2021 Chevrolet Trailblazer

When you put the vehicle in park, it does not register on the dash that the vehicle is in park so therefore you cannot turn the vehicle off. I’ve read this as well known in the 2021 trailblazers

While driving down the interstate my 2021 Chevy Trailblazer suddenly flashed "Battery Saver Mode" on the dash and shut off completely. I was able to coast to the side of the road and call for help. This was a MAJOR safety issue as my 4 year old son was riding with me and we could've caused or gotten into a serious accident. There were no previous warnings and no Check Engine Light came on prior to it shutting off--I had been having no issues. The car will not turn on and when attempting to, it makes a screeching noise. I had to get it towed to a local service center who stated my car has "catastrophic engine failure". They advised the issue could be either "timing chain or a dropped valve"--unable to confirm until they take the engine apart completely. They denied issues with the battery or starter and said the engine was completely blown. There was less than 120k miles on it and i kept up with maintenance.

2021 Chevrolet Trailblazer RS (123,000) - Coolant control Valve failure Cooling issues after 20-25 mins of driving. No Check engine lights initially just temperature gauge climbing. After 3 day of trying to drive to and from work. "Engine reduced" and P3075 code. Had it towed to dealership, in which they replaced the water pump. This DID NOT fix the issue. The next two drives (from work, and to work), I had to pull off the road several times to get the car cooled down, and run heater on full blast to drop temperature. Pulling off the road in heavy interstate traffic consistently because of the Coolant Control Valve (25207464 GM). Not to mention me, looking at the temp gauge most of the way to work, versus eyes on the road. The old thermostats would at least give you a temperature code, and not an Engine Coolant Flow Too Low error which leads to water pump being replaced erroneously. Going to plastic control valve next to a hot engine, sounds as good as plastic car jacks for this car. Oh, wait, that happened to me as well, and they recalled it after it broke on me at 2 am in the morning.

My transmission is defective and past 60,000 miles but only a little. I had a diagnosis and it needs replacing like many of these trailblazers in the ongoing lawsuit. I cannot pay for it and it should not be broken!

While driving on the highway, I heard a loud pop that made me flinch and swerve. After parking I noticed the glass in the sunroof had exploded upward like a volcano, leaving a large hole. Fortunately the shade was closed, or glass would have come into the car while I was driving.

The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while driving approximately 70 MPH, the brakes became inoperative. The message "Brake Failure - Speed Reduced to 53 MPH – Service Required" was displayed on the instrument panel. The vehicle was taken to a dealer; however, the dealer stated that the vehicle could not be diagnosed because diagnostic tests were available only by appointment. The dealer informed the contact that the computer software needed to be reset to drive the vehicle back to the residence. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and provided the contact information about a recall; however, the VIN was not under recall. The failure mileage was approximately 135,884.

I was driving an hour away from home and suddenly my muffler and exhaust started dragging— 49,000 miles, 5 years old AND just passed inspection A WEEK AGO. Luckily, it didn’t become completely unattached because that could have caused an accident as there were cars behind me. Complete safety hazard

VEHICLE WAS TAKEN TO DEALERSHIP FEB 2026 FOR TURBO/WASTEGATE REPAIR (P0299). MARCH 22, 2026, VEHICLE STALLED AND SCREEN SAID TO SHIFT TO NEUTRAL AND PUSH TO START AGAIN. CAR WOULD CRANK BUT NOT START (SOUNDS LIKE THERE IS NO COMPRESSION). HAD VEHICHLE TOWED TWO MILES TO RESIDENCE AND CONNECTED TO OBDII SCANNER, WHICH SHOWED 6 NEW CODES (P0006, P228C, P0089, P0340, P0365, P0299).

When stopped at a red light & the light turns green & I accelerate, the vehicle does not move. It makes a loud noise and jumps. This happens way too many times. There’s also an issue with the brakes, when you press on them, you can hear something grinding, which should not be happening because I bought the car brand new. Also the brakes have always been super squeaky, which is very frustrating because they should not be with a brand new car once again. The engine light goes on and off randomly and doesn’t say anything.

