Trailblazer (1st)
NHTSA Safety Ratings About NHTSA ratings
Reliability Overview
The 1st-gen Chevrolet Trailblazer logged 7,931 NHTSA complaints across eight model years, with 253 fires, 29 deaths, and 26 recall campaigns. That is still among the worst reliability records of any midsize SUV sold in the United States that decade, even after the ODI-duplication correction trimmed the raw complaint count. The GMT-360 platform also underpinned the GMC Envoy, Buick Rainier, Saab 9-7x, and Isuzu Ascender, so the failure patterns documented here apply to a wider used market than the Chevy badge alone suggests.
Most of that history traces back to one engine. The Atlas 4.2L inline-six (LL8) generated 5,700 of the 7,931 complaints, or 72% of the total, with 210 fires and 9 deaths in NHTSA's data. The dominant story on the LL8 is not internal mechanical failure but a body harness, front power-distribution module, and underhood fire pattern that GM addressed across multiple recall campaigns. Cylinder head failures, valve seat erosion, and intake manifold gasket leaks show up in the engine bucket, but those internal items are dwarfed by the electrical and fuel-system entries the same trucks generate.
Across the platform, the top failure categories ranked by complaint count are electrical (2,716), fuel system (2,421), exterior (859), transmission (698), and engine (585). The electrical bucket is heavily driven by the body control module and driver's-door master power window switch, which corroded internally and overheated to the point of producing smoke or fire. The exterior category is largely the taillamp socket meltdown that deformed housings and in some cases ignited. The fuel-system bucket reflects multiple gas-tank and fuel-line campaigns, which is why NHTSA recorded 253 fires against this generation in total. Other recurring recall themes include windshield wiper module failures, transfer case range collar cracks, front lower control arm bracket fracture, and driver-side air bag inflator weld defects.
The V8 variants are less broken. The 5.3L LH6 (TrailBlazer EXT) shows 189 complaints and 7 fires, the 6.0L LFC/LS2 (TrailBlazer SS) shows 90 complaints and 3 fires. Both rate avoid by the segment-relative algorithm, but their failure densities are roughly an order of magnitude below the inline-six. They ride on the same platform, so the chassis, brakes, suspension, body-control, and fuel-system failure modes still apply. A lower-mileage V8 truck is not a workaround for the platform's problems, only for the LL8-specific ones. A separate 1,929-complaint unidentified-engine bucket carries 33 fires and 16 deaths, and most of those VINs decode back to LL8 trucks once cross-referenced against production records.
This generation is hard to recommend as primary transportation. Used pricing has dropped low enough that some buyers see it as an entry-level body-on-frame option, and the SS still has an enthusiast following on the V8 side. For anyone outside that narrow case, a contemporary Toyota 4Runner or Honda Pilot built through the same years carries materially better complaint and recall data, and neither one ships with a 253-fire generational tally.
Engine Reliability Ratings
LH6
5.3L 8-cylView details
Complaint Breakdown
Known Issues
LFC/LS2
6.0L 8-cylView details
Complaint Breakdown
Known Issues
LL8
4.2L 6-cylView details
Complaint Breakdown
Known Issues
Chevrolet Trailblazer Unidentified Engine
View details
Complaint Breakdown
Known Issues
Show 11 additional engine variants with limited data
L43
2.2LView details
Complaint Breakdown
Known Issues
LY7
3.6L 6-cylView details
Complaint Breakdown
Known Issues
LC9
5.3L 8-cylView details
Complaint Breakdown
Known Issues
L65
6.5L 8-cyl TurboView details
Complaint Breakdown
Known Issues
LU3
4.3L 6-cylView details
Complaint Breakdown
Known Issues
L34
2.0L 4-cylView details
Complaint Breakdown
LAX
2.4L 4-cylView details
Complaint Breakdown
Known Issues
LZ9
3.9L 6-cylView details
Complaint Breakdown
Known Issues
3.8-V6-Gas
3.8L 6-cylView details
Complaint Breakdown
Known Issues
LNJ
3.4L 6-cylView details
Complaint Breakdown
Known Issues
LLY
6.6L 8-cyl TurboView details
Complaint Breakdown
Vehicle-Level Issues
These issues affect the Chevrolet Trailblazer regardless of engine variant.
