Electrical System Problems of Chevrolet Trailblazer - part 1

Dear chevy, I am reaching out to you again because I am desperately requesting immediate assistance with my vehicle, which has now become an extremely serious and dangerous safety concern. On Friday, [xxx], I had my vehicle towed to the dealership because of the ongoing mechanical issues I have been experiencing. I was advised that the repairs would cost $877, which included a battery replacement and new sensors. I paid for these repairs and picked up my vehicle on Wednesday, September 2, 2026, believing that the issues had finally been addressed. Unfortunately, within approximately one hour of leaving the dealership, my check engine light came back on. When I arrived home, the key became stuck in the ignition. I immediately contacted the dealership and requested to speak with a service manager. I made this request approximately five separate times, yet I was unable to speak with a service manager until Friday, September 4, 2026, when I finally spoke with matt. The situation has now escalated into an extremely dangerous and potentially life-threatening safety issue. On Sunday, [xxx], while driving on the [xxx] in chicago, my vehicle completely shut off twice while I was actively driving. There were no warning sounds, no dashboard warning codes, and no indication that the vehicle was about to shut off. My vehicle suddenly lost power while I was on a busy expressway, creating an extremely dangerous situation and nearly causing a major accident/pileup. I genuinely feared for my life. A vehicle that unexpectedly shuts off while traveling at highway speeds is not something I can safely continue driving. After this occurred, I had the vehicle towed to my home. I later attempted to start it, and the vehicle did start; however, the key became stuck in the ignition again. This problem has been ongoing for over a year, and I have repeatedly and desperately asked for these issues to be properly diagnosed and repaired. I have already information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 5.

See all problems of the 2021 Chevrolet Trailblazer 🔎.

I experienced a hard stall at a red light. The auto start/stop feature was engaged. The console displayed "press brake pedal to start". I had to shift into neutral and manually restart the vehicle. I had the vehicle checked at my dealer and there were no error codes thrown and the dealer service department could not recreate the stall.

About a year ago I brought my car to the dealership because my computer blacked out which resulted in losing power steering and braking ability. I was told they hooked it up to the computer and found nothing and sent me on my way. Last week this same thing happened 5x in one day and I lost all computer function for 24 hours. The computer has since glitched and blacked out multiple times but have not lost steering or braking.

See all problems of the 2025 Chevrolet Trailblazer 🔎.

My vehicle antenna was broken off in an automatic carwash by the spinning wash system because of the length and design of the unit. This antenna becomes a projectile endangering the carwash employees as well as damaging my car or a following car.

Shifter.

My new vehicle was stuck in park the dealership replaced a control module then a gear shift assembly and now some kind of brake switch and im nervous that the vehicles is unsafe. The dealership has not been letting me know much I've had to call and they won't give me any paperwork.

When I shut off the engine, it says “shift to park” and the car will not turn off. To get it to turn off, I have to turn the car back on (usually multiple times), until it recognizes that it is in park.

See all problems of the 2022 Chevrolet Trailblazer 🔎.

The car showed an error message saying shift to park when trying to turn the car off. The car was in park and showed in park on the dashboard & shifter but the error message still said it wasn’t in park. While this error is showing it will not allow the car to shut off or lock doors. I have a little over 19k miles on this car and should not have this issue. After researching this has been a know issue with their vehicles for years and it still has not been addressed.

Component affected: power train: automatic transmission / transmission control moduledescription of safety defect:the vehicle is experiencing a severe, intermittent, and violent mechanical "garage shift" engagement lurch. This occurs specifically when shifting the gear selector from reverse to drive during a cold-start cycle. When the gear is selected, there is a distinct hydraulic delay followed by a violent mechanical slam that causes the entire vehicle to violently lurch forward. This unintended vehicle movement occurs even though the engine has naturally idled down completely below 1,000 rpm, and while the brake pedal is fully and firmly depressed to the floor. Safety hazard and consequences:this defect poses an immediate and severe safety hazard. The mechanical force of the lurch is strong enough to potentially overcome the vehicle's braking system or cause a foot-slip off the pedal, resulting in sudden, unintended vehicle movement. This creates a high risk of a low-speed collision, vehicle damage, or striking a pedestrian or property during tight parking or garage maneuvers. General motors' internal service bulletins (such as bulletin 24-na-009) indicate known issues with sticking clutch regulator valves or solenoid over-travel causing line pressure spikes in these modern transmissions, yet no safety recall has been issued to permanently address this dangerous powertrain defect.

