← New search

2004 Chevrolet Suburban

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2004 Chevrolet Suburban do not stand out strongly from the model-year median of 118.

About this comparison →

When problems were reported

Mileage at the reported incident

167 reports with mileage · 37 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 72 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Service Brakes. Review the 32 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Service Brakes, Hydraulic. Review the 17 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

12 crash reports6 fire reports8 injury reports

Service Brakes, Hydraulic complaints

17 reports
Clear category filter
109,115 miles · Oct 26, 2013
Service BrakesService Brakes, Hydraulic

I LIVE NEAR FREDERICK, MARYLAND AND TODAY I DROVE MY 2004 SUBURBAN DOWN TO THE CUL DE SAC AT THE END OF OUR STREET GOING AROUND 20MPH, BUT WHEN I PRESSED THE BRAKES, I FELT THEM GO ALMOST TO THE FLOOR, SO I PUMPED/PRESSED THEM AGAIN TWICE AND EACH TIME THEY THEN WENT FULLY TO THE FLOOR BUT THE TRUCK WAS NOT STOPPING. I MANAGED T…

Read full complaint

I LIVE NEAR FREDERICK, MARYLAND AND TODAY I DROVE MY 2004 SUBURBAN DOWN TO THE CUL DE SAC AT THE END OF OUR STREET GOING AROUND 20MPH, BUT WHEN I PRESSED THE BRAKES, I FELT THEM GO ALMOST TO THE FLOOR, SO I PUMPED/PRESSED THEM AGAIN TWICE AND EACH TIME THEY THEN WENT FULLY TO THE FLOOR BUT THE TRUCK WAS NOT STOPPING. I MANAGED TO PUT THE VEHICLE IN NEUTRAL AND PRESS THE EMERGENCY BRAKE TO GET THE VEHICLE STOPPED WITH THE FRONT TIRES JUST 3 FEET FROM MY NEIGHBORS LAWN. I THEN GOT OUT AND LOOKED UNDER THE VEHICLE AND THERE WAS BRAKE FLUID EVERYWHERE ALONG WITH A TRAIL OF IT ABOUT 30-40 FEET UP THE STREET FROM WHERE I FIRST PRESSED THE BRAKES. I TOWED THE TRUCK BACK TO MY DRIVEWAY AND LOOKED UNDERNEATH AND CAN SEE THAT ALL OF THE STEEL BRAKE LINES ARE HEAVILY RUSTED ALONG THE FRAME BELOW THE DRIVERS DOOR AREA. I COULD SEE THAT ONE OF THE LINES CLEARLY RUPTURED AND SPRAYED BRAKE FLUID EVERYWHERE. I STARTED LOOKING ON THE INTERNET AND SEE THE SAME SYMPTOM/PROBLEMS ARE ALREADY LISTED AS UNDER INVESTIGATION FOR 1999-2003 CHEVY TRUCKS UNDER NHTSA ACTION NUMBER : PE10010. MINE IS A 2004 MODEL YEAR BUT IT MAY HAVE BEEN BUILT IN LATE 2003. IN ANY CASE, I WAS EXTREMELY LUCKY THAT IT HAPPENED IN MY NEIGHBORHOOD AT 20MPH AND NOT ON THE HIGHWAY OR WHILE TOWING. CLEARLY GM HAS A PROBLEM AND THESE TRUCKS THAT NEEDS TO BE RECALLED AS THIS PROBLEM COULD KILL PEOPLE VERY EASILY! *TR

NHTSA ODI #10549653

39,000 miles · Sep 17, 2012
Service Brakes, Hydraulic

TL* THE CONTACT OWNS A 2004 CHEVROLET SUBURBAN. WHILE PARKED, THE DRIVER DEPRESSED THE BRAKE PEDAL BUT THE BRAKES WOULD NOT RESPOND. THE PARKING BRAKE WAS APPLIED IN ORDER TO STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSTIC TESTING. THE TECHNICIAN ADVISED THE CONTACT THAT THE BRAKE LINES HAD CORRODED FROM THE…