Buyer's Guide
Skip the 4.2L inline-six (engine code LL8) if you can. It is the dominant complaint source by an order of magnitude, and 210 of the generation's 253 fires sit on this engine code. The failure modes are expensive on a body-on-frame truck: cylinder head replacement runs into four figures of parts and labor, and the body-harness and power-distribution-module issues can be intermittent and slow to diagnose. The 5.3L V8 LH6 (TrailBlazer EXT) and 6.0L V8 LFC/LS2 (TrailBlazer SS) generate a fraction of the per-year complaint rate and are mechanically simpler to service. Engine choice matters more than model year on this generation.
Inspection priorities before buying any 1st-gen Trailblazer: Underhood wiring: pull the engine cover and inspect the body harness and front power-distribution module for heat damage or melted insulation. Exterior lighting: check the taillamp sockets for melting or charring at the back of the housings, not just the lenses. Front suspension: inspect the front lower control arm brackets and confirm they are intact and uncracked. Wipers: cycle through all speeds and the intermittent setting to confirm consistent operation. Transfer case: on 4WD models, confirm clean shifts between 2H, 4H, and 4L. Cooling and fuel: pressure-test the cooling system and pull a fuel pressure reading at idle. Verify all 26 recall campaigns are closed via NHTSA's VIN lookup at recalls.nhtsa.dot.gov, since several safety-critical items still have remediation parts available through GM dealers at no cost.
Used pricing is low enough that the math sometimes works if the buyer can do the maintenance themselves and accepts the failure patterns. For a buyer paying shop rates, the deferred maintenance cost on a high-mileage LL8 truck routinely exceeds the value of the vehicle within two repair cycles, and the fire-recall history is a hard argument against parking one in an attached garage overnight.
Recalls (26)
General Motors LLC (GM) is recalling certain model year 2006-2007 Buick Rainier, Chevrolet Trailblazer and GMC Envoy vehicles, and 2006 GMC Envoy XL and Chevrolet Trailblazer EXT vehicles. Fluid may enter into the driver's door master power window switch module, causing corrosion that could result in a short in the circuit board, causing window switches to become inoperative. Previously, the affected vehicles may have had their master power window switch module treated with a protective coating, instead of having it replaced.
General Motors LLC (GM) is recalling certain model year 2007 Pontiac Grand Prix, 2006-2009 Buick LaCrosse, 2006-2007 Buick Rainier, Chevrolet Trailblazer, GMC Envoy, 2006 Chevrolet Trailblazer EXT, GMC Envoy XL, 2006-2008 Isuzu Ascender, and Saab 9-7x vehicles. In the affected vehicles, the headlamp driver module (HDM) may overheat and fail, causing the headlamps and daytime running lights to not illuminate.
General Motors LLC (GM) is recalling certain model year 2005-2007 SAAB 9-7x; 2006 Chevrolet Trailblazer EXT and GMC Envoy XL; and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier and Isuzu Ascender vehicles. Fluid may enter the driver's door master power window switch module, causing corrosion that could result in a short in the circuit board. A short may cause the power door lock and power window switches to function intermittently or become inoperative. The short may also cause overheating, which could melt components of the door module, producing odor, smoke, or a fire.
General Motors (GM) is recalling certain model year 2005-2007 SAAB 9-7x; 2006 Chevrolet Trailblazer EXT and GMC Envoy XL; and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier and Isuzu Ascender vehicles. Fluid may enter the driver's door module, causing corrosion that could result in a short in the circuit board. A short may cause the power door lock and power window switches to function intermittently or become inoperative. The short may also cause overheating, which could melt components of the door module, producing odor, smoke, or a fire.