The infotainment system which controls the radio,backup camera, onstart,and other safety components stopped working I took it to a gm certified dealership and it has just been all bad from there. Gm has horrible customer service and so does the gm certified shop in michigan city I took my truck in that I only had for 11 months because the infotainment center went of paid for two diagnostic tests they still couldn't] find the issue and now they they're changing me 1,037. 76 for a radio which they dont even know if it's going to fix the problem which if it doesn't then I have to pay more money for another diagnostic test and more parts and because I got mad and said I'm paying for a guessing game the dealership told gm that because I had some aftermarket equipment in my vehicle that that caused the issue bullshit the stuff never got plugged into anything at that point the day of my appointment with the audio shop the screen went black with no sound they're all full of shit and didn't want to take responsibility for the widely known issue with the telemedic system.

My 2021 chevy Trailblazer rs is experiencing issues with the infotainment system and the onstar module they have stopped working and I have no backup camera and this issue is a safety concern to me and anyone who rides with me I have contacted both gm and onstar and got nowhere with them after I had a diagnostic test done on 6/18/26 they recommended replacement of the whole system.

Shift to park error message when car is already in park and then difficulty getting car to turn off. This is an ongoing issue. I have seen online this is a common problem. This is a safety issue because if the car doesn't turn off the battery will go dead leaving a driver stranded. This issue began soon after the car was out of warranty.

See all problems of the 2023 Chevrolet Trailblazer 🔎.

While driving on Thursday, June 4, 2026, the vehicle experienced a sudden and complete failure of the electronic braking/power brake assist system. Simultaneously, multiple safety warnings illuminated on the dashboard display, including a persistent service wrench icon, a traction control warning light, and a lane-keep assist indicator light. Due to the loss of brake assistance, the vehicle was unsafe to operate and had to be towed/driven directly to a licensed dealership for emergency diagnosis. The dealership technicians subsequently inspected the vehicle and reported that the entire electronic braking system had suffered a total failure and is completely non-functional. Despite multiple technical service bulletins and recalls issued for similar vehicle builds regarding electronic brake boost interruptions and mechanical brake vacuum pump failures, I am being forced to pay for these critical safety repairs out of pocket. A sudden loss of braking power poses an immediate crash hazard, and I am filing this report to urge the NHTSA to investigate why this manufacturing defect is not covered under an active safety recall for this specific vehicle configuration.

Vehicle stalled and shut off while driving in moving traffic on multiple occasions, resulting in sudden loss of power steering and brake assist — a significant safety hazard. Battery failed at 32,860 miles (September 2025) with all low voltage codes. Battery replaced by dealer. Vehicle continued to exhibit stalling, no-start, and battery saver active warnings. Dealer has been unable to resolve the recurring issue across three visits (ro 510659, ro 518708, ro 523715) at Chevrolet of culver city, culver city CA. Dealer is now attributing the fault to contaminated fuel without providing lab evidence. Active gm customer care case 1-02414837. Powertrain warranty active.

When shifting to park, car alerts to “shift to park”.

Amplifier lost connection, so speakers won’t work, collision warning won’t sound, and turn signal won’t sound.

When putting the vehicle in park and turning off, a warning message will appear that states "shift to park" and initially a nudge of the gear shift would clear the message, after one week, a simple nudge does not clear the message. The vehicle will not turn off and continues to beep, you have to put vehicle in gear (d or r) move a few feet, return to p, press very firmly on the brake and press the ignition button, this may or may not clear the message and it could take a few attempts of these steps to clear.

