This Preliminary information communicates provides information to the technician on the use of R-99 or R-95 Renewable diesel fuel.
full bulletin at NHTSA ↗2006 Chevrolet Trailblazer fuel system problems
critical Owners of the 2006 Chevrolet Trailblazer have filed 646 NHTSA complaints about the fuel system, typically surfacing around 56,000 miles at roughly $1,200 to repair (U.S. federal records, as of August 2026). Source: NHTSA Office of Defects Investigation. See fuel system across all vehicles →
Failure mileage
Complaints
646
Recalls
0
Avg fix
$1,200
| Model year | fuel system complaints |
|---|---|
| 2005 Trailblazer | 598 |
| 2006 Trailblazer (this page) | 646 |
| 2007 Trailblazer | 250 |
| 2008 Trailblazer | 3 |
2crashes
6fires
11fatalities
When does it fail?
Of the 646 fuel system complaints filed for the 2006 Chevrolet Trailblazer, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
How fast does it fail?
Cumulative share of the 11 mileage-bearing fuel system complaints filed against the 2006 Chevrolet Trailblazer by each odometer reading. Median failure: 68,000 mi.
10% have failed by46,119 mi
Half the fleet by68,000 mi
90% have failed by89,000 mi
Curve based on owner-reported odometer mileage at the time of complaint. Reflects when owners filed, not when symptoms first appeared. Maintenance habits and driving conditions shift the curve.
What stands out
Of the 4 model years of Chevrolet Trailblazer we track for fuel system problems, this one carries the most owner complaints on file — 646.
Fuel system accounts for 48% of every owner complaint on file for this vehicle — the dominant problem area across 12 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering fuel system on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
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.
full bulletin at NHTSA ↗This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.
full bulletin at NHTSA ↗This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.
full bulletin at NHTSA ↗This Preliminary information communicates the use of Winter grade fuel during the warm months of 2020 and the potential rivability issues that it can cause. The ongoing Coronavirus (COVID-19) pandemic has caused significant reductions in driving and fuel use. Due to the surplus of winter grade fuel sitting in storage (pipelines/stations) the EPA is waiving the fuel vapor requirement. This will extend the use of winter fuel into the summer months. The drivability concerns should not be single events but should be multiple occurrences associated with hot days.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The dominant complaint is a fuel level sensor that fails between 28,000 and 80,000 miles, most commonly in the 40,000–55,000 range. The gauge reads empty immediately after filling, bounces erratically, or gets stuck on empty regardless of actual tank level. A check engine light almost always accompanies the fault. Early on, some owners report the gauge working normally again after driving 20–100 miles; over months, it stops working altogether.
Owners tracking mileage via trip odometer to avoid running out of fuel have still experienced multiple engine stalls on highways, some at 65+ mph, creating dangerous situations. One owner reported five separate stalls over 15 months; another was nearly rear-ended after a stall. The low-fuel warning chimes constantly and incorrectly, adding to driver anxiety and distraction.
Repair requires dropping the fuel tank and replacing the pump/sender assembly. Dealership quotes range from $350 to $1,500. GM issued "special coverage" letters offering 50 percent reimbursement, but with mileage caps (typically 120,000 miles) and time windows (roughly August 2015), leaving owners beyond those limits fully responsible. Multiple owners report dealers acknowledging the fault as routine—"goes bad all the time"—yet offering no recall path. One owner found GM had changed the internal wiper design on newer sensors, suggesting the original design was flawed and later improved. The part itself costs $122–$500 before labor.
Same Chevrolet Trailblazer fuel system reports on nearby years: 2005 · 2007
Failure modes owners describe
Fuel Level Sensor (Sending Unit) Malfunction
Fuel level sensor fails or reads erratically, causing the gauge to show empty when tank is full, bounce between readings, or become permanently stuck at empty. Check engine light often accompanies the fault. Problem typically emerges between 28,000–80,000 miles but can occur earlier or later.
When: 28,000–80,000 miles commonly reported; some as early as 6 months/under 10,000 miles; others at 40,000–53,000 miles (most frequent cluster)
Symptoms owners cite: Fuel gauge reads empty immediately after filling tank or stays at empty regardless of actual fuel level; Gauge bounces erratically between full and empty; Low fuel warning light stays on or chimes continuously even with full tank; Check engine light illuminates (usually triggered by fuel sensor DTC); Gauge may work intermittently (e.g., correct after driving ~20–100 miles, then fails again); Over time, gauge stops working altogether
Codes mentioned: P0461 (Fuel Level Sensor Circuit Range/Performance), Generic fuel system DTC codes (owners mention 'fuel sensor' code without specifying)
Repairs/costs cited: Fuel pump/sender assembly replacement required; part cost $122–$500; total repair $350–$1,500 depending on labor (tank must be dropped). Some owners report GM offered 50% reimbursement under 'special coverage,' but with mileage/time caps (e.g., 120,000 miles, ~August 2015 cutoff). OEM part design improved in later versions (wider/thicker wipers on resistor segments). Single sensor replacement possible but labor-intensive.
Recalls/TSBs owners mention: GM issued 'special coverage' letters offering 50% reimbursement on parts/labor with mileage and time limits (not full recall). Later denials citing high mileage or expired coverage window. Dealers commonly acknowledged the problem ('goes bad all the time') but warranty typically expired when issue surfaced. GM's position: not a safety defect requiring recall.
Unexpected Engine Stall Due to Fuel Sensor Failure
Engine stalls or loses power while driving because fuel gauge sensor failure prevents accurate fuel reading; driver unaware of low/empty tank state. Gauge may still show adequate fuel even though tank is empty, leading to sudden fuel starvation.
