2007 Chevrolet Trailblazer Problems

What owners report

Owners of the 2007 Chevrolet Trailblazer most often report a fuel level gauge that reads empty or jumps erratically shortly after filling up, and low-beam headlights that cut out unexpectedly while driving. Complaints also describe driver-door window switch and lock panels that stop working, sometimes with melted or smoking parts. Many of these reports come in at moderate mileage, with fuel gauge complaints tending to arrive earlier than lighting complaints.

1. 1
   Fuel system

   Fuel gauge reads wrong or empty after fill-up

   • 330 complaints (45%)
   • median 57,000 mi at 4.5 yrs old (293 state mileage)
   • 2 mention a crash, fire or injury
   • owner-quoted repair $600 (median of 35 quotes)
   • filed 2009–2020

   Owners describe a fuel gauge that drops to empty or swings between full and empty right after filling the tank, sometimes triggering the low-fuel chime and message. Some report the engine stalling or running out of gas while the gauge still showed fuel. Complaints say dealers generally diagnosed a faulty fuel level sensor or float, and several note the repair was not covered, leaving owners to track mileage manually with the trip odometer. Mostly reported between roughly 25,000 and 100,000 miles, often appearing soon after a fill-up.

   2 related service bulletins

   What to check: On a test drive, ask whether the fuel gauge behaved correctly right after the last fill-up, and try filling the tank to see if the reading settles. Budget for a fuel level sensor replacement if the gauge is erratic.

   2 excerpts from owner complaints in NHTSA records

   “Fuel gauge reads when tank is full but as fuel is used gauge will intermittently go to empty and alarm will sound. I cannot be sure how much fuel is ever in the tank. I must rely on the odometer readings to approximate the range remaining. I fear running out of gas and getting in an accident.”

   NHTSA complaint #10395874, filed 2011-04, 28,000 miles

   “The fuel gauge light went on when the vehicle still had nearly 10 gallons of gas. The fuel gauge will read full for a week and then the fuel light when come on suddenly. There have been multiple occasions when the fuel gauge read empty, but I was only able to fill up with 8 gallons (fuel tank is 20 gallons plus). Fuel gauge has been so inaccurate that I have been forced to use my trip odometer and I don't feel confident taking car on a road trip or out of town.”

   NHTSA complaint #10425766, filed 2011-09, 40,000 miles
2. 2
   Exterior lighting

   Low-beam headlights cut out while driving

   • 138 complaints (19%)
   • median 112,018 mi at 9.9 yrs old (119 state mileage)
   • 3 mention a crash, fire or injury
   • filed 2010–2024

   Complaints describe low-beam headlights going dark without warning at night, sometimes flickering first, with high beams still working. Owners report replacing bulbs, fuses, relays and switches without a lasting fix, and some say a dealer identified the headlamp driver module as the cause. Several owners reference the headlamp recall campaign and report being told their vehicle was not covered by it. Reported across a wide mileage range, from about 30,000 miles up past 200,000, usually during night driving.

   Recall 15V5190001 related service bulletin

   What to check: Check the low beams at night or in a darkened garage and ask whether the headlamp driver module or relays have been replaced. Verify by VIN whether the headlamp recall applies to this specific vehicle.

   2 excerpts from owner complaints in NHTSA records

   “My 2007 Chevrolet Trailblazer head lights go off when I'm driving down the road. They do come back on after I stop for a minute or two. I can't drive my vehicle at night because of this issue. I looked up my Trailblazer using my VIN number and it said there were no recalls on my vehicle. I've had other issues with my vehicle to. :(”

   NHTSA complaint #11114442, filed 2018-07, 164,204 miles

   “Approximately 2 years ago my dim headlights went out as I was driving at night. I thought to switch to high beams and luckily they worked on high beam thank goodness this was a road I knew well.. I have no way of knowing how often this happens during the daytime. But it occurred several times after this. I had my vehicle checked and was told it was a relay. Changed it and problem solved, until now. The issue is back, GM sent me a special coverage letter, I called the number on the letter and was directed to take it to a chev. …”

   NHTSA complaint #11000863, filed 2017-06, 140,000 miles
3. 3
   Electrical system

   Driver door window and lock switches fail or overheat

   • 140 complaints (19%)
   • median 78,000 mi at 5.9 yrs old (117 state mileage)
   • 49 mention a crash, fire or injury
   • owner-quoted repair $500 (median of 14 quotes)
   • filed 2008–2023

   Owners report driver-door window, lock and mirror controls that work intermittently, then quit entirely, sometimes letting the window drop open. Several complaints describe a burning smell, smoke and melted plastic or a melted switch module inside the door panel. Some say the dealer linked the problem to the power window switch recalls and replaced wiring or the module. Usually reported between about 45,000 and 180,000 miles, often noticed after rain or when the door panel was damp.

   Recall 15V599000Recall 14V404000Recall 13V248000Recall 12V406000

   What to check: Operate every window and lock from the driver panel, look for water stains or a burnt smell near the switch module, and ask whether any of the power window switch recalls were completed.

   2 excerpts from owner complaints in NHTSA records

   “Lowered drivers window after a minute or two smelled plastic burning saw smoke coming from control panel I ripped the panel out to see melted plastic and stronger smell of plastic burning control box is melted completely thru I pulled all but two connector plugs as the remaining two connectors are fused to the control box and can not disconnect them.”

   NHTSA complaint #10445657, filed 2012-01, 180,000 miles

   “Drivers side window and lock control panel does not work. Control panel for side mirrors does work. I cannot lock my doors from the drivers side or roll up/down any windows in my vehicle from the drivers side .. The passenger side window and lock control panel works, rear drivers side window control panel works, and rear passenger side window control panel works. I have had the fuses checked and they are all fine. …”

   NHTSA complaint #10488020, filed 2012-12, 110,000 miles

Buying note. Check the fuel gauge behavior right after a fill-up and test the low beams and driver-door window controls, since those are the most frequently reported trouble spots. Confirm by VIN which open recalls apply and whether they were completed, and expect some of these parts to need service on a vehicle of this age.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.