2009 Chevrolet Trailblazer

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.

My first complaint is that headlights, low beam, would not work. Only high beams worked. The issue stopped, unexplainable, on its own, has not occurred again. The 2nd complaint is the radio volume would 'slip' as if there were a loose wire to the speakers, and loss of sound became more frequent and for longer periods of time, eventually all sound stopped, it has not been fixed, as of yet. 3rd complaint, a brand new battery, in under a year of use, went completely dead, without any visible explanation. When an attempt to jump start the vehicle the cables from another cars battery were touched at my cars battery, it sparked, indicating to the person performing the task, there is a 'short' somewhere in the wiring system. I drive this vehicle less than 3000 miles per year, and use it sporadically with my second vehicle to keep the batteries active. I cannot explain why these issues are occurring but thought it important to mention them to other possible victims with the same issues.

NHTSA ID

11747022

Incident

Sep 15, 2023

TRAVELING ON HIGHWAY APPLIED BRAKES AND HIT CAR IN REAR. AIR BAGS NOT DEPLOYED.

NHTSA ID

11184731

Incident

Feb 22, 2019

TL* THE CONTACT OWNS A 2009 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE HEADLIGHTS AND DAYTIME RUNNING LIGHTS FAILED TO OPERATE. THE CONTACT HAD TO USE THE HIGH BEAM HEADLIGHTS TO DRIVE. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE LOCAL DEALER WAS NOT CONTACTED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 136,731.

NHTSA ID

11131077

Incident

Sep 24, 2018

Mileage

136,731 mi

CRACKED EXHAUST MANIFOLD

NHTSA ID

11078549

Incident

Oct 5, 2017

Mileage

83,000 mi

THE ENGINE LIGHTS COME ON, THEN THE CAR STARTS CHUGGING AND SHUDDERING AND SOUNDS AND FEELS AS IF IT WILL SHUT DOWN. I AM NOT ABLE TO ACCELERATE. THIS IS A SERIOUS SAFETY RISK IN TRAFFIC, ESPECIALLY IF DRIVING ON THE INTERSTATE. THE CAR WILL NOT MOVE AT ANYTHING OVER 20 MPH, IF IT EVEN ACCELERATES AT ALL. I USUALLY END UP COASTING TO THE SIDE OF THE ROAD AND SHUTTING THE ENGINE DOWN. I LET IT SIT AND TURN IT BACK ON AND IT MAY OR MAY NOT LET ME GO AGAIN. *TR

NHTSA ID

11067138

Incident

Feb 5, 2018

Mileage

104,000 mi

WHILE DRIVING THE LOW BEAM HEADLIGHTS WILL GO OUT. AND NOT COME BACK ON YOU HAVE TO TURN ON HIGH BEAMS TO HAVE HEADLIGHTS STOPPED AND PULLED OVER TURNED OFF THE VEHICLE TURNED IT BACK ON AND LOW BEAMS STILL DID NOT COME BACK ON

NHTSA ID

11042969

Incident

Nov 2, 2017

Mileage

157,654 mi

THE LOW BEAM HEADLIGHTS KEEP GOING OUT. ALL OTHER LIGHTS STAY ON AND THE HIGH BEAM LIGHTS WORK. ONLY THE LOW BEAM HEADLIGHTS ARE AFFECTED. THIS HAS HAPPENED WHILE IN MOTION AND FROM A STOPPED POSITION WHEN FIRST STARTING THE CAR AND PUTTING IT IN DRIVE. I HAVE RESEARCHED IT ON SEVERAL GROUP WE SIGHTS AND FOUND THAT THE PROBLEM IS THE HEADLIGHT DIMMER MODULE (HDM). I HAVE REPLACED THIS TWO TIMES OVER THE LAST TWO YEARS WHICH ALWAYS FIXES IT FOR ABOUT A YEAR THEN IT STARTS FAILING AGAIN. THIS IS A VERY DANGEROUS SITUATION BECAUSE IT HAPPENS AFTER DARK. I CAN PULL OVER AND STOP, OPEN THE HOOD AND TAKE OFF THE FUSE BOX COVER AND REMOVE THE HDM AND PUT IT BACK IN THE SOCKET. SOMETIMES THIS WORKS AND SOMETIMES NOT. IT IS A DANGEROUS SITUATION. THERE HAVE BEEN RECALLS ON EARLIER TRAILBLAZERS BUT NOT THIS YEAR. IT SHOULD BE INCLUDED.

NHTSA ID

10956853

Incident

Feb 14, 2017

Mileage

85,000 mi

TL* THE CONTACT OWNED A 2009 CHEVROLET TRAILBLAZER. WHILE DRIVING 70 MPH, THE CONTACT'S VEHICLE REAR ENDED ANOTHER VEHICLE. IN TURN, THE CONTACT'S VEHICLE WAS STRUCK BY A SEMI-TRUCK. THE AIR BAGS DID NOT DEPLOY. A POLICE REPORT WAS FILED. THE CONTACT SUSTAINED INJURIES TO THE HEAD, KNEES, AND ARMS, WHICH REQUIRED MEDICAL ATTENTION. THE VEHICLE WAS DESTROYED AND TOWED. THE MANUFACTURER WAS NOT MADE AWARE OF THE CRASH. THE FAILURE MILEAGE WAS 135,000.

NHTSA ID

10944639

Incident

Jan 6, 2017

Mileage

135,000 mi

New Vehicle Monitoring Programs Section in IVH

This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, B3935, C0750, C0755, C0760, C0765, and/or C0775.

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 the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.

This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.

This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.