IllustrationSPEEDOMETER JUST WENT HAYWIRE. READINGS ALL OVER THE PLACE REGARDLESS OF ACTUAL SPEED. SAME AS MANY OTHERS HAVE REPORTED FOR THIS VEHICLE. *LN
2005 Chevrolet Trailblazer Ext 370
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all Trailblazer Ext 370 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
100–25K
4025–50K
6550–75K
5475–100K
25100–150K
6150K+
200 reports with mileage · 37 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 101 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Fuel System, Gasoline. Review the 67 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Exterior Lighting. 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.
7 crash reports1 fire reports7 injury reports
Equipment complaints
4 reportsI HAVE HAD THE FOLLOWING PROBLEMS WITH MY 2005 CHEVY TRAILBLAZER EXT LS: 2008: FUEL SENSOR FAILURE, RUNNING BOARD FELL OFF 2009: HEAD AND TAIL LIGHTS GOING OUT FREQUENTLY, WINDOWS WOULD GET STUCK- COULD NOT GO UP OR DOWN- ALL DASH LIGHTS FLASHING, CAR STALLING OUT- NEEDED CIRCUIT BOARD REPLACED. ANTI-THEFT NON-FUNCTIONING. 2…
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I HAVE HAD THE FOLLOWING PROBLEMS WITH MY 2005 CHEVY TRAILBLAZER EXT LS: 2008: FUEL SENSOR FAILURE, RUNNING BOARD FELL OFF 2009: HEAD AND TAIL LIGHTS GOING OUT FREQUENTLY, WINDOWS WOULD GET STUCK- COULD NOT GO UP OR DOWN- ALL DASH LIGHTS FLASHING, CAR STALLING OUT- NEEDED CIRCUIT BOARD REPLACED. ANTI-THEFT NON-FUNCTIONING. 2010:WINDSHIELD WIPERS WILL NOT SHUT OFF(REPLACED DISPLAY BOARD), IDLE PULLEY NEEDS TO BE REPLACED , 4X4 RUNNING ROUGH AND MAKING A SOUND,SPEEDOMETER NON-FUNCTIONING, RADIO STOPPED WORKING,GLOVE BOX LOCK BROKE, HEAT/AC STOPPED WORKING FIRST ON BLOWERS 4& 5 THEN STOPPED COMPLETELY I HAVE NOT BEEN ABLE TO AFFORD TO FIX ALL THESE REPAIRS, AS IT EXCEEDS $2,000. CAR IS OVER WARRANTY AND WAS BROUGHT USED FROM A FORMER GM DEALER AT UNDER 50K. I CONTACTED GM IN NOVEMBER 2010 AND THEY STATED THAT THEY MY VEHICLE WAS OUT OF WARRANTY AND THEY COULD NOT ASSIST ME. GM INITIATED CONTACT IN DECEMBER OF 2010 AND TOLD ME TO GET A FULL DIAGNOSIS OF THE PROBLEMS AND STATED THAT IT WAS OK TO GO TO THE FORMER GM DEALER. I PAID OVER $100 FOR THIS DIAGNOSIS AND THEY STATED THAT MY VEHICLE WAS OUT OF WARRANTY AND THEY CANNOT PROVIDE ANY ASSISTANCE WHATSOEVER. *TR
A/C WAS BLOWING HOT AIR. TOOK CAR TO MECHANIC TO CHARGE AND REPLACE FREON AND THEY FOUND A LARGE LEAK IN THE LINE UNDER THE GAS TANK. CALLED DEALERSHIP FOR WARRANTY AND WAS TOLD IT DID NOT COVER CORROSION AND THE PART WAS ON MANUFACTURED BACKORDER FOR 3 WEEKS COSTING $1000. LOCAL MECHANIC WAS ABLE TO WELD A PIECE TO FIX LEAK. *T…
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A/C WAS BLOWING HOT AIR. TOOK CAR TO MECHANIC TO CHARGE AND REPLACE FREON AND THEY FOUND A LARGE LEAK IN THE LINE UNDER THE GAS TANK. CALLED DEALERSHIP FOR WARRANTY AND WAS TOLD IT DID NOT COVER CORROSION AND THE PART WAS ON MANUFACTURED BACKORDER FOR 3 WEEKS COSTING $1000. LOCAL MECHANIC WAS ABLE TO WELD A PIECE TO FIX LEAK. *TR
VEHICLE WAS INVOLVED IN DRIVER'S SIDE COLLISION. BOTH DOORS ON LEFT SIDE DO NOT OPERATE PROPERLY. REPLACEMENTS PARTS ARE NOT BEING MANUFACTURED. *JB
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
2PE11014 · Fuel Level Gauge System Failure
Opened Apr 25, 2011 · Closed Sep 23, 2011
Status: closed (inferred from source dates) · Fuel System, Other; Fuel System, Other:storage:fuel Gauge System
The office of defects investigations (ODI) analyzed complaint data provided by General Motors (GM) as well as complaints submitted to ODI from consumers.In total, there were 5,089 unique reports indicating an inaccurate fuel level reading while driving.General Motors stated that this condition occurs when the contacts of the fuel sensor wear prematurely.Most of the complaints indicated an empty fuel gauge reading after filling the tank.Less than 10 percent of theODI complaints involved an engine stall incident.During this investigation, GM developed a remedy procedure and issued special coverage bulletin instructing dealers to install a new design fuel level sensor.The bulletin was sent to dealers on August 10, 2011 and the owner letter mailing began on August 15, 2011.See the investigative file for copies of GM's bulletin and owner letter.This preliminary evaluation is closed.
