling. Review the 48 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

13 crash reports31 fire reports14 injury reports

What owners actually said

276 reports
65,000 miles · Feb 4, 2004
Structure

AFTER HITTING A BUMP IN THE ROAD CONSUMER HEARED A LOUD RATTLING NOISE COMING FROM THE CRADLE. *AK

NHTSA ODI #10057498

70,000 miles · Jan 23, 2004
Power Train

WHILE AT A STOP, THE DRIVER PROCEEDED TO GO AND THE VEHICLE WOULD NOT MOVE. THE VEHICLE WAS TOWED TO THE DEALER. THE VEHICLE HAD TWO TRANSMISSIONS REPLACED WITHIN 70,000 MILES. THE DEALER SAID THE FLYWHEEL AND FLEX PLATE BECAME DISENGAGED FROM THE ENGINE. *AK *SC *JB

NHTSA ODI #10051941

50,000 miles · Jan 15, 2004
Engine And Engine CoolingTires

WINDSHELD WIPERS PARK STRAIGHT UP VERTICAL. HEATER RESISTOR FAILED. CHECK ENGINE LIGHT ALWAYS ON. STEERING WHEEL RATTLES WHEN CORNERING SLOWLY. LIGHT ALWAYS ON SAYING ANTIFREEZE LOW DESPITE IT NOT BEING LOW. TOO MUCH BASS IN RADIO ROUGH SHIFTS. BRAKE PADS DONE AT 70,000KM SEEMS TO BE FALLING APART AS SOON AS WARRANTY WAS UP.

NHTSA ODI #10071288

Mileage unknown · Jan 15, 2004
Power Train

THE ONLY REASON I AM SUBMITTING THIS IS THAT I KNOW OF 3 OTHER MONTE CARLOS IN THIS AREA WITH THE SAME PROBLEM. GM DOES NOT WANT TO RE-ISSUE A FULL WARRENTY ON THE REPAIRED PART. WE STOOD OUR GROUND WITH THEM AND GOT A 50,000 MILE WARRENTY IN WRITING FROM THE DEALERSHIP, BUT ONLY AFTER TELLING THEM I WOULD CONTACT THE ATTORNEY…

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THE ONLY REASON I AM SUBMITTING THIS IS THAT I KNOW OF 3 OTHER MONTE CARLOS IN THIS AREA WITH THE SAME PROBLEM. GM DOES NOT WANT TO RE-ISSUE A FULL WARRENTY ON THE REPAIRED PART. WE STOOD OUR GROUND WITH THEM AND GOT A 50,000 MILE WARRENTY IN WRITING FROM THE DEALERSHIP, BUT ONLY AFTER TELLING THEM I WOULD CONTACT THE ATTORNEY GENERALS OFFICE...WHICH I DID ANYWAY. SEEMS THIS IS A PROBLEM THEY ARE AWARE OF AND ARE TRYING TO KEEP IT QUIET. PEOPLE SHOULD KNOW THAT THEY NEED TO ARGUE WITH THE DEALER FOR A GOOD WARRENTY.

NHTSA ODI #10069541

Mileage unknown · Jan 15, 2004
Engine And Engine Cooling

MY 2001 MONTE CARLO SS DEVELOPED A LEAK BETWEEN THE UPPER PLASTIC INTAKE MANIFOLD AND LOWER ALUMINIUM INTAKE MANIFOLD. I STOPPED AT A DEALER AND ASKED THEM ABOUT IT AND THEY SAID THEY KNEW OF NO PROBLEM BUT WHEN I ASKED THEM HOW MUCH TO REPAIR THEY REPLIED ABOUT $800 WITHOUT LOOKING AT THE CAR. I CONTACTED GM CUSTOMER SERVICE AN…

