IllustrationENGINE LIGHT ILLUMINATED WITH ERROR CODE P0449(EVAPORATIVE EMMISION SYSTEM VENT/VALVE SOLENOID CIRCUIT. *TR
2008 Chevrolet Trailblazer
Owner reports · Recalls · Investigations
More warning signs than most Trailblazer years
Owner complaints for the 2008 Chevrolet Trailblazer are substantially higher than the model-year median of 87.5.
About this comparison →How this year compares
Owner complaints by model year
Compare all Trailblazer years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
250–25K
2125–50K
4250–75K
3675–100K
27100–150K
18150K+
169 reports with mileage · 24 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 65 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Air Bags. Review the 33 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine. Review the 21 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
10 crash reports11 fire reports8 injury reports
What owners actually said
193 reportsWITH ONLY 55,000 MILES, THE EXHAUST MANIFOLD CRACKED. SEEING ALL OF THE COMPLAINTS ONLINE AND TALKING TO MY MECHANIC, THIS SEEMS TO BE A DEFAULT PART. CHEVY SHOULD BE RECALLING THESE. MY MECHANIC HAD TO ORDER THE PART THROUGH THE DEALER AND THEY HAD THE REPLACEMENT MANIFOLD IN STOCK. EXHAUST MANIFOLDS ARE NOT NORMALLY STOCK …
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WITH ONLY 55,000 MILES, THE EXHAUST MANIFOLD CRACKED. SEEING ALL OF THE COMPLAINTS ONLINE AND TALKING TO MY MECHANIC, THIS SEEMS TO BE A DEFAULT PART. CHEVY SHOULD BE RECALLING THESE. MY MECHANIC HAD TO ORDER THE PART THROUGH THE DEALER AND THEY HAD THE REPLACEMENT MANIFOLD IN STOCK. EXHAUST MANIFOLDS ARE NOT NORMALLY STOCK ITEMS UNLESS THERE IS A REAL HIGH NEED TO REPLACE THEM....... *TR
WE PURCHASED A 2008 CHEVROLET TRAILBLAZER IN SEPTEMBER 2008. THE DAY WE DROVE IT HOME THE ENTIRE ELECTRICAL SYSTEM SHUT DOWN. THE LIGHTS, LOCKS, BLINKERS, AND ALL GAUGES WERE NOT WORKING. THE VEHICLE WAS TAKEN BACK TO THE CHEVROLET DEALER AND THE ONSTAR MODULE WAS REPLACED. A FEW MONTHS LATER THE ELECTRICAL SYSTEM FAILED AGAI…
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WE PURCHASED A 2008 CHEVROLET TRAILBLAZER IN SEPTEMBER 2008. THE DAY WE DROVE IT HOME THE ENTIRE ELECTRICAL SYSTEM SHUT DOWN. THE LIGHTS, LOCKS, BLINKERS, AND ALL GAUGES WERE NOT WORKING. THE VEHICLE WAS TAKEN BACK TO THE CHEVROLET DEALER AND THE ONSTAR MODULE WAS REPLACED. A FEW MONTHS LATER THE ELECTRICAL SYSTEM FAILED AGAIN, THIS HAS HAPPENED 3 MORE TIMES SINCE PURCHASING THE VEHICLE 3 YEARS AGO. THE VEHICLE HAS ALSO HAD THE CHECK ENGINE AND STABILITRACK LIGHTS TURN ON AND OFF NUMEROUS TIMES...SOMETIMES FOR A DAY OR TWO, SOMETIMES FOR A WEEK. THE VEHICLE HAS BEEN IN THE SHOP MORE THAN 13 TIMES IN 3 YEARS FOR ELECTRICAL RELATED PROBLEMS, SEVERAL ELECTRICAL MODULES HAVE BEEN REPLACED. MY GRANDMOTHER HAS THE SAME VEHICLE AND HAS HAD THE SAME TYPE OF PROBLEMS WITH THE ELECTRICAL SYSTEM. *TT
2008 TRAILBLAZER WITH A CRACKED EXHAUST MANIFOLD. *TR
MY BLAZER ALSO SHOWS THAT THERE IS NO FUEL, EVEN THOUGH I JUST FILLED UP! I WOULD LIKE TO KNOW WHAT THE PROBLEM IS? *TR
2008 CHEVY TRAILBLAZER CRACKED EXHAUST MANIFOLD AT 62,000 MILES QUOTED THAT THE REPAIR WOULD BE $600-700. AFTER DOING RESEARCH THERE ARE MANY OCCURRENCES OF THIS PROBLEM WHEN WILL THERE BE A RECALL ON THIS BAD MANIFOLD??? *TR
TL*THE CONTACT OWNS A 2008 CHEVROLET TRAILBLAZER. THE CONTACT STATED THE VOLTAGE REGULATOR WAS CORRODED AND CAUSED THE BRAKE LIGHT UNIT ON THE REAR DRIVER'S SIDE TO ALSO CORRODE. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE SOCKETS WERE REPLACED BUT THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO A SECOND DEALER WHER…
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TL*THE CONTACT OWNS A 2008 CHEVROLET TRAILBLAZER. THE CONTACT STATED THE VOLTAGE REGULATOR WAS CORRODED AND CAUSED THE BRAKE LIGHT UNIT ON THE REAR DRIVER'S SIDE TO ALSO CORRODE. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE SOCKETS WERE REPLACED BUT THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO A SECOND DEALER WHERE THE ALTERNATOR WAS REPLACED. THE FAILURE CONTINUED. THE VEHICLE WAS THEN TAKEN TO A THIRD DEALER WHERE IT WAS AWAITING REPAIRS. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE WHEN THE CONTACT NOTIFIED THEM TO FILE A COMPLAINT. THE FAILURE MILEAGE WAS 6,000 AND THE CURRENT MILEAGE WAS 50,000.