Shift to park message coming on, not allowing vehicle shutoff. No inspection yet, in looking up issue, was prompted to report.

Coolant control valve replacement after 5 years of purchasing the vehicle. Put at risk of over heating while driving, fan stays on after vehicle is turned off. Problem confirmed by 2 dealerships. Check engine light on for a long time, fan over working, staying on after the vehicle is off. The only warnings were the engine light coming on to get inspected and fan over running. 1st came up in December 2025 and it is now almost April 2026 costing me $1600 in repairs!! There are other Chevy models that this looks like it is being covered for but my vehicle is having this issue now and is not being covered?!?? Ever since i bought this vehicle brand new in 2021 it was labeled a lemon and have had nothing but issue after issue after issue!!

While driving at highway speeds, my vehicle suddenly enters low power/limp mode, severely reducing acceleration and creating a dangerous situation in traffic. This occurred multiple times. The dealership diagnosed the issue as a faulty gas pedal (accelerator) sensor and stated the vehicle is unsafe to drive under these conditions. The required part has been on back order for months, and no repair has been completed. The dealership promised a loaner vehicle due to safety concerns but failed to provide one and has had no communication for over four months. I am now required to travel long distances and fear loss of power will occur again while driving on the highway, posing a serious safety risk.

2021 Chevrolet Trailblazer check engine code P1467

The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while attempting to park, the vehicle failed to shift into park properly, and the message “Vehicle Not in Park” was displayed. The contact stated that several attempts were needed before the transmission was able to be shifted into park. The vehicle was taken to the dealer, where it was diagnosed and determined that the shifter gear assembly had failed and needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 40,000.

Vehicle has given me a "Shift to Park" message when the sift is all the way up and off at park. You basically has to push hard for the message to go away.

Park to shift error. Vehicle will not turn off while in park, instead gives an alert to "shift to park" even though the vehicle is already in park. Due to faulty park switch or wiring in the shifter assembly

Experiencing reduced speed, rattling noise, check engine light, power steering light on. Chevy app shows throttle control system and antilock break system error messages. Took to Chev dealership. Advised it was fuel injector (1 /4 was burned out). Had all 4 replaced ($3000). Picked up car on a Friday, vehicle was having the same issues next day Saturday. Took it back on Monday, it is now Wednesday and they’re saying it’s the turbo charger now (another $3000). Mechanic couldn’t figure out what the issue was so it took 3 days for him to now say it’s the turbo charger. I think it was the turbo charger from the get go! What’s the purpose of the diagnostics ($250)? Isn’t it to pinpointed the issue? 1st day, took him 4 hours to say it was the fuel injector. 2nd time around it took 3 days. I kept showing them and telling them it’s the throttle control system! They’re trying to rip me off! Mechanic is saying he’s been test driving it and no issues. I took a photo of my mileage before I handed them my car and it was 79,190. The mileage today says 79,191. How and where is he test driving it if it’s only been 1 mile? Reverse and forward ? They’re lying

While driving, a service warning came on that reads "Service Power Steering" - when that came on, the brakes ceased to work properly and required significant force, causing a big delay in braking. It is not safe to drive due to the limited braking. This mirrors the recall situation for other 2021 Trailblazer models with the interrupted brake sensor.

multiple times of getting the warning that i need to "shift into park" when the vehicle is in park. i did have fixed at my local dealer but did have to pay, I know this is been an ongoing issue with many trailblazer . Chevy should look into recalling the failing part.

The contact owns a 2021 Chevrolet Trailblazer. The contact stated that after reversing, the transmission was shifted to drive (D), but the vehicle failed to immediately recognize the selected gear. The check engine warning later illuminated. The vehicle was taken to an independent mechanic, who determined that the under boost, transmission control module, and transmission control solenoid had failed, and there was a loss of communication with the radio and loss of communication with the telematic control module. The mechanic advised the contact to take the vehicle to the dealer for assistance. The vehicle was not repaired. The manufacturer was made aware of the failure and advised the contact to report the failure to the NHTSA Hotline. The failure mileage was approximately 42,000.