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MY 2001 MONTE CARLO SS DEVELOPED A LEAK BETWEEN THE UPPER PLASTIC INTAKE MANIFOLD AND LOWER ALUMINIUM INTAKE MANIFOLD. I STOPPED AT A DEALER AND ASKED THEM ABOUT IT AND THEY SAID THEY KNEW OF NO PROBLEM BUT WHEN I ASKED THEM HOW MUCH TO REPAIR THEY REPLIED ABOUT $800 WITHOUT LOOKING AT THE CAR. I CONTACTED GM CUSTOMER SERVICE AND THEY TOLD ME TO TAKE THE CAR TO A DEALER FOR AN ESTIMATE, WHICH I DID. THEY THEN TALKED WITH THE DEALER AND CAME TO THE CONCLUSION THAT THERE WAS NOTHING THEY COULD DO FOR ME. IN THE MEANTIME I DID SOME RESEARCH AND FOUND THAT THIS IS A COMMON PROBLEM WITH A TECHNICAL SERVICE BULLETIN OUT ON IT. GM CUSTOMER SERVICE AND THE DEALER SAID THAT SINCE THIS IS NOT A SAFETY ISSUE NOTHING COULD BE DONE BECAUSE THE CAR IS OUT OF WARRANTY AND THAT I SHOULD HAVE PURCHASED THE EXTENDED WARRANTY. SO I WAS STUCK PAYING A GARAGE $880 TO REPLACE BOTH MANIFOLDS AS DIRECTED IN THE TSB AND THE WORRY THAT MY YEAR AND A HALF OLD CAR MY LAUNCH ITS MOTOR AT ANYTIME DUE TO THE CONTAMINATION OF THE OIL WITH ANTIFREEZE FROM THE LEAK.

NHTSA ODI #10068834

Mileage unknown · Dec 18, 2003
Steering

CLUNKING NOISE WHEN MAKING A TURN CAN ALSO BE FELT THROUGH THE STEERING COLUMN. THE SAME THING CAN BE FELT AT HIGHWAY SPEEDS.*AK

NHTSA ODI #10050715

51,966 miles · Dec 10, 2003
Power Train

AUTOMATIC TRANSMISSION FAILURE. *LA

NHTSA ODI #10049553

18,000 miles · Nov 22, 2003
Steering

WHILE DRIVING AT HIGHWAY SPEEDS, VEHICLE TENDS TO DRIFT TO EITHER SIDE CAUSING VERY POOR HANDLING. FLAWS IN THE ROAD CAUSES THE VEHICLE TO WANDER ALL OVER THE PLACE. TRYING TO HAVE THE PROBLEM FIXED FOR 2 YEARS NOW HAS COMPLETELY EXHAUSTED ME, YET THE PROBLEM STILL EXIST. I HOPE AND WISH FOR SOMETHING TO HAPPEN RESULTING IN R…

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WHILE DRIVING AT HIGHWAY SPEEDS, VEHICLE TENDS TO DRIFT TO EITHER SIDE CAUSING VERY POOR HANDLING. FLAWS IN THE ROAD CAUSES THE VEHICLE TO WANDER ALL OVER THE PLACE. TRYING TO HAVE THE PROBLEM FIXED FOR 2 YEARS NOW HAS COMPLETELY EXHAUSTED ME, YET THE PROBLEM STILL EXIST. I HOPE AND WISH FOR SOMETHING TO HAPPEN RESULTING IN REPAIRS BEING MADE TO MY CAR, BEING THAT THIS IS MY FIRST NEW CAR AND I SAVED FOR YEARS TO PURCHASE IT. *LA

NHTSA ODI #10047381

30,000 miles · Nov 21, 2003
Engine And Engine Cooling

FOR THE PAST YEAR I HAVE BEEN HAVING PROBLEMS WITH ENGINE COOLANT LOSS FROM MY CAR, WHEN I FIRST NOTICED IT I BROUGHT IT TO THE DEALER'S ATTENTION AND WAS INFORMED THAT WHAT I WAS SEEING WAS A "GASKET SEALER" AND I WAS NORMAL WITH A NEW CAR; HOWEVER, 4 MONTHS LATER I AM LOSING COOLANT FROM THE INTAKE MANIFOLD LOOSING UP, AFTER T…

