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Chevrolet Trailblazer EXT 370 check engine light comes on

21 of the 288 owner complaints about the Chevrolet Trailblazer EXT 370 describe check engine light, most of them for the 2005 model year.

owner complaints
21
worst model year
2005
typical mileage
81,000
Is there a fix? No recall or service bulletin covers this area of the car yet.

By model year

  • 2006
    3
  • 2005
    15
  • 2004
    2
  • 2003
    1

Often reported together

Fuel gauge 10Stalling 3Headlights 3

What owners say

Filed Dec 29, 2019 · Engine, Fuel system · 109,000 miles · IN

Stop it starts jerking and check engine light flashs head went bad at 109 thosand miles

Filed Jun 8, 2018 · Electrical, Lights · 81,000 miles · VA

I have 2005 chevrolet trailblazer 4wd ext ls 4.2 liter. I noticed over past 3 years that I be at drive through for burgers and etc. The car would cut off. I did not think much of it at the time. It has gotten critically worse. It would cut off in middle of the highway, drive throughs and etc. During the past two years I have re the luster and over head dome light flicker. Head lights very dim on driving also I have replaced on this vehicle the fuel throttle and sensor, a crank sensor a cam sensor, a temp sensor 4 power steering pumps new the power steering rack and assembly wheel hubs and bearings, all new coils spark plugs, belt idle pulley power steering pulley change oil every 3,000 miles air filter change battery, updated soft ware, flush fuel system, service the air condition replaced rear shocks, gm relaced pulley on engine 2010 replaced the pvc hose flush radiator and brake system, rotation and alignment done every 5000 miles, replaced headlight low beam bulbs and left tail light assembly and lens, I had it to chevrolet private mechanic garage and nothing is reading wrong also notice the ECM not storing the service engine light stay a microsecond on. This highly dangerous can stal or quit and be run over on highway. I noticed on the web on cars complaint.com amany people have cmplainted this issue.chevrolet had investigated ths issue aaaaand no resolve. I felt the vehihicle may have a short r a bad alternator or starter. .vehivle was sitting at intersection I noticed it tries to stall on driving also. All records are with car.

Filed Apr 6, 2016 · Fuel system · 120,000 miles · NY

Filler neck to gas tank leaking....dangerous !! Causes the check engine light to stay on....

Filed Mar 3, 2016 · Fuel system · 153,000 miles · NY

There is a known problem with the gas tanks on these vehicles. The vapors cause the check engine light to illuminate. In nys this car will not pass the yearly inspection. Chevrolet has an extended coverage bulletin out but it only is for vehicles that have les than 150,000 miles on it or are not older than 15 years old. Whichever come first. Prior to this, their extended coverage was for 150,000 miles or 12 years. I was excluded from the first time due to age of the vehicle when I purchased it and am now excluded from the second extended coverage due to the mileage. It is absolutely ridiculous that this is not an official recall and that chevy has loopholed numerous owners out of the coverage by not increasing the mileage requirement. The national average to drive a car according to the federal safety agency is between 15,000 and 16,000 per year. According to their mileage requires a person would have had to drive this car less that 10,000 per year. This is totally unrealistic. Since this safety issue involves fuel which is highly flammable I am baffled as to why the federal safety agency is not forcing an official; recall on this vehicle or forcing chevy to take the mileage restriction/age off of the extended coverage.

Filed Sep 28, 2015 · Engine · 110,000 miles · OH

Tl* the contact owns a 2006 chevrolet trailblazer ext 370. The contact stated that the federal safety agency campaign number: 14v755000 (exterior lighting) exceeded a reasonable amount of time for repair. The dealer stated that parts were unavailable for the repair. The manufacturer was made aware of the delay and stated that the remedy was not available. The vehicle was not repaired. The contact did not experience a failure related to the recall; however, the check engine warning light illuminated. The failure mileage was 110,000.

Filed Apr 15, 2015 · Engine · NC

Driving on the highway traveling about 60. When all of a sudden my truck shut down, thought my foot had got off the peddle but was still on the gas. Put my hazards on and prayed I wasn't going to get smashed by traffic. Then my check engine light came on. And the second engine light came on. As I pull to side of road stop the car put it in park. And tried to start it and all it did was crank and not turn over like I was out of gas. Did research on conditions and it came back default ignition switch. This has just been a nightmare. Only to arrive at chevy. And look my VIN number up and said your VIN doesn't pull up any recalls? Hun you got to be kidding me right. Clearly I thought recalls from a certain yr to a ending year is supposed to be handled? I don't know what's going on but please help fix this horrible what could have been tragic situation.

