2002 GMC Envoy

The subject vehicles are model year (MY) 2002-2009 Chevrolet Trailblazer, GMC Envoy, 2004-2007 Buick Rainier, 2003-2008 Isuzu Ascender, 2005-2009 Saab 9-7X, 2002-2004 Oldsmobile Bravada, 2003-2006 Chevrolet SSR, 2005-2009 Buick Lacrosse, and 2006-2008 Pontiac Grand Prix. This scope includes the Trailblazer/Envoy variants: 2002-2006 Envoy XL/Trailblazer EXT and 2004-2005 Envoy XUV. The original scope of this investigation was expanded to include all vehicles equipped with the subject Headlight Driver Module (HDM). The focus of the investigation was to determine whether actions performed by General Motors adequately addressed any unreasonable risk to motor vehicle safety in the subject vehicles concerning the headlights and the HDM that controls them.Under normal electrical load and environmental conditions, the HDM can overheat inside the Underhood Electrical Center (UEC). This can cause the module to fail and result in a simultaneous loss of both low beam headlights and both daytime running lights (DRLs), often with no warning or prior detectability to the driver. This failure can be intermittent or permanent. No other exterior lights are affected. High beams, turn signals, brake lights, and reverse lights are still operational.General Motors addressed this issue with 2 recalls (14V755 & 15V519) and a special coverage program (N172091910). In view of the recalls and special coverage program implemented by GM and the vehicle high beams continuing to operate, ODI has tentatively concluded that the actions taken by GM mitigate any unreasonable risk to safety posed by HDM failure in the subject vehicles.Accordingly, the investigation is closed. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist. The agency reserves the right to take additional action if warranted by new circumstances.The ODI reports cited above are available for review online at NHTSA.gov under the identification numbers in the attached document.

ON NOVEMBER 30, 2001, GENERAL MOTORS (GM) CONDUCTED SAFETY RECALL 01V-364 FOR THE SUBJECT VEHICLES BUILT BETWEEN SEPTEMBER 16, 1999 AND AUGUST 28, 2001 TO REMEDY A DEFECTIVE HAZARD SWITCH THAT WOULD CAUSE A LOSS OF HAZARD AND STOP LAMP ILLUMINATION.THE HAZARD SWITCH IS CONTAINED WITHIN THE VEHICLE MULTIFUNCTION SWITCH.ODI OPENED THIS INVESTIGATION BASED ON REPORTS THAT SOME CONSUMERS WERE NOT NOTIFIED OF THE ORIGINAL RECALL OR THAT THEY HAD REPAIRS DONE UNDER 01V-364 BUT EXPERIENCED SUBSEQUENT MULTIFUNCTION SWITCH FAILURES.THE MULTIFUNCTION SWITCH SUPPORTS THE OPERATION OF CRUISE CONTROL, WINDSHIELD WIPERS, EXTERIOR LIGHTING AND TURN SIGNALS IN ADDITION TO HAZARD AND STOP LAMPS. ON MAY 21, 2008, GM NOTIFIED THE AGENCY THAT IT ERRONEOUSLY MISSED IDENTIFYING 5,862 VEHICLES THAT SHOULD HAVE BEEN INCLUDED IN RECALL 01V-364.GM WILL NOW NOTIFY OWNERS OF THESE VEHICLES UNDER A NEW NHTSA RECALL NUMBER 08V-231.OWNER NOTIFICATION BEGAN ON JUNE 17.THE PRIMARY CAUSE OF BRAKE LAMP FAILURE WAS A DESIGN CHANGE FROM COPPER TO BRASS CONTACT MATERIAL IN THE HAZARD SWITCH.THIS CHANGE WAS EFFECTIVE FOR VEHICLES BUILT AFTER SEPTEMBER 16, 1999.GM CHANGED THE MATERIAL BACK TO COPPER FOR VEHICLES BUILT AFTER AUGUST 28, 2001. THE REMEDY PART FOR BOTH 01V-364 AND 08V-231 CONTAINS COPPER CONTACTS.GM'S DATA SHOWS THAT LESS THAN 1% OF VEHICLES REPAIRED UNDER RECALL 01V-364 REQUIRED ADDITIONAL SUBSEQUENT REPAIR OR REPLACEMENT OF THE HAZARD OR MULTIFUNCTION SWITCH.THIS INVESTIGATION IS CLOSED.

DURING THE COURSE OF THIS EA INVESTIGATION, ODI OBSERVED THAT THE MAJORITY OF THE COMPLAINTS (88%) AND WARRANTY CLAIMS (94%) WERE REPORTED FOR VEHICLES THAT ARE REGISTERED FOR USE IN THE SALT BELT REGION OF THE US.THIS AREA INCLUDES 20 STATES IN THE NORTHEAST, MID ATLANTIC AND THE MIDWEST REGIONS AND THE DISTRICT OF COLUMBIA.CONSUMERS IN THE SALT BELT REGION REPORTED TO ODI THAT THEY COULD SMELL FUEL VAPORS IN THEIR VEHICLES WHILE DRIVING.UPON FURTHER EXAMINATION OF THEIR VEHICLES, THEY DISCOVERED THAT FUEL VAPORS WERE COMING OUT OF THE TOP OF THE FUEL TANK. THIS CONDITION IS CAUSED BY CORROSION OF THE RETURN AND SENDER LINES OF THE FUEL PUMP MODULE.WATER AND ROAD SALT COLLECT ON TOP OF THE FUEL PUMP LEADING TO SMALL PINHOLES APPEARING ON THE FUEL LINES.FUEL MAY LEAK AND COLLECT ON TOP OF THE MODULE AND/OR SPILL ONTO THE GROUND.THE DATA EVALUATED UNDER THIS INVESTIGATION REFLECT A RELATIVELY LOW FREQUENCY OF OCCURRENCE THAT LARGELY ARISES IN SALT BELT STATES.GM HAS EXTENDED THE WARRANTY ON THE SUBJECT COMPONENT TO TEN YEARS OR 120,000 MILES.FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED AT THIS TIME; ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT NO SAFETY-RELATED DEFECT EXISTS.THE AGENCY RESERVES THE RIGHT TO TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.FOR ADDITIONAL INFORMATION SELECT DOCUMENT SEARCH.