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FOR THE PAST YEAR I HAVE BEEN HAVING PROBLEMS WITH ENGINE COOLANT LOSS FROM MY CAR, WHEN I FIRST NOTICED IT I BROUGHT IT TO THE DEALER'S ATTENTION AND WAS INFORMED THAT WHAT I WAS SEEING WAS A "GASKET SEALER" AND I WAS NORMAL WITH A NEW CAR; HOWEVER, 4 MONTHS LATER I AM LOSING COOLANT FROM THE INTAKE MANIFOLD LOOSING UP, AFTER THE FIRST REPAIR, WHERE THE BOLTS WHERE SIMPLY TIGHTENED UP IT WAS OK , NOW IT IS LEAKING ALL AROUND THE INTAKE GASKET ON TO THE ELECTRICAL SYSTEM AND TRANSMISSION. I TOOK THE CAR TO THE DEALER, AND WAS TOLD THERE WAS A RECALL ON THE MONTE CARLOS FOR THIS PROBLEM BUT MY ENGINE IS NOT AFFECTED I HAVE A 3.4 LITER AND THE RECALL WAS ON 3.1 AND 3.8 ENGINES. I HAVE BEEN GOING BACK AND FORTH WITH THE DEALER AND CHEVY USA ON THIS FOR SEVERAL MONTHS NOW WITH NO RESOLUTION, MY CAR WAS UNDER WARRANTY WHEN I FIRST NOTICED THIS AND WAS TOLD IT WAS "NOTHING TO WORRY ABOUT" NOW IT IS NOT UNDER WARRANTY AND THE PROBLEM IS WORSE I AM HOPING IN WRITING YOU THIS IT CAN BE INVESTIGATED AS TO WHY I HAVE THE SAME PROBLEM WITH MY CAR AS THE OTHER ENGINE SIZES BUT MY MOTOR IS NOT PART OF THE REPAIR RECALL, IT IS OBVIOUS TO ME THAT THIS IS A DESIGN DEFECT ON MY MOTOR. THE INTAKE SHOULD NOT JUST COME LOOSE FROM THE ENGINE AFTER 20,000 AND 40,000 MILES SHOULD IT? THE VEHICLE IS A 2001 CHEVY MONTE CARLO LS WITH THE 3.4 LITER V6 AUTO TRANSMISSION. *LA

NHTSA ODI #10047343

60,000 miles · Nov 3, 2003
Engine And Engine Cooling

WHILE THE VEHICLE WAS AT THE DEALER FOR AN OIL CHANGE DEALER INDICATED THAT HEAD GASKET WAS LEAKING COOLANT FROM THE MANIFOLD. *AK

NHTSA ODI #10046185

Official recalls

5

15V701000 · Engine And Engine Cooling:engine; Engine And Engine Cooling:exhaust System:manifold/header/muffler/tail Pipe

Oct 26, 2015

General Motors LLC (GM) is recalling certain model year 1998-1999 Chevrolet Lumina and Oldsmobile Intrigue, 1997-2004 Buick Regal and Pontiac Grand Prix, 2000-2004 Chevrolet Impala, and 1998-2004 Chevrolet Monte Carlo vehicles. The affected vehicles were previously repaired under recalls 08V-118, 09V-116, and 15V-201 to address the possibility that engine oil may drip onto the hot exhaust manifold.

Consequence & remedy

Consequence: Engine oil that drips onto the hot surface of the exhaust manifold may result in a fire.

Remedy: The remedy applied under recalls 08V-118, 09V-116, and 15V-201 did not adequately remove the safety risk. Under the improved remedy, dealers will replace the engine’s front valve cover and gasket. Vehicles that are covered by recalls 08V-118, 09V-116, or 15V-201 that have not yet received the original remedy will instead receive the improved remedy under the original recall number. The recall began on February 19, 2016. Owners may contact Chevrolet customer service at 1-800-222-1020, Buick customer service at 1-800-521-7300, Oldsmobile customer service at 1-800-442-6537 and Pontiac customer service at 1-800-458-8006. GM's number for this recall is 15757. Note: Until the improved remedy has been applied, owners are advised to park their vehicle outside since the fire risk exists even when the vehicle is unattended.

Additional source detail variants (2)

Engine And Engine Cooling:exhaust System:manifold/header/muffler/tail Pipe

General Motors LLC (GM) is recalling certain model year 1998-1999 Chevrolet Lumina and Oldsmobile Intrigue, 1997-2004 Buick Regal and Pontiac Grand Prix, 2000-2004 Chevrolet Impala, and 1998-2004 Chevrolet Monte Carlo vehicles. The affected vehicles were previously repaired under recalls 08V-118, 09V-116, and 15V-201 to address the possibility that engine oil may drip onto the hot exhaust manifold.