Additional source detail variants (2)
Fuel System, Other
The office of defects investigations (ODI) analyzed complaint data provided by General Motors (GM) as well as complaints submitted to ODI from consumers.In total, there were 5,089 unique reports indicating an inaccurate fuel level reading while driving.General Motors stated that this condition occurs when the contacts of the fuel sensor wear prematurely.Most of the complaints indicated an empty fuel gauge reading after filling the tank.Less than 10 percent of theODI complaints involved an engine stall incident.During this investigation, GM developed a remedy procedure and issued special coverage bulletin instructing dealers to install a new design fuel level sensor.The bulletin was sent to dealers on August 10, 2011 and the owner letter mailing began on August 15, 2011.See the investigative file for copies of GM's bulletin and owner letter.This preliminary evaluation is closed.
Fuel System, Other:storage:fuel Gauge System
The office of defects investigations (ODI) analyzed complaint data provided by General Motors (GM) as well as complaints submitted to ODI from consumers.In total, there were 5,089 unique reports indicating an inaccurate fuel level reading while driving.General Motors stated that this condition occurs when the contacts of the fuel sensor wear prematurely.Most of the complaints indicated an empty fuel gauge reading after filling the tank.Less than 10 percent of theODI complaints involved an engine stall incident.During this investigation, GM developed a remedy procedure and issued special coverage bulletin instructing dealers to install a new design fuel level sensor.The bulletin was sent to dealers on August 10, 2011 and the owner letter mailing began on August 15, 2011.See the investigative file for copies of GM's bulletin and owner letter.This preliminary evaluation is closed.
DP10001 · Fuel Level Gauge System Failure
Opened Jan 7, 2010 · Closed May 23, 2011
Status: closed (inferred from source dates) · Fuel System, Other; Fuel System, Other:storage:fuel Gauge System
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than what is actually in the fuel tank. One complaint alleged a vehicle crash after the vehicle stalled while exiting the interstate, became disabled, and was struck from behind.Summarily, the complaints show an apparent increasing trend, with most complaints received within the past year.A Preliminary Evaluation has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.
Additional source detail variants (2)
Fuel System, Other
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than what is actually in the fuel tank. One complaint alleged a vehicle crash after the vehicle stalled while exiting the interstate, became disabled, and was struck from behind.Summarily, the complaints show an apparent increasing trend, with most complaints received within the past year.A Preliminary Evaluation has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.
Fuel System, Other:storage:fuel Gauge System
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than what is actually in the fuel tank. One complaint alleged a vehicle crash after the vehicle stalled while exiting the interstate, became disabled, and was struck from behind.Summarily, the complaints show an apparent increasing trend, with most complaints received within the past year.A Preliminary Evaluation has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.