General Motors (GM) is recalling certain model year 2006 Chevrolet Trailblazer EXT and GMC Envoy XL and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, SAAB 9-7x, and Isuzu Ascender vehicles, originally sold or currently registered in Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin, and the District of Columbia. Fluid may enter the driver's door module, causing corrosion that could result in a short in the circuit board. A short may cause the power door lock and power window switches to function intermittently or become inoperative. The short may also cause overheating, which could melt components of the door module, producing odor, smoke, or a fire.
CERTAIN VEHICLES ORIGINALLY BUILT WITH CLOTH SEATS THAT WERE EQUIPPED WITH AN AUTOMATIC AIR BAG PASSENGER SENSING SYSTEM AND LATER REUPHOLSTERED WITH AFTERMARKET LEATHER SEAT COVER KITS ARE INVOLVED. TESTING HAS INDICATED THAT THE AFTERMARKET LEATHER SEAT COVERS CAN CAUSE THE PASSENGER SENSING SYSTEM TO MALFUNCTION.
CERTAIN POLI-AUTO COMBINATION HEADLAMP ASSEMBLIES, P/NOS. 11-728, 11-728D, 11-710, 11-419, 11-713, 11-703, 11-704, 11-708P, 11-735, 11-725, 11-726, 11-716 (P&C), 11-721-1, 11-733, 11-729, 11-730, AND 11-732, SOLD AS REPLACEMENT LAMPS FOR USE ON CERTAIN PASSENGER VEHICLES. SOME COMBINATION LAMPS THAT ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT."
CERTAIN SPORT UTILITY VEHICLES HAVE A REAR SIDE CLOSURE LATCH THAT MAY NOT LATCH OR UNLATCH DUE TO CORROSION CAUSED BY ROAD SPLASH, SUCH AS WATER AND ROAD SALT. THESE VEHICLES WERE ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE FOLLOWING STATES: CONNECTICUT, DELAWARE, ILLINOIS, INDIANA, IOWA, MAINE, MARYLAND, MASSACHUSETTS, MICHIGAN, MINNESOTA, MISSOURI, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, VERMONT, WEST VIRGINIA, WISCONSIN, AND THE DISTRICT OF COLUMBIA.
CERTAIN TRUCKS AND SPORT UTILITY VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 110, "TIRE SELECTION AND RIMS." THESE VEHICLES WERE SHIPPED WITH TIRE AND LOADING INFORMATION LABELS LISTING AN INACCCURATE VEHICLE CAPACITY WEIGHT.
CERTAIN PASSENGER VEHICLES MAY HAVE BEEN BUILT WITH A POWER STEERING HOSE THAT IS NOT TO SPECIFICATION. UNDER EXTREME STEERING MANEUVERS, SUCH AS TURNING THE STEERING WHEEL FULLY TO THE LEFT OR RIGHT WHILE BRAKING, THE HOSE MAY FRACTURE AND LEAK FLUID.
ON CERTAIN TRUCKS AND SPORT UTILITY VEHICLES, THE DRIVER WISHING TO SIGNAL A TURN BY MOVING THE DIRECTIONAL SIGNAL LEVER, (UP OR DOWN) MAY CAUSE THE FRONT MARKER/TURN LIGHTS AND REAR TURN LIGHTS TO FLASH IN A MANNER SIMILAR TO HAZARD WARNING, RATHER THAN FLASHING ON THE DESIRED SIDE ONLY.
CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 212, 'WINDSHIELD MOUNTING.' THE WINDSHIELD URETHANE BEAD MAY NOT HAVE ADHERED TO THE BODY IN CERTAIN AREAS DURING THE CURE PROCESS.