Consequence: Engine oil that drips onto the hot surface of the exhaust manifold may result in a fire.

Remedy: The remedy applied under recalls 08V-118, 09V-116, and 15V-201 did not adequately remove the safety risk. Under the improved remedy, dealers will replace the engine’s front valve cover and gasket. Vehicles that are covered by recalls 08V-118, 09V-116, or 15V-201 that have not yet received the original remedy will instead receive the improved remedy under the original recall number. The recall began on February 19, 2016. Owners may contact Chevrolet customer service at 1-800-222-1020, Buick customer service at 1-800-521-7300, Oldsmobile customer service at 1-800-442-6537 and Pontiac customer service at 1-800-458-8006. GM's number for this recall is 15757. Note: Until the improved remedy has been applied, owners are advised to park their vehicle outside since the fire risk exists even when the vehicle is unattended.

Engine And Engine Cooling:engine

General Motors LLC (GM) is recalling certain model year 1998-1999 Chevrolet Lumina and Oldsmobile Intrigue, 1997-2004 Buick Regal and Pontiac Grand Prix, 2000-2004 Chevrolet Impala, and 1998-2004 Chevrolet Monte Carlo vehicles. The affected vehicles were previously repaired under recalls 08V-118, 09V-116, and 15V-201 to address the possibility that engine oil may drip onto the hot exhaust manifold.

Consequence: Engine oil that drips onto the hot surface of the exhaust manifold may result in a fire.

Remedy: The remedy applied under recalls 08V-118, 09V-116, and 15V-201 did not adequately remove the safety risk. Under the improved remedy, dealers will replace the engine’s front valve cover and gasket. Vehicles that are covered by recalls 08V-118, 09V-116, or 15V-201 that have not yet received the original remedy will instead receive the improved remedy under the original recall number. The recall began on February 19, 2016. Owners may contact Chevrolet customer service at 1-800-222-1020, Buick customer service at 1-800-521-7300, Oldsmobile customer service at 1-800-442-6537 and Pontiac customer service at 1-800-458-8006. GM's number for this recall is 15757. Note: Until the improved remedy has been applied, owners are advised to park their vehicle outside since the fire risk exists even when the vehicle is unattended.

14V400000 · Electrical System:ignition

Jul 3, 2014

This defect can affect the safe operation of the airbag system. Until this recall is performed, customers should remove all items from their key rings, leaving only the ignition key. The key fob (if applicable), should also be removed from the key ring. General Motors LLC (GM) notified the agency on July 3, 2014, that they are recalling 5,877,718 model year 2000-2005 Chevrolet Impala and Monte Carlo, 1997-2003 Chevrolet Malibu, 2004-2005 Malibu Classic, 1999-2004 Oldsmobile Alero, 1998-2002 Oldsmobile Intrigue, 1999-2005 Pontiac Grand Am and 2004-2008 Pontiac Grand Prix vehicles. In these models, the weight on the key ring and/or road conditions or some other jarring event may cause the ignition switch to move out of the run position, turning off the engine.

Consequence & remedy

Consequence: If the key is not in the run position, the air bags may not deploy if the vehicle is involved in a crash, increasing the risk of injury.

Remedy: GM will notify owners, and dealers will install two key rings and an insert in the key slot or a cover over the key head on all ignition keys, free of charge. The recall began on September 9, 2014. GM's number for this recall is 14350.

09V116000 · Engine And Engine Cooling

Apr 8, 2009

GENERAL MOTORS IS RECALLING 1,497,516 MY 1997-2003 BUICK REGAL, MY 1998-2003 CHEVROLET LUMINA, MONTE CARLO AND IMPALA, MY 1998-1999 OLDSMOBILE INTRIGUE, MY 1997-2003 PONTIAC GRAND PRIX VEHICLES EQUIPPED WITH A 3.8L V6 NATURALLY ASPIRATED ENGINE. SOME OF THESE VEHICLES HAVE A CONDITION IN WHICH DROPS OF ENGINE OIL MAY BE DEPOSITED ON THE EXHAUST MANIFOLD THROUGH HARD BRAKING.