THE LIFTBACK EMBLEM ON THE BACK OF THE CAR AND THE EMBLEM ON THE FRONT BEGAN TO DISINTEGRATE AFTER ABOUT ONE YEAR. I DON'T HAVE ANY REASON IT JUST STARTED. PEOPLE AND MECHANICS HAVE BEEN TELLING ME THAT THEY WERE BAD AND THE REPLACEMENT WAS HIGH. *TR
I WAS DRIVING DOWN A STATE HIGHWAY WITH MY CRUISE CONTROL SET AT 57 MPH AND ALL OF THE SUDDEN ALL OF THE LIGHTS CAME ON IN THE CONSOLE. MY ON STAR DID NOT WORK, NOR DID THE RADIO OR ANYTHING ELECTRICAL IN MY VEHICLE. MY VEHICLE WAS STILL RUNNING, BUT NONE OF THE GAUGES, LIGHTS, WINDOWS, ETC. WERE WORKING. I PULLED TO THE SIDE…
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I WAS DRIVING DOWN A STATE HIGHWAY WITH MY CRUISE CONTROL SET AT 57 MPH AND ALL OF THE SUDDEN ALL OF THE LIGHTS CAME ON IN THE CONSOLE. MY ON STAR DID NOT WORK, NOR DID THE RADIO OR ANYTHING ELECTRICAL IN MY VEHICLE. MY VEHICLE WAS STILL RUNNING, BUT NONE OF THE GAUGES, LIGHTS, WINDOWS, ETC. WERE WORKING. I PULLED TO THE SIDE OF THE ROAD AND THEN DROVE IT TO THE DEALERSHIP. THE DEALERSHIP KEPT THE VEHICLE FOR 3 WEEKS AND WERE NOT ABLE TO DIAGNOSE NOR FIX THE PROBLEM. ALL OF THE SUDDEN 3 WEEKS LATER THEY GOT INTO THE VEHICLE AND THE PROBLEM HAD RESOLVED ITSELF.
I WAS DRIVING THE TRAILBLAZER WENT TO PUT GAS IN IT AT QT AND FILLED THE CAR FULL OF 87. WENT TO START THE CAR AND THE ENGINE LIGHT CAME ON AND THE GAS GAUGE IS AT EMPTY AND THE LIGHT IS ON. THIS HAPPENS EVERY TIME THE CAR IS TURNED ON THIER IS NOTHING WRONG WITH THE CAR MOTOR IS FINE NOT RUNNING HOT OR ANYTHING OIL IS FINE. *T…
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I WAS DRIVING THE TRAILBLAZER WENT TO PUT GAS IN IT AT QT AND FILLED THE CAR FULL OF 87. WENT TO START THE CAR AND THE ENGINE LIGHT CAME ON AND THE GAS GAUGE IS AT EMPTY AND THE LIGHT IS ON. THIS HAPPENS EVERY TIME THE CAR IS TURNED ON THIER IS NOTHING WRONG WITH THE CAR MOTOR IS FINE NOT RUNNING HOT OR ANYTHING OIL IS FINE. *TR
Official recalls
0No recalls in this snapshot.
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
1RQ17002 · Loss Of Headlights
Opened Apr 24, 2017 · Closed Mar 29, 2021
Status: closed (inferred from source dates) · Exterior Lighting:headlights
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.