Read full complaint

TL* THE CONTACT OWNS A 2004 CHEVROLET SUBURBAN. WHILE PARKED, THE DRIVER DEPRESSED THE BRAKE PEDAL BUT THE BRAKES WOULD NOT RESPOND. THE PARKING BRAKE WAS APPLIED IN ORDER TO STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSTIC TESTING. THE TECHNICIAN ADVISED THE CONTACT THAT THE BRAKE LINES HAD CORRODED FROM THE INSIDE AND WOULD HAVE TO BE REPLACED ALONG WITH THE BRAKE PADS AND ROTORS. THE VEHICLE WAS REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 39,000. ...UPDATED 10/17/12 *BF THE CONSUMER STATED THE VEHICLE DID NOT SHOW ANY WARNING LIGHTS. GM OFFERED A CREDIT TOWARDS PURCHASING A NEW CHEVROLET VEHICLE. THE CONSUMER DECLINED. UPDATED 10/17/2012 *JS THE CONSUMER ALSO STATED THE CALIPERS WERE SEVERELY RUSTED, ALONG WITH THE FRONT CALIPER HOSES AND FRONT ROTORS, WHICH CAUSED THE BRAKE PADS TO CRACK AND WEAR UNEVENLY. UPDATED EVOQ 10/24/12 UPDATED EVOQ 11/21/12

NHTSA ODI #10475607

149,000 miles · Apr 9, 2012
Electronic Stability Control (esc)Service Brakes, HydraulicVehicle Speed Control

WAS DRIVING AT A VERY LOW RATE OF SPEED; TRYING TO STOP WHEN WHAT FELT LIKE THE ANTILOCK BRAKES KICKED ON AND THE MESSAGE "TRACTION ACTIVE" APPEARED ON MY CONSOLE. THIS MADE IT VERY DIFFICULT TO CONTROL AND STOP THE VEHICLE. THEN WHEN TRYING TO ACCELERATE, VEHICLE WOULD LUG DOWN AND NOT WANT TO GO. THERE WAS ALSO A NOISE, LIK…

Read full complaint

WAS DRIVING AT A VERY LOW RATE OF SPEED; TRYING TO STOP WHEN WHAT FELT LIKE THE ANTILOCK BRAKES KICKED ON AND THE MESSAGE "TRACTION ACTIVE" APPEARED ON MY CONSOLE. THIS MADE IT VERY DIFFICULT TO CONTROL AND STOP THE VEHICLE. THEN WHEN TRYING TO ACCELERATE, VEHICLE WOULD LUG DOWN AND NOT WANT TO GO. THERE WAS ALSO A NOISE, LIKE A PUMP OR SOMETHING WHEN TRYING TO BRAKE OR ACCELERATE. TURNING OFF THE STABILITRACK SEEMS TO STOP THIS FROM HAPPENING, WHICH IN TURN MEANS I DO NOT HAVE ANTILOCK BRAKES. THIS IS A HUGE SAFETY ISSUE, ESPECIALLY IF TRYING TO MERGE, PASS THROUGH AN INTERSECTION OR WHILE DRIVING AT A HIGH RATE OF SPEED. *TR

NHTSA ODI #10454507

63,200 miles · Nov 15, 2011
Service Brakes, Hydraulic

WHILE APPROACHING A STOP SIGN, I TRIED TO BRAKE AND THE PEDAL WENT TO THE FLOOR. NO BRAKES!! I WAS ABLE TO COAST TO A STOP. UPON CHECKING, ALL BRAKE FLUID WAS GONE AND THE BRAKE LINES WERE ROTTED THROUGH. ALL BRAKE LINES HAD TO BE REPLACED ALONG WITH THE FRONT CALIPERS. CORROSION WAS THE PROBLEM WITH THE LINES AND CALIPERS.

NHTSA ODI #10436939

37,520 miles · Sep 13, 2010
Service Brakes, Hydraulic

TL* THE CONTACT OWNS A 2004 CHEVROLET SUBURBAN. THE CONTACT STATED THAT THE BRAKES WERE SPONGY AND CONTINUED TO FEEL WEAKENED. THE DEALER REPLACED THE SENSOR FOR THE FRONT ANTI-LOCK BRAKING SYSTEM FIVE TIMES TO NO AVAIL. THE CONTACT STATED THAT THE ANTI-LOCK BRAKING SYSTEMS WOULD INDEPENDENTLY ENGAGE AT LOW SPEED AND THE BRAKES …