ODI HAS RECEIVED REPORTS THAT THE FUEL PUMP MODULE LEAKS FUEL AND OR VAPOR UNDERNEATH THE VEHICLE.GM STATES, THE FAILURE MECHANISM IS CORROSION OF THE FUEL PUMP MODULE FLANGE WHICH MAY LEAD TO A FUEL LEAK.CORROSION OF THE FUEL PUMP MODULE FLANGE IS THE RESULT OF THE VEHICLE OPERATING IN A CORROSIVE ENVIRONMENT.ODI HAS UPGRADED THIS PE TO ENGINEERING ANALYSIS (EA07-009) TO FURTHER ASSESS THIS ISSUE.

Vehicle listed caught on fire while driving on interstate with unknown cause. No previous warnings. Was a risk to safety of driver/and or passengers.

NHTSA ID

11748101

Incident

Jul 3, 2025

My vehicle has developed a leak in the plastic fuel tank at the junction of the fill hose connection and the body of the tank that is causing release of flammable vapors and liquid gasoline underneath the vehicle and causing failure of emissions systems. These vehicles have a rampant and long-standing reputation for developing leaks in their plastic fuel tanks at this location which cannot be repaired by any normal means available to a consumer. Virtually all of these vehicles eventually develop leaks, which cause release of flammable fuel vapors and raw gasolene releases. Why isn't there a recall on these faulty fuel tanks? The manufacturer only provided a short-term solution for a limited period of time that is no longer available for vehicles that still have the leaking tanks. The condition is dangerous.

NHTSA ID

11700025

Incident

Sep 17, 2025

These vehicles have a rampant and long-standing reputation for developing leaks in their plastic fuel tanks. Virtually all of these vehicles eventually develop leaks, which cause release of flammable fuel vapors and raw gasolene releases. Why isn't there a recall on these faulty fuel tanks? The manufacturer only provided a short term solution for a limited period of time that is no longer available for vehicles that still have the leaking tanks. My vehicle now has a bad fuel tank leak that causes emissions test failure and leaks liquid gasolene. Surely a safety recall should be issued?

NHTSA ID

11699610

Incident

Sep 17, 2025

Went to store bought food Left store and car started chugging and losing power When I got home my son said he could smell exhaust and it sounds like the catalytic converter

NHTSA ID

11673039

Incident

Jul 9, 2025

There are previously fixed recalls starting to pop up one at a time if they were fixed they wouldnt be back causing problems can someone check into this and let me know something I drive a 02 gmc envoy slt 4x4 4.2l. The mileage is unknown due to instrument cluster not working on the DIC settings.I purchased under the pretenses it only had 188000 miles but ive seen higher milage on some shop records also the Center console lid dont latch and other things I cant think of at the moment

NHTSA ID

11515298

Incident

Apr 19, 2021

Passenger front seat belt locks automatically as soon as you buckle up. It will not unlock, the only way to fix it is to unbuckle and re buckle then it locks again. Very uncomfortable to ride in the front Passenger seat.

NHTSA ID

11477149

Incident

Aug 2, 2022

The contact owns a 2002 GMC Envoy. The contact stated that while driving at an undisclosed speed, the vehicle was shaking. Upon inspection, the contact noticed that the rear subframe had fractured and detached. The vehicle was taken to an independent mechanic who diagnosed that the subframe needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA. The failure mileage was approximately 150,000.

NHTSA ID

11456854

Incident

Jan 1, 2022

Mileage

150,000 mi

TL* THE CONTACT OWNS A 2002 GMC ENVOY. THE CONTACT SATED THAT THE VEHICLE FAILED TO SHIFT OUT OF DRIVE INTO THE PARK POSITION. THE PARKING BRAKE WAS ENGAGED TO SECURE THE VEHICLE FROM MOVING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO REPLACED THE SHIFTER LINKAGE BUSHING. THE MANUFACTURER WAS CONTACTED AND INFORMED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 196,000.

NHTSA ID

11373986

Incident

Nov 8, 2020

Mileage

196,000 mi

This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.

This Preliminary Information communication provides information to the technician about vehicles that have an unusual noise and is difficult to identify, isolate or pinpoint. Technician should get record a sound clip or take a video of the noise for assessment by engineering. Technician will need to call General Motors Technical Assistance Center for further assistance.

This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester  and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.

This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.

This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.

Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined approach for dealers and customers.