Filed Mar 20, 2015 · Engine, Fuel system · 113,762 miles · LA

Tl* the contact owns a 2006 chevrolet trailblazer ext 370. While driving at various speeds and while idling, the fuel gauge fluctuated from empty to full continuously and the check engine warning indicator illuminated. The failure recurred numerous times. The vehicle was taken to a dealer. The technician diagnosed that the fuel level sensor failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 113,762. Updated 4/16/15*cn updated 9/29/2017

Filed Jul 25, 2014 · Airbags, Fuel system · 8,000 miles · OH

Passenger air bag light not working and coming on when no passage. Check engine light has been on since 2006. Seat belts in 2nd row seating don't lock. Radio broke 2006 replaced after fixed cd player will not play or eject. Air conditioner only blows out hot air after hundreds dollars to fix it. Both head lights blow out at least every 2 months they need replaced. Drivers side break light n tail light keep blowing went to auto store get more bulbs and the tail light caught on fire employees helped me and said they seen the trailblazers do it before due to water building up in it and that that's the reason the bulbs blow. Paid out 300$ in tickets cuz of them blowing n not knowing. The hot and cold air in second row don't blow out at all. A bike parked by me and my back window exploded. Windshield vision is cloudy. Gas gauge, speed ad temp gauge stopped working had replaced now battery gauge broke. Only 1, and 2 worked on heat control and 2 vents worked. Bottom of both sides of car rusted 2 years ago. I had it paid of in 3 years and wish these problems were made available before I did. I've already put thousands of dollars in it and the same thing breaks again and windows in front broke too.my blazer has bee in the garage since january cuz as soon as my husbands gets it out the shop it needs to go right back and we cant afford to fix it nomore I love my blazer and don't want him selling it or trading it in s if you have any advice that would help please tell me. I've been keeping it hoping to get it fixed again but I also have a disabled grandson and custody of a 2 year old that have apts n therapy 4 times a week and need a car but I love it and cant part with it. Please let me know if there a certain way to fix these problems I can do myself so I can keep it..thanks

Filed May 21, 2014 · Fuel system · MI

Engine light comes on was told gas sensor was defective could harm engine rec'd notification from gm to repair would only pay half of the expense after 3 months same issue gm would not pay anything.

Filed May 20, 2014 · Engine · 77,000 miles · CA

While driving my 2005 chevytrailblazer it just turned off without warning, as soon as it did the check engine light and reduced engine power light came on(instrument panel and radio were still working). I tried a few times to turn it back on but it failed to restart. 15 minutes later it restarted and I was able to drive to my workplace a few blocks away, by the time I used my vehicle again(about 3hrs later) both engine lights had turned off. We took our vehicle to an auto repair shop to see if they could diagnose the problem, they recommended that we take it to a gm dealership because there were numerous codes showing up on the diagnostic machine. We took it to a local gm dealership in indio, ca (coachella valley buick gmc). They too said that numerous codes were coming up but after 1 1/2 days with our vehicle they stated that the ignition switch needed to be replaced. We took it in to auto repair shop and he performed the repair that gmc stated was needed. Upon picking up the vehicle from the repair shop I drove home, as I was pulling into the garage it turned off, a repeat of the same issue we were having before replacing the ignition switch. Since this was on sat,05-03-2014 we had to wait until the afternoon of mon, 05/05/2014 to take it back to the dealership, we informed them that we had their recommended repair done and that the vehicle continued to turn off. The following day they informed me that they could not replicate the problem and that we could pick up the vehicle. On thurs., 05/08/2014 the vehicle turned off while making a left turn. 20 minutes later it turned back on and he drove it back to the dealership, they then had the vehicle until 05/12/2014; again they stated that they could not replicate the problem. It has continued to repeat this same problem, again without any warning or indication that there is a problem.

Related recalls

No recalls on record for this model year.

Questions about the Chevrolet Trailblazer EXT 370 check engine light

Why does the check engine light come on in the Chevrolet Trailblazer EXT 370?

Owners who report it most often also describe wrong fuel gauge reading, engine stalls while driving and headlights failing or too dim.

Which Chevrolet Trailblazer EXT 370 years have check engine light problems?

The model years with the most reports are 2005 (15 complaints), 2006 (3 complaints) and 2004 (2 complaints).

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