Consequence & remedy

Consequence: IF THE MANIFOLD IS HOT ENOUGH AND THE OIL RUNS BELOW THE HEAT SHIELD, IT MAY IGNITE INTO A SMALL FLAME AND MAY SPREAD TO THE PLASTIC SPARK PLUG WIRE CHANNEL AND BEYOND INCREASING THE RISK OF AN ENGINE COMPARTMENT FIRE.

Remedy: DEALERS WILL REPLACE THE ENGINE’S FRONT VALVE COVER AND FRONT-VALVE-COVER GASKET WITH NEW PARTS OF AN IMPROVED DESIGN AND REMOVE THE ENGINE’S PLASTIC COVER AND PLASTIC OIL-FILL-TUBE EXTENSION, FREE OF CHARGE. THE RECALL IS EXPECTED TO BEGIN DURING MAY 2016. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, OLDSMOBILE AT 1-800-630-6537, AND PONTIAC AT 1-800-620-7668 OR HTTP://WWW.PONTIAC.COM OR HTTP:WWW.GMOWNERCENTER.COM.

00V244000 · Air Bags

Aug 29, 2000

VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE AIR BAG SENSING AND DIAGNOSTIC MODULES (SDM) COULD EXPERIENCE A MEMORY ERROR RESULTING IN THE AIR BAGS NOT DEPLOYING IN A CRASH SITUATION.

Consequence & remedy

Consequence: IN A CRASH, A FRONT SEAT OCCUPANT MAY RECEIVE MORE SERIOUS INJURIES.

Remedy: DEALERS WILL REPLACE THE SENSING AND DIAGNOSTIC MODULE.

00V228003 · Seat Belts

Aug 7, 2000

VEHICLE DESCRIPTION: PASSENGER VEHICLES, LIGHT DUTY TRUCKS, SPORT UTILITY VEHICLES, AND MINI VANS EQUIPPED WITH TRW SEAT BELT BUCKLE ASSEMBLIES. THE BUCKLE BASE OF THESE SEAT BELT ASSEMBLIES WERE NOT PROPERLY HEAT TREATED AND THEREFORE DO NOT PASS THE LOAD BEARING REQUIREMENT OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 209, "SEAT BELT ASSEMBLIES."

Consequence & remedy

Consequence: IN THE EVENT OF A VEHICLE CRASH, THE OCCUPANT MAY NOT BE PROPERLY RESTRAINED.

Remedy: DEALERS WILL INSPECT THE VEHICLE'S SAFETY BELT BUCKLE ASSEMBLY DATE CODES AND, IF NECESSARY, WILL REPLACE ANY SAFETY BELT BUCKLE ASSEMBLY.

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

1

EA02030 · Engine Compartment Fires

Opened Oct 22, 2002 · Closed Mar 9, 2004

Status: closed (inferred from source dates) · Fuel System, Gasoline; Fuel System, Gasoline:delivery; Fuel System, Gasoline:delivery:hoses, Lines/piping, And Fittings

EA02-030 IS CLOSED WITH GMEA02-030 IS CLOSED WITH GM?S ACTIONS IN 03V-473 AND 04V-090 RECALLING APPROXIMATELY 529,000 MY 1998-99 C- AND H-BODY VEHICLES EQUIPPED WITH DEFECTIVE FUEL PRESSURE REGULATORS.THESE VEHICLES WERE EQUIPPED WITH PLASTIC INTAKE MANIFOLDS THAT ARE UNABLE TO CONTAIN PRESSURES THAT OCCUR IN SOME BACKFIRE EVENTS AND DEFECTIVE FUEL PRESSURE REGULATORS WITH LEAKING DIAPHRAGMS THAT CAN PROVIDE A SOURCE OF FUEL TO PRODUCE A COMBUSTIBLE AIR-FUEL MIXTURE IN THE MANIFOLD.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY ODI THAT NO SAFETY DEFECT EXISTS IN THE VEHICLES THAT ARE NOT INCLUDED IN GM?S RECALLS.ODI WILL CONTINUE TO MONITOR THE INCIDENCE OF MANIFOLD RUPTURES AND RELATED FIRES IN OTHER MY 1995-2002 GM PASSENGER CARS EQUIPPED WITH THE SUBJECT INTAKE MANIFOLD.FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.

