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2004 Chevrolet Avalanche

Owner reports · Recalls · Investigations

More warning signs than most Avalanche years

Owner complaints for the 2004 Chevrolet Avalanche are substantially higher than the model-year median of 82.

About this comparison →

When problems were reported

Mileage at the reported incident

140 reports with mileage · 25 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 60 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Service Brakes. Review the 25 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Service Brakes, Hydraulic. Review the 15 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

6 crash reports1 fire reports3 injury reports

Visibility complaints

9 reports
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102,000 miles · Aug 28, 2014
Electrical SystemVisibility

I WAS ISSUED A RECALL A FEW YEARS BACK SPECIFIC TO MY VEHICLE ABOUT A BLOWER MOTOR OPERATION MALFUNCTION. IT STATED THAT SETTINGS ON THE BLOWER MOTOR MAY NOT FUNCTION PROPERLY. FOR EXAMPLE, WHEN I TURN ON THE AIR OR HEAT I HAVE SETTINGS FOR 5 BLOWER MOTOR OPTIONS. ALL THE SETTINGS 1-4 WORK JUST FINE, SETTING 5 DOES NOT WORK A…

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I WAS ISSUED A RECALL A FEW YEARS BACK SPECIFIC TO MY VEHICLE ABOUT A BLOWER MOTOR OPERATION MALFUNCTION. IT STATED THAT SETTINGS ON THE BLOWER MOTOR MAY NOT FUNCTION PROPERLY. FOR EXAMPLE, WHEN I TURN ON THE AIR OR HEAT I HAVE SETTINGS FOR 5 BLOWER MOTOR OPTIONS. ALL THE SETTINGS 1-4 WORK JUST FINE, SETTING 5 DOES NOT WORK AT ALL. WHEN I SET HVAC TO SETTING 5 NO AIR BLOWS OUT. I HAVE SINCE THEN MISPLACED THAT RECALL NOTICE. IF YOU HAVE ANY INFORMATION ON THIS RECALL CAN YOU PLEASE GET IN CONTACT WITH ME THANK YOU *TR

NHTSA ODI #10629010

108,000 miles · Oct 15, 2011
Electrical SystemVisibility

SPEEDOMETER NOT WORKING AT ALL READS OVER 120 MPH EVEN WHEN TURNED OFF. ALL WINDOWS GET STUCK WHEN TRYING TO CLOSE THEM. *TR

NHTSA ODI #10430310

Mileage unknown · Apr 12, 2011
Visibility

RECEIVED A NOTICE THAT MY VEHICLE POSSIBLY HAD A RECALLED SUNROOF MANUFACTURED BY HOLLANDIA AT WEBASTO PRODUCT NORTH AMERICA, INC. PER THE PROVIDED INSTRUCTIONS, I WAS ABLE TO CONFIRM THAT MY CAR DOES HAVE AN AFTERMARKET SUNROOF AFFECTED BY THE RECALL. SINCE THE VEHICLE HAS BEEN TAKEN OVERSEES IT WOULD BE IMPOSSIBLE TO SEND IT …

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RECEIVED A NOTICE THAT MY VEHICLE POSSIBLY HAD A RECALLED SUNROOF MANUFACTURED BY HOLLANDIA AT WEBASTO PRODUCT NORTH AMERICA, INC. PER THE PROVIDED INSTRUCTIONS, I WAS ABLE TO CONFIRM THAT MY CAR DOES HAVE AN AFTERMARKET SUNROOF AFFECTED BY THE RECALL. SINCE THE VEHICLE HAS BEEN TAKEN OVERSEES IT WOULD BE IMPOSSIBLE TO SEND IT TO A SERVICE REPAIR SHOP. PLEASE INDICATE WHAT NEEDS TO BE DONE IN THIS CASE.

NHTSA ODI #10396350

23,965 miles · Mar 2, 2010
Electrical SystemEngine And Engine CoolingLatches/locks/linkages

TL*THE CONTACT OWNS 2004 CHEVROLET AVALANCHE. THE CONTACT WAS DRIVING 55 MPH WHEN THE RPMS INCREASED. THE CONTACT HAD DIFFICULTY SWITCHING GEARS AND THE VEHICLE LOST POWER. THE WINDSHIELD WIPERS WOULD NOT SHUT OFF UNLESS THE CONTACT RESTARTED THE VEHICLE. THE TRANSMISSION AND THE WATER PUMP FAILED COMPLETELY. THE DRIVER SIDE DO…

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TL*THE CONTACT OWNS 2004 CHEVROLET AVALANCHE. THE CONTACT WAS DRIVING 55 MPH WHEN THE RPMS INCREASED. THE CONTACT HAD DIFFICULTY SWITCHING GEARS AND THE VEHICLE LOST POWER. THE WINDSHIELD WIPERS WOULD NOT SHUT OFF UNLESS THE CONTACT RESTARTED THE VEHICLE. THE TRANSMISSION AND THE WATER PUMP FAILED COMPLETELY. THE DRIVER SIDE DOOR HANDLE BROKE AND THE CONTACT CANNOT GET OUT OF THE VEHICLE UNLESS SHE CLIMBS OVER THE PASSENGER SEAT. THE SPEEDOMETER ONLY DISPLAYED 10 AND 20 MPH WHENEVER IT WAS COLD OUTSIDE. THE FAILURE MILEAGE WAS 23,965 AND THE CURRENT MILEAGE WAS 97,323.