CERTAIN LIGHT DUTY PICKUP TRUCKS AND SPORT UTILITY VEHICLES FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 209, "SEAT BELT ASSEMBLIES." ONE OF THE TWO SENSORS IN THE DRIVER'S AND FRONT PASSENGER'S SEAT BELT RETRACTORS COULD BE INOPERATIVE. THE SEAT BELT RETRACTORS WILL LOCK WHEN THE BELT WEBBING IS EXTRACTED DURING A CRASH; HOWEVER, THE MECHANISM THAT LOCKS THE SEAT BELT RETRACTOR WHEN THE VEHICLE DECELERATES QUICKLY, SUCH AS HEAVY BRAKING, MAY NOT OPERATE AS INTENDED.
CERTAIN SPORT UTILITY VEHICLES HAVE WINDSHIELD WIPER SYSTEMS THAT WILL NOT TURN ON, CEASE OPERATION WHILE IN USE, FAIL TO TURN OFF/ON BY THEMSELVES (MOISTURE SENSITIVE WIPER SYSTEM), OR HAVE CONTINUOUS WINDSHIELD WASHER PUMP OPERATION BECAUSE THE PRESENCE OF WATER WITHIN THE WIPER MODULES CAN EITHER CAUSE A SHORT CIRCUIT OR CAN LEAD TO THE CORROSION OF COMPONENTS WITHIN THE MODULE.
ON CERTAIN SPORT UTILITY VEHICLES, VIBRATION AND HEAT MAY CAUSE THE TAIL LAMP/STOP LAMP BULB TO LOOSEN IN ITS SOCKET. IF THIS OCCURS, THE BULB MAY FLICKER AND EVENTUALLY BECOME INOPERATIVE.
CERTAIN SPORT UTILITY VEHICLES WERE BUILT WITH A LEFT-FRONT BRAKE PIPE WITH A CIRCUMFERENTIAL SCORE AT A RANDOM LOCATION ALONG THE LENGTH OF THE PIPE AS THE RESULT OF THE MANUFACTURING PROCESS. IF THE BRAKE PIPE PARTIALLY OR FULLY FRACTURED, BRAKE PEDAL TRAVEL WOULD IMMEDIATELY INCREASE AND FRONT BRAKE PERFORMANCE WOULD BE REDUCED.
CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARDS NO. 101, "CONTROL LOCATION, IDENTIFICATION, AND ILLUMINATION" AND NO. 208, "OCCUPANT CRASH PROTECTION." THESE VEHICLES HAVE AN INTERMITTENT CONDITION DURING VEHICLE START-UP IN WHICH THE INSTRUMENT PANEL CLUSTER MAY NOT PROPERLY POWER UP, RESULTING IN MOST OF THE DISPLAYS, TELLTALE LIGHTS, AND FUNCTIONS (EXCEPT THE SERVICE ENGINE LIGHT, TURN SIGNAL INDICATORS, AND THE INSTRUMENT PANEL CLUSTER BACKLIGHTING) BEING INOPERATIVE.
CERTAIN MINIVANS, PASSENGER AND SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 225, "CHILD RESTRAINT ANCHORAGE SYSTEM." THE OWNER'S MANUAL DOES NOT EXPLAIN THE MEANING OF THE LOCATION SYMBOLS FOR THE CHILD RESTRAINT LOWER UNIVERSAL ANCHORAGE SYSTEM.
ON CERTAIN MINI VANS, PASSENGER AND SPORT UTILITY VEHICLES, SOME OF THESE VEHICLES HAVE A DRIVER'S SIDE AIR BAG THAT MAY NOT DEPLOY AS DESIGNED. IN ADDITION, THE AIR BAG INFLATOR COULD RUPTURE.
CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 114, "THEFT PROTECTION." THESE VEHICLES ARE EQUIPPED WITH A MECHANICAL OVERRIDE THAT COULD ALLOW THE IGNITION KEY TO BE REMOVED WITH THE SHIFT LEVER IN A POSITION OTHER THAN PARK. IN ADDITION, THESE VEHICLES HAVE AN OVERRIDE THAT CAN ALLOW THE TRANSMISSION TO BE SHIFTED OUT OF PARK WITH THE IGNITION IN THE OFF POSITION.