Read full complaint

TL* THE CONTACT OWNS A 2004 CHEVROLET SUBURBAN. THE CONTACT STATED THAT THE BRAKES WERE SPONGY AND CONTINUED TO FEEL WEAKENED. THE DEALER REPLACED THE SENSOR FOR THE FRONT ANTI-LOCK BRAKING SYSTEM FIVE TIMES TO NO AVAIL. THE CONTACT STATED THAT THE ANTI-LOCK BRAKING SYSTEMS WOULD INDEPENDENTLY ENGAGE AT LOW SPEED AND THE BRAKES WOULD FEEL SHAKY. THE DEALER WAS UNABLE TO PROVIDE A CAUSE FOR THE FAILURE. THE FAILURE MILEAGE WAS 37,520 AND THE CURRENT MILEAGE WAS 80,000.

NHTSA ODI #10355154

23,400 miles · Aug 4, 2009
Service Brakes, HydraulicSteering

TL*THE CONTACT OWNS A 2004 CHEVROLET SUBURBAN. WHILE DRIVING APPROXIMATELY 35 MPH, THE STEERING WHEEL REQUIRED GREATER EFFORT TO TURN. THERE WAS A LOW POWER RESPONSE WHEN THE BRAKE PEDAL WAS DEPRESSED. IN ADDITION, THE SERVICE BRAKE BOOSTER WARNING INDICATOR ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE WAS TAKEN TO AN AU…

Read full complaint

TL*THE CONTACT OWNS A 2004 CHEVROLET SUBURBAN. WHILE DRIVING APPROXIMATELY 35 MPH, THE STEERING WHEEL REQUIRED GREATER EFFORT TO TURN. THERE WAS A LOW POWER RESPONSE WHEN THE BRAKE PEDAL WAS DEPRESSED. IN ADDITION, THE SERVICE BRAKE BOOSTER WARNING INDICATOR ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR INSPECTION. THE VIN WAS EXCLUDED FROM NHTSA CAMPAIGN ID NUMBER 05V043000 (SERVICE BRAKES, HYDRAULIC), ALTHOUGH THE FAILURES WERE IDENTICAL. THE FAILURE AND CURRENT MILEAGES WERE 23,400. UPDATED 08/28/09. *LJ UPDATED 08/31/09.*JB

NHTSA ODI #10279393

46,405 miles · Jan 10, 2008
Service Brakes, Hydraulic

NO INCIDENTS KNOWN. MASTER BRAKE CYLINDER LEAKS. VEHICLE ONLY HAS 46,000 MILES. I DO NOT TOW TRAILERS, CARRY HEAVY LOADS, OR APPLY HEAVY BRAKE PRESSURE WHEN STOPPING. APPEARS TO BE AN OBVIOUS DEFECT IN THE MASTER CYLINDER. COULD CAUSE ACCIDENT OR INJURY IF NOT INVESTIGATED AND CORRECTED. *TR

NHTSA ODI #10214384

39,000 miles · Sep 21, 2006
Service Brakes, HydraulicSteering

DT*: THE CONTACT STATED WHILE TRAVELING 5 MPH, THE POWER STEERING FAILED, THEN BOTH FEET WERE USED TO STOP THE VEHICLE. IT WAS TAKEN TO AN INDEPENDENT REPAIR SHOP WHO DETERMINED THE POWER STEERING AND BRAKE BOOSTER SYSTEM FAILED AND BOTH COMPONENTS WERE REPLACED.

NHTSA ODI #10168841

Mileage unknown · Aug 18, 2005
Service Brakes, Hydraulic

2004 CHEVROLET SUBURBAN REAR BRAKE PADS AND ROTORS ARE RUSTED.***NO ANSWER REQUIRED*** *MR RECALL CAMPAIGN# 04V0450000 & 05V04300. *SC

NHTSA ODI #10135583

Mileage unknown · May 26, 2005
Electrical SystemPower TrainService Brakes, Hydraulic

THE VEHICLE LOST IT'S SERVICE STABILITY CONTROL AT 40 MILES PER HOUR MAKING IT DIFFICULT FOR THE DRIVER TO MAINTAIN CONTROL OF THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER FOR REPAIR FOR THE FOURTH TIME, BUT THERE STILL CONTINUES TO BE A STEERING PROBLEM. *NM THERE WERE FIVE REPAIR ATTEMPTS TO REPAIR THE SYSTEM. THE BR…