NHTSA ODI #10315737

69,000 miles · Dec 24, 2007
Visibility

MY HEATING AND AIR CONDITIONING SYSTEM DOES NOT FUNCTION CORRECTLY. IT HAS A MIND OF ITS OWN. IT ADJUSTS ITSELF FROM HOT TO COLD, COLD TO HOT. IT ADJUSTS ITSELF FROM LOW TO HIGH, HIGH TO LOW. OCCASIONALLY WHEN I SHUT OF THE TRUCK AND TAKE THE KEY OUT THE HEATING/COOLING SYSTEM WILL REMAIN ON. I CAN'T DRIVE IN COLD WEATHER PARTIC…

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MY HEATING AND AIR CONDITIONING SYSTEM DOES NOT FUNCTION CORRECTLY. IT HAS A MIND OF ITS OWN. IT ADJUSTS ITSELF FROM HOT TO COLD, COLD TO HOT. IT ADJUSTS ITSELF FROM LOW TO HIGH, HIGH TO LOW. OCCASIONALLY WHEN I SHUT OF THE TRUCK AND TAKE THE KEY OUT THE HEATING/COOLING SYSTEM WILL REMAIN ON. I CAN'T DRIVE IN COLD WEATHER PARTICULARLY IN THE MORNING OR WHEN ITS RAINING AFRAID THAT MY DEFROSTER/DEFOGGER WONT WORK BECAUSE OF THE PROBLEM. *TR

NHTSA ODI #10212648

Mileage unknown · Feb 27, 2007
Electrical SystemStructureVisibility

HERE'S ABOUT MY DISAPPOINTMENT WITH MY 2004 AVALANCHE WHICH I PURCHASED ON JULY 28, 2004 WITH 137 MILES ON THE ODOMETER. I PURCHASED THE VALUE GUARD GM PROTECTION PLAN. OF COURSE, THE VEHICLE WAS GREAT FOR THE FIRST 37,990 MILES. MY FIRST PROBLEM CAME ON 10/31/06, ONLY 2 YEARS 3 MONTHS AFTER PURCHASE DATE. MY TAILGATE HAN…

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HERE'S ABOUT MY DISAPPOINTMENT WITH MY 2004 AVALANCHE WHICH I PURCHASED ON JULY 28, 2004 WITH 137 MILES ON THE ODOMETER. I PURCHASED THE VALUE GUARD GM PROTECTION PLAN. OF COURSE, THE VEHICLE WAS GREAT FOR THE FIRST 37,990 MILES. MY FIRST PROBLEM CAME ON 10/31/06, ONLY 2 YEARS 3 MONTHS AFTER PURCHASE DATE. MY TAILGATE HANDLE BROKE WHILE OPENING IT HANDLE REPLACEMENT WAS $568. TO MY SURPRISE AND APPARENTLY ALSO TO THE REPRESENTATIVE FROM THE DEALERSHIP THE EXISTING SPOILER HAD TO BE TORN OFF AND REPLACED WITH A NEW ONE TO ACCESS THE HANDLE. THAT WAS AN ADDITIONAL $186 PLUS LABOR. I QUESTION THE DESIGNERS OF THE TAILGATE ASSEMBLY. WHY WOULD ANYONE DESIGN PARTS THAT WOULD HAVE TO BE DESTROYED IN ORDER TO SERVICE ANOTHER PART? IN FACT, WHY WOULD ANY PART THAT WOULD NORMALLY BE USED FREQUENTLY BY A REGULAR TRUCKER BREAK SO EASILY? OF COURSE, NEITHER THE WARRANTY NOR THE GM PROTECTION PLAN COVERED THIS. THE NEXT PROBLEM OCCURRED ON 12/27/06 AT 41,901 MILES, MY WINDSHIELD WIPERS WOULDN'T SHUTOFF. INTO THE DEALERSHIP WE WENT AND $334 LATER A WIPER BOARD WAS REPLACED. NO WARRANTY AGAIN COVERED THIS PROBLEM. I NO SOONER GOT HOME AND HAD TO RETURN ON 12/28/06 AT 41,944 MILES. NOW MY DASHBOARD LIGHT SERVICE 4 WHEEL DRIVE WAS ON. THIS TIME I WAS TOLD THE TRANSFER CASE ENCODER SHORTED OUT AND $779 LATER IT WAS FIXED. I MIGHT HAVE USED THE 4-WHEEL DRIVE 8-10 TIMES AT THE MOST. AT THAT TIME, I'D OWNED THIS VEHICLE FOR 29 MONTHS, THAT'S PRETTY SAD!! TODAY WITH THE LATEST EPISODE, I TRIED TO LOWER MY FRONT PASSENGER SIDE WINDOW AND IT WOULDN'T WORK. THE OTHER 3 WINDOWS WORK FINE. I WAITED AND TRIED AGAIN LATER STILL NO LUCK. I HEAR A CLICKING SOUND BUT NO ACTION.THIS PROBABLY MEANS ANOTHER VISIT TO THE DEALER. *NM