Additional source detail variants (3)

Fuel System, Gasoline:delivery

EA02-030 IS CLOSED WITH GMEA02-030 IS CLOSED WITH GM?S ACTIONS IN 03V-473 AND 04V-090 RECALLING APPROXIMATELY 529,000 MY 1998-99 C- AND H-BODY VEHICLES EQUIPPED WITH DEFECTIVE FUEL PRESSURE REGULATORS.THESE VEHICLES WERE EQUIPPED WITH PLASTIC INTAKE MANIFOLDS THAT ARE UNABLE TO CONTAIN PRESSURES THAT OCCUR IN SOME BACKFIRE EVENTS AND DEFECTIVE FUEL PRESSURE REGULATORS WITH LEAKING DIAPHRAGMS THAT CAN PROVIDE A SOURCE OF FUEL TO PRODUCE A COMBUSTIBLE AIR-FUEL MIXTURE IN THE MANIFOLD.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY ODI THAT NO SAFETY DEFECT EXISTS IN THE VEHICLES THAT ARE NOT INCLUDED IN GM?S RECALLS.ODI WILL CONTINUE TO MONITOR THE INCIDENCE OF MANIFOLD RUPTURES AND RELATED FIRES IN OTHER MY 1995-2002 GM PASSENGER CARS EQUIPPED WITH THE SUBJECT INTAKE MANIFOLD.FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.

Fuel System, Gasoline:delivery:hoses, Lines/piping, And Fittings

EA02-030 IS CLOSED WITH GMEA02-030 IS CLOSED WITH GM?S ACTIONS IN 03V-473 AND 04V-090 RECALLING APPROXIMATELY 529,000 MY 1998-99 C- AND H-BODY VEHICLES EQUIPPED WITH DEFECTIVE FUEL PRESSURE REGULATORS.THESE VEHICLES WERE EQUIPPED WITH PLASTIC INTAKE MANIFOLDS THAT ARE UNABLE TO CONTAIN PRESSURES THAT OCCUR IN SOME BACKFIRE EVENTS AND DEFECTIVE FUEL PRESSURE REGULATORS WITH LEAKING DIAPHRAGMS THAT CAN PROVIDE A SOURCE OF FUEL TO PRODUCE A COMBUSTIBLE AIR-FUEL MIXTURE IN THE MANIFOLD.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY ODI THAT NO SAFETY DEFECT EXISTS IN THE VEHICLES THAT ARE NOT INCLUDED IN GM?S RECALLS.ODI WILL CONTINUE TO MONITOR THE INCIDENCE OF MANIFOLD RUPTURES AND RELATED FIRES IN OTHER MY 1995-2002 GM PASSENGER CARS EQUIPPED WITH THE SUBJECT INTAKE MANIFOLD.FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.

Fuel System, Gasoline

EA02-030 IS CLOSED WITH GMEA02-030 IS CLOSED WITH GM?S ACTIONS IN 03V-473 AND 04V-090 RECALLING APPROXIMATELY 529,000 MY 1998-99 C- AND H-BODY VEHICLES EQUIPPED WITH DEFECTIVE FUEL PRESSURE REGULATORS.THESE VEHICLES WERE EQUIPPED WITH PLASTIC INTAKE MANIFOLDS THAT ARE UNABLE TO CONTAIN PRESSURES THAT OCCUR IN SOME BACKFIRE EVENTS AND DEFECTIVE FUEL PRESSURE REGULATORS WITH LEAKING DIAPHRAGMS THAT CAN PROVIDE A SOURCE OF FUEL TO PRODUCE A COMBUSTIBLE AIR-FUEL MIXTURE IN THE MANIFOLD.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY ODI THAT NO SAFETY DEFECT EXISTS IN THE VEHICLES THAT ARE NOT INCLUDED IN GM?S RECALLS.ODI WILL CONTINUE TO MONITOR THE INCIDENCE OF MANIFOLD RUPTURES AND RELATED FIRES IN OTHER MY 1995-2002 GM PASSENGER CARS EQUIPPED WITH THE SUBJECT INTAKE MANIFOLD.FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.