Read full complaint

THE VEHICLE LOST IT'S SERVICE STABILITY CONTROL AT 40 MILES PER HOUR MAKING IT DIFFICULT FOR THE DRIVER TO MAINTAIN CONTROL OF THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER FOR REPAIR FOR THE FOURTH TIME, BUT THERE STILL CONTINUES TO BE A STEERING PROBLEM. *NM THERE WERE FIVE REPAIR ATTEMPTS TO REPAIR THE SYSTEM. THE BRAKES WOULD PULSE AND COME ON WHILE THE VEHICLE WAS IN MOTION FOLLOWED BY THE SERVICE STABILITY LIGHT. THE VEHICLE WOULD SHAKE VIOLENTLY AS IF IT WERE OUT OF CONTROL. THE TRANSMISSION WOULD SLIP AT TIMES. A SERVICE BULLETIN WAS FOUND IN RE TO THE CLUTCH. THE FORWARD CLUTCH SEAL/PISTON DISS PUMP AS WELL AS THE SHIFT CABLE. THE YAW RATE SENSOR TABLE WAS REPLACED AND THE ABS MODULE WAS REPROGRAMMED. THERE WAS POPPING COMING FROM THE LEFT WHEN TURNING DUE TO THE CROSSMEMBER. STATIC NOISE WAS HEARD UNDER THE DASH AT TIMES WHEN THE HEADLIGHTS FLICKERED. BOTH UPPER SHOCK INSULATORS WERE SQUEAKING. BOTH SHOCK INSULATORS WERE REMOVED AND REPLACED BY NEW STYLE INSULATORS. THE YAW RATE SENSOR WAS REPLACED AGAIN WITH ONE FORM A NEW UNIT, THE STEERING ROTATION SENSOR WAS REPLACED AND THE STABILITY MODULE WAS REPROGRAMMED. *SC *JB

NHTSA ODI #10108563

Official recalls

4

06V289000 · Engine And Engine Cooling

Aug 3, 2006

ON CERTAIN TRUCKS EQUIPPED WITH AN 8.1L V8 (RPO L8-VIN G) ENGINE HAVE A CONDITION IN WHICH THE ENGINE FUEL RAIL PULSE DAMPER RETAINER CLIP MAY FRACTURE RESULTING IN INADEQUATE RETENTION OF THE DAMPER.

Consequence & remedy

Consequence: IF THE DAMPER COMES LOOSE, A FUEL LEAK MAY RESULT. FUEL LEAKAGE, IN THE PRESENCE OF AN IGNITION SOURCE, COULD RESULT IN A FIRE.

Remedy: DEALERS WILL REPLACE THE ENGINE FUEL RAIL PULSE DAMPER RETAINER CLIP FREE OF CHARGE. THE RECALL BEGAN ON AUGUST 31, 2006. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438 AND GMC TRUCKS AT 1-866-996-9463.

05V163000 · Seat Belts:rear/other

Apr 22, 2005

ON CERTAIN CREW CAB PICKUP TRUCKS AND SPORT UTILITY VEHICLES, THE 2ND ROW CENTER OCCUPANT SEAT BELT ROUTING MAY MAKE IT DIFFICULT TO POSITION THE LAP PORTION OF THE SAFETY BELT LOW AROUND THE HIPS OF OCCUPANTS, ESPECIALLY SMALLER OCCUPANTS, SEATED IN THIS POSITION. APPROPRIATE USE OF A CHILD SEAT OR BOOSTER SEAT, AS RECOMMENDED FOR SMALL CHILDREN, DOES IMPROVE THE FIT CONDITION FOR THIS USER GROUP. IN ADDITION TO INSTRUCTIONS ON PROPER INFANT AND YOUNG CHILD RESTRAINT (WITH CHILD SEATS OR BOOSTERS), SPECIAL VERBIAGE FOR RESTRAINING OLDER CHILD IS INCLUDED IN THE OWNER'S MANUAL. ALSO, THE SUGGESTED SEAT BELT FIT/ROUTING FOR ADULTS, IRRESPECTIVE OF SEATING POSITION, IS DESCRIBED IN THE OWNER'S MANUAL TEXT.