When: After gauge malfunction has been present for weeks to months; typically around 40,000–80,000 miles
Symptoms owners cite: Engine suddenly shuts off while driving on highway or main road; Loss of power steering and braking (engine kill = loss of power assist); Vehicle must be manually coasted to shoulder or safe zone; Gauge had shown fuel remaining at time of stall; Multiple stalls reported by same owner over months/years (up to 5 times in one owner's case)
Codes mentioned: None specific to stall; underlying fuel sensor DTC (P0461 or similar) is root cause
Repairs/costs cited: Fuel sensor replacement resolves root cause. Owners often delay repair due to cost ($800+) and drive with trip odometer tracking to prevent further stalls.
Recalls/TSBs owners mention: No recall issued. Dealers and GM have acknowledged the fuel sensor as 'known issue' but frame it as warranty-expired maintenance, not manufacturer defect. Some owners received 50% coverage offer but many rejected as insufficient given known design flaw.
Fuel Cap Warning Light and Fuel Pressure Issues
Fuel cap warning light illuminates spuriously; some owners report strong fuel smell in cabin; one owner reported melted fuel pump connector and fuel line clips not installed by manufacturer, suggesting fuel system assembly defects or quality control lapses.
When: Coincident with fuel sensor failures or independently; one case at 40,000 miles
Symptoms owners cite: Fuel cap warning light comes on even when cap is properly secured; Strong gasoline odor in cabin during/after driving (lasting 10–15 minutes); Melted connector on fuel pump assembly (observed by dealership); Fuel line retention clips absent from tank assembly (manufacturer assembly fault)
Codes mentioned: Fuel cap/pressure circuit code (not specified by owners)
Repairs/costs cited: Fuel pump assembly replacement and fuel line clip installation completed under California emissions warranty in one case. Melted connector indicates thermal overstress or wiring fault.
Recalls/TSBs owners mention: Dealership found melted connector and omitted clips during repair; GM did not issue any recall or TSB for assembly defects. One owner convinced dealership to repair under CA emissions warranty; repair completed without further manufacturer communication.
Blower Motor Resistor Overheating and Melting Connectors
Connector for blower motor controller overheats and melts, disabling HVAC fan speed settings progressively and creating a fire hazard. Not strictly fuel-system but reported in context of general electrical quality concerns on same vehicle.
When: Recurring; owner's first instance led to partial repair, second instance started after repair (April 2011, after initial December 2010 issue)
Symptoms owners cite: High-speed fan setting stops working; Progressively lower fan speeds fail; Connector melts and chars (blackened, burnt appearance); Wires leading to resistor melt together; Fan briefly works after being disturbed (e.g., opening glove box) then fails again
Repairs/costs cited: Blower motor resistor and connector replacement; owner found parts for $75 elsewhere vs. dealership charge of $365. Low annual mileage (<5,000 miles/year) does not prevent failure.
Recalls/TSBs owners mention: GM/dealership claimed no defect and no safety hazard despite melted connector evidence. Refused warranty coverage or recall consideration.
Synthesized from 646 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 13 most recent
Fuel gauge became inoperable. Does not indicate proper fuel level. Subsequently failed state safety inspection. *kb
Fuel gauge no longer works. *tr
After I filled the fuel tank in my Chevrolet trailblazer the fuel light came on and the fuel gauge read empty. Since then I have been resetting my trip meter when ever I fuel up,but my husband forgot to after filling up and ran out of fuel when he wasn't sure of how much gas the vehicle actually had. I contacted the local Chevrolet dealership after I found that the NHTSA had a defect…
The bearings on the alternator are wearing and need to be replaced, the vehicle only has 29,000 miles and according to my mechanic they should not be worn this early and should be replaced as soon as possible; this is definitely a safety issue and a faulty part that I should not have to pay to have replaced. The fuel level indicator has stopped working over 2.5 years ago. I did receive a letter…
I have a 2006 Chevrolet trailblazer ls. September 2009 is when it happened. The fuel sensor went out on my vehicle and now I have to get it repaired possibly to pass my fuel emissions inspection. I didn't have it repaired because that it was going to cost me like $400 to get it fixed. I don't have that kind of money to get it fixed but now I have to for it to pass inspection. *tr
Fuel gauge reads empty and/ or sends random levels after refueling. *tr
Fuel gauge does not work and vehicle is at times losing fuel pressure. *tr
About last january my gas gauge started acting up. I would fill my tank with gas and the gas gauge would read empty and the low fuel light would come on and the engine light came on. The gauge would bounce around and cause my low fuel light to go on and turn off. The audible advisor would ding at me 5 times everytime it hit empty. Now, today, my check engine light is on constantly and the gas…
The gas gauge on the vehicle has stopped working. I called gm and they state that there is no recall even though this a common problem on this vehicle line. Gm needs to do a full recall and not only offer to pay for half of the repairs to the vehicle for this issue. *tr
NHTSA action number: dp10001 fuel gauge not working properly. Gauge will show empty when vehicle is full; gauge will show full when the vehicle is empty. The gauge indicator started fluxing between full, empty and levels in between. Now it typically stays at empty all the time regardless of the amount of fuel. *tr
Had fuel system trouble with your 2006 Chevrolet Trailblazer?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the fuel system problem on the 2006 Chevrolet Trailblazer?
It's a serious issue. 646 complaints have been filed, including 2 reports involving a crash and 11 fatality(ies). We've classified it as critical based on NHTSA's reported outcomes.
At what mileage does the fuel system typically fail?
Across the 575 complaints that reported odometer mileage, most fuel system failures cluster between 44,000 and 74,302 miles, with the median around 56,000. A quarter of owners report trouble before 44,000; a quarter make it past 74,302. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $1,200 for fuel system repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to fuel system?
No active recalls currently cover fuel system issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2006/Chevrolet/Trailblazer.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.