NHTSA ODI #10183701

50,000 miles · Jan 25, 2007
Electrical SystemVisibility

1) I HAVEN'T REPLACED ANYTHING, OR DONE ANYTHING THAT WOULD CAUSE THIS TO HAPPEN. 2) A-PROBLEM THAT IM EXPERIENCING IS THAT WHEN MY AVALANCHE IS SITTING STILL IN THE DRIVEWAY THE SPEEDOMETER SHOWS THAT I AM DOING 30 TO 40 MILES PER HOUR. WHEN I DRIVE ON THE FREEWAY IT COMPLETELY STOPS WORKING AND GOES TO OVER 120 MPH. B-MY D…

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1) I HAVEN'T REPLACED ANYTHING, OR DONE ANYTHING THAT WOULD CAUSE THIS TO HAPPEN. 2) A-PROBLEM THAT IM EXPERIENCING IS THAT WHEN MY AVALANCHE IS SITTING STILL IN THE DRIVEWAY THE SPEEDOMETER SHOWS THAT I AM DOING 30 TO 40 MILES PER HOUR. WHEN I DRIVE ON THE FREEWAY IT COMPLETELY STOPS WORKING AND GOES TO OVER 120 MPH. B-MY DRIVERS SIDE WINDOW DOESN'T WORK EITHER, THE MOTOR SLOWLY STARTED GIVING OUT ABOUT TWO MONTHS AGO. NOW IT DOESN'T WORK AT ALL. IT SEEMS LIKE MANY MORE CHEVY AVALANCHE OWNERS HAVE THE SAME ISSUE; HTTP://WWW.TOPIX.NET/FORUM/AUTOS/CHEVROLET-AVALANCHE/TJI11LGM9554MERNA 3)THE ONLY THING I DID FOR THE WINDOW NOT WORKING WAS CHECK SOME FUSES THAT WERE GOOD. *NM

NHTSA ODI #10180704

38,420 miles · Apr 22, 2006
Visibility

1)WINDSHIELD WIPERS WILL NOT TURN OFF, AND ONLY WORK ON 2 SPEEDS. NO VARIABLE. 2) I AM UNABLE TO USE WIPERS. FROM READING I NEED TO TAKE OUT FUSE, AND 3) HAVE THE CIRCUIT BOARD REPLACED. SEEMS TO OCCUR FREQUENTLY ENOUGH TO BE POSTED ON SEVERAL FORUMS. *NM

NHTSA ODI #10155894

19,000 miles · Dec 1, 2004
Visibility

NUTS RETAINING WIPER ARMS TO SHAFT LOOSENED ON BOTH DRIVER AND PASSENGER SIDE CAUSING WIPERS TO NOT MOVE. I TIGHTENED THE NUTS AS A TEMPORARY FIX AND WILL REPLACE WITH LOCK NUTS.*AK

NHTSA ODI #10100834

Official recalls

5

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.

04V129000 · Structure:body:tailgate:hinge And Attachments

Mar 17, 2004

ON CERTAIN PICKUP TRUCKS AND SPORT UTILITY VEHICLES, THE GALVANIZED STEEL TAILGATE SUPPORT CABLES THAT RETAIN THE TAILGATE IN THE FULL OPEN (HORIZONTAL) POSITION MAY CORRODE, WEAKEN, AND EVENTUALLY FRACTURE. IF BOTH CABLES FRACTURED, THE TAILGATE WOULD SUDDENLY DROP AND STRIKE THE TOP SURFACE OF THE REAR BUMPER.

Consequence & remedy

Consequence: ANYONE SITTING OR STANDING ON THE HORIZONTAL SURFACE OF THE TAILGATE WHEN BOTH CABLES FRACTURED COULD BE INJURED BY FALLING FROM THE TAILGATE. ON VEHICLES THAT HAVE HAD THE BUMPER REMOVED, THE TAILGATE MAY DROP EVEN LOWER. ADDITIONALLY, IF THERE IS CARGO ON THE TAILGATE THE CARGO MAY FALL OFF IF THE SUPPORT CABLES FRACTURE.

Remedy: DEALERS WILL REPLACE THE CABLES. INTERIM OWNER NOTIFICATION BEGAN ON APRIL 7, 20004. THE RECALL BEGAN ON SEPTEMBER 24, 2004, WHEN REPLACEMENT PARTS WERE AVAILABLE, AND WILL CONTINUE THROUGH OCTOBER 29, 2004. OWNERS SHOULD CONTACT CADILLAC AT 1-866-982-2339, CHEVROLET AT 1-800-630-2438 OR GMC AT 1-866-996-9463, OR VISIT WWW.MYGMLINK.COM, AND ENTER YOUR VEHICLE IDENTIFICATION NUMBER.

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.