Emission Control Problems of Chevrolet Trailblazer

The contact owns a 2021 Chevrolet blazer. The contact stated that while driving at an undisclosed speed, the contact noticed a loud, unusual sound. No warning lights were illuminated. The vehicle was taken to the dealer, where it was diagnosed with a crack between the muffler and front pipe. The contact was informed that the muffler needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA hotline and report the failure. The failure mileage was approximately 57,850.

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The contact owns a 2023 Chevrolet Trailblazer. The contact stated that upon starting the vehicle, the check engine warning light illuminated. The vehicle was taken to a local auto zone where a diagnostic scanner was used to retrieve dtc: p146d. The vehicle was then taken to an independent mechanic where the vehicle was diagnosed, and the same code was retrieved and confirmed. The contact was informed that the emissions control valve was faulty and needed to be replaced. The vehicle was not repaired. The contact referenced emission recall: a222379711; as a possible cause for the failure. The manufacturer was notified of the failure. The failure mileage was unknown.

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In March 2007 the check engine light came on and stayed on . I took vehicle to dealer to have it checked out. It turned out to be the secondary air pump either clogged, not running or something electrical with it. Ever since then all the exterior and interior lights became bright then dimmed for a few minutes when I start the vehicle. After leaving for work and stopping the vehicle to turn, and then again a few miles down the road, the headlamps started to flicker. Sometimes it flickered a few more times before I got to work , only 25 minutes from home. I have noticed the battery gauge fluctuated while this is happened. I was told that this was normal. Also, I am not sure this was related, but ever since the check engine"light problem the air conditioning system did not work properly. It didn't work on 5, but it did blow some on the other levels, and that varied too. I have had the air conditioning recharged, to no avail, it acted like there was a leak somewhere. Hopefully ,gm or someone else will find the solution before there was an electrical fire or even a case of road rage due to other drivers thinking I wa s flashing the bright lights at them.

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The consumer had the sensor code p0171 replaced on the 2004 Chevrolet Trailblazer but the check engine light still illuminates on the dashboard. The consumer also felt a loss of power and the vehicle would not accelerate properly. Bucking and hesitation was current as well. The consumer was told an oxygen sensor was needed.

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Air conditioner emits a foul smell! dealer states it is a air born bateria that they can not resolve. My choices are spray vents with lysol frequently, get monthly chemical treatments, or suffer from the bacteria that is making us ill. But of course after the warranty expires I will have to pay for the monthly chemical treatments at $100 each visit. Dealer and chevy says they can not fix.

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2001 Trailblazer cuts off when driving. After having it serviced found that mass air flow sensor needs to be replaced fuse and hose assembly.

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Air conditioner came on without turning it on. Dealer determined that the oxygen sensors and the air conditioning switch must be replaced.

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