ON CERTAIN SPORT UTILITY VEHICLES, A FUEL FILTER FITTING CAN BECOME DISCONNECTED. IF THIS WERE TO OCCUR WHILE ATTEMPTING TO START THE ENGINE, A NO-START CONDITION WOULD RESULT AND FUEL WOULD BE PUMPED OUT THE FUEL FILTER ONTO THE GROUND.
CERTAIN PASSENGER, MINI VANS, AND SPORT UTILITY VEHICLES HAVE AN AIR BAG INFLATOR ON THE DRIVER'S SIDE THAT COULD FRACTURE AT A WELD DURING A DEPLOYMENT.
CERTAIN SPORT UTILITY VEHICLES ARE MISSING WELDS ON THE REAR FLOOR PLAN.
VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES EQUIPPED WITH 4-WHEEL DRIVE. THE CALIBRATION OF THE TRANSFER CASE CONTROL MODULE COULD CAUSE INSUFFICIENT HIGH SPEED GEAR ENGAGEMENT.
VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES. UNDER CERTAIN CIRCUMSTANCES THE FRONT LOWER CONTROL ARM BRACKETS MAY FRACTURE. THIS FRACTURE COULD RESULT IN SEPARATION OF THE FRONT LOWER CONTROL ARM FROM THE FRAME.
VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES (4 WHEEL-DRIVE). SOME OF THESE VEHICLES WERE BUILT WITH A RANGE SHIFT COLLAR IN THE TRANSMISSION TRANSFER CASE THAT CONTAINS CRACKS.
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Frequently Asked Questions
What are the most common 2002-2009 Chevrolet Trailblazer problems?
The 2002-2009 Chevrolet Trailblazer has accumulated 7,931 NHTSA complaints. The most frequently reported problem areas are Electrical System, Fuel System, Exterior. As with any used vehicle, an inspection before buying and a vehicle history report are recommended.
Which Chevrolet Trailblazer engine is most reliable?
The 2002-2009 Chevrolet Trailblazer was offered with 15 engine options. Based on NHTSA complaint data, the 5.3L 8-cyl has the lowest complaint density and is considered the most reliable choice for buyers.
Is the 2002-2009 Chevrolet Trailblazer a good used car?
The 2002-2009 Chevrolet Trailblazer can be a sound used car depending on trim, mileage, and maintenance history. With 7,931 total NHTSA complaints on record, prospective buyers should review the known problem areas and check for open recalls before buying.
How many NHTSA complaints does the 2002-2009 Chevrolet Trailblazer have?
The 2002-2009 Chevrolet Trailblazer has 7,931 complaints filed with NHTSA as of our latest data pull. Complaint counts reflect owner-reported issues and do not necessarily indicate defects or safety risks on their own.
What recalls affect the 2002-2009 Chevrolet Trailblazer?
There are 26 NHTSA recalls affecting some 2002-2009 Chevrolet Trailblazer vehicles. Recall status varies by VIN — check the NHTSA recall database at recalls.nhtsa.dot.gov with your specific VIN to confirm which campaigns apply.
What should I check before buying a used Chevrolet Trailblazer?
Before buying a used Chevrolet Trailblazer, verify all open recalls are completed via the NHTSA VIN lookup tool. Pay particular attention to Electrical System, Fuel System, Exterior, which are the most commonly reported problem areas. Request maintenance records, have an independent mechanic inspect the vehicle, and run a vehicle history report to check for prior accidents or title issues.
What are the NHTSA crash test ratings for the Trailblazer?
The 2009 Chevrolet Trailblazer received an overall N/A-star safety rating from NHTSA. Frontal crash: N/A stars. Side crash: N/A stars. Rollover: 4 stars (19.1% rollover probability). Electronic Stability Control: Standard. Forward Collision Warning: No. Lane Departure Warning: No. These ratings are based on standardized crash tests conducted by the National Highway Traffic Safety Administration.
Data from NHTSA federal complaints database. 7,931 complaints analyzed. Data confidence: high. Last updated: 2026-05-23.