Consequence & remedy

Consequence: A LAP PORTION OF THE SEAT BELT ROUTING THAT IS NOT LOW AND SNUG ON THE HIPS CAN ALLOW THE LAP BELT TO RIDE UP ON AN OCCUPANT'S ABDOMEN INSTEAD OF FITTING LOW AROUND THEIR HIPBONES, AND THEREFORE, CAN EXPOSE THEM TO MORE RISK OF ABDOMINAL AND INTERNAL ORGAN INJURY.

Remedy: DEALERS WILL CUT OPEN THE GUIDE LOOP, REMOVE A PORTION OF THE LOOP, AND THEN THE REMAINING TWO SIDES SHOULD BE FOLDED OVER AND SECURED WITH A RETAINER FREE OF CHARGE. THE RECALL BEGAN ON JULY 21, 2005. OWNERS MAY CONTACT CADILLAC AT 1-866-982-2339, CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, OR HUMMER AT 1-800-732-5493.

05V043000 · Service Brakes, Hydraulic

Feb 8, 2005

CERTAIN TRUCKS, SPORT UTILITY VEHICLES, AND VANS EQUIPPED WITH BOSCH HYDRO-BOOST BRAKE ASSEMBLIES, THE HYDRAULIC BRAKE BOOSTER PRESSURE ACCUMULATOR MAY CRACK AND SEPARATE FROM THE HYDRO-BOOST ASSEMBLY DURING NORMAL OPERATING CONDITIONS.

Consequence & remedy

Consequence: IF A SEPARATION OCCURRED AND THE HOOD OF THE VEHICLE WERE OPEN, FRAGMENTS FROM THE ACCUMULATOR COULD CAUSE INJURY TO PEOPLE IN THE IMMEDIATE AREA. THE PRESENCE OF THIS CRACK OR FRACTURED SURFACE COULD ALLOW THE HYDRAULIC FLUID TO LEAK FROM THE ACCUMULATOR CIRCUIT OF THE BOOSTER ASSEMBLY. THE LOSS OF FLUID WOULD CAUSE INCREASED STEERING AND BRAKING EFFORT AND A CRASH MAY OCCUR WITHOUT PRIOR WARNING.

Remedy: DEALERS WILL TEST THE HYDRO-BOOST ASSEMBLY FOR FUNCTIONAL OPERATION OF THE TWO-FUNCTION VALVE. IF THE HYDRO-BOOST ASSEMBLY FAILS THE TEST, DEALERS WILL REPLACE THE ASSEMBLY FREE OF CHARGE. THE RECALL BEGAN ON MARCH 23, 2005. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC TRUCKS AT 1-866-996-9463 AND HUMMER AT 1-800-732-5493.

04V045000 · Service Brakes, Hydraulic

Feb 4, 2004

CERTAIN SPORT UTILITY VEHICLES, PICKUP TRUCKS, AND PASSENGER VANS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 135, ?PASSENGER CAR BRAKE SYSTEMS.? SOME OF THESE VEHICLES WERE PRODUCED WITH AN OUT-OF-SPECIFICATION BRAKE HYDRO-BOOST HOUSING RELIEF VALVE BORE.

Consequence & remedy

Consequence: CONSEQUENTLY, THE VALVE O-RING SEAL MAY FRACTURE. STEERING EFFORTS MAY BE SLIGHTLY INCREASED WHILE BRAKING OR PARKING. UNDER CERTAIN DRIVING CONDITIONS, A FRACTURED SEAL MAY REQUIRE A SLIGHT INCREASE IN THE APPLIED BRAKE PEDAL EFFORT TO ACHIEVE THE SAME VEHICLE DECELERATION RATE AS PRIOR TO THE SEAT FRACTURE.

Remedy: DEALERS ARE TO REPLACE THE HYDRO-BOOST RELIEF VALVE. THE RECALL BEGAN ON JUNE 18, 2004. OWNERS SHOULD CONTACT CADILLAC AT 1-866-982-2339; CHEVROLET AT 1-800-630-2438; GMC AT 1-866-996-9463; OR HUMMER AT 1-866-486-6376.

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

EA04012 · Hydraulic Pump Failres

Opened Apr 30, 2004 · Closed Feb 28, 2005

Status: closed (inferred from source dates) · Service Brakes, Hydraulic:power Assist; Steering:hydraulic Power Assist System

GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.

Additional source detail variants (2)

Service Brakes, Hydraulic:power Assist

GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.

Steering:hydraulic Power Assist System

GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.