My shift to park was broken last September 9-25, and I took it to the dealers I bought it from (the month prior, in August) and they fixed it. I was never informed what they did to fix it. I didn't have any issues with it after that up until recently. I will put my car into park, press the engine button to turn it off, and then it displays the shift to park message and beeps. The light next to my gear shift will be on "p" and my screen also says my car is in park. I have to mess with the gear shifter until it recognizes that it's parked so I can actually leave my car. I have taken it to an auto shop local to me and they had it all day and couldn't figure out what caused it. I typically am stuck in my car for over 5 minutes because of this issue. My lane departure warning worked for about 2-3 months after I purchased the car. Out of nowhere it stopped working and when I press the button to turn it on, it says it's unavailable. I've tried cleaning the sensor, turning it on when I'm not accelerating/braking, and turning it on while in cruise control and it will not work.

I am submitting this report regarding my 2021 Chevrolet Trailblazer because it has been experiencing the "shift to park" issue described in the gm bulletin 19-na-206. Even when the vehicle is shifted into park, it intermittently displays a "shift to park" message and does not recognize that the transmission is in park. This issue has been ongoing and has not resolved despite normal use of the vehicle. It is frustrating to deal with on a regular basis, and it appears to be the same condition addressed by gm in technical service bulletin 19-na-206 that is available to view on the NHTSA website. I believe the NHTSA should push general motors to issue a recall for this problem rather than relying on a technical service bulletin. The issue appears to affect many gm vehicles, and owners should not have to bear the burden of repeated repairs or diagnosis for a known defect. I respectfully request that the NHTSA investigate this issue further and require gm to provide a permanent remedy through a recall.

Shifter does not recognize its in park, from what I read this affects thousands. Why am I having to sit in my car for minutes at a time? is chevy not required to handle the fixing of that switch. What a subpar design team they have. I just had to cough up over $800 to fix rusting because of shit wheel design that doesn't protect those components. Absolutely unacceptable to have consumers not only buy a car but then not issue a recall over the switch just inside the console I guess they want to con thousands to pay for a new shifter?.

The vehicle has experienced ongoing and unresolved issues despite multiple service visits. The primary concern is excessive engine vibration. It shakes concerningly when backed into a driveway at an incline and placed in park. This occurs while the vehicle is stationary and idling. The issue has been reproduced and acknowledged by a dealership service advisor during a test drive, who stated the vibration was excessive and concerning. However, no repair was completed, and no clear diagnosis has been provided. The vehicle has also displayed repeated error messages with no confirmed cause, ongoing bluetooth connectivity issues even after system updates and resets, and a malfunctioning forward collision warning system. Prior repair attempts include replacement of the backup camera, center console, and exterior windshield trim. The windshield trim repair was incomplete, as only the middle section was replaced while the remaining components were not, resulting in a mismatched and unresolved condition. No service documentation was provided for the most recent visit despite being advised that updated findings would be sent. These issues have persisted across multiple service attempts and remain unresolved. The engine vibration and malfunctioning safety systems raise safety and reliability concerns, including the potential for reduced driver awareness and increased risk of a collision.

Rear camera stoped working. I read 2022 to 2024 had recalls on internet. Ours is 2025. Been to dealer they ordered new camera under warranty. But there on back order. They said they would call us when it came in. That’s the story.

My vehicle has 2 issues that are known but only recalled for another year. My car will say shift to park when in park and will not power off. My VIN shows no open recalls for this issue for my vehicle but there is a service bulletin for this issue with my year vehicle. The dealer will not cover the cost of repair since my VIN is not listed in the recall. Also I just had to replace the vaper cannister purge pump and vaper cannister valve and extended warrenty was offered on the purge pump and valves for 2021 Trailblazer for this known issue but not 2022. Dealerships refuse to address my concerns to assist/investigate/return phone calls to help to see how to add the 2022 Trailblazer to the recall.

My brand new two week old 2026 Chevrolet Trailblazer LS issue: auto start/stop system failure, the engine shuts off and does not restart description:? while stopped at traffic lights with the auto start/stop feature engaged, the engine shuts off as designed. However, when I release the brake pedal, the engine does not restart as it should. Instead, the vehicle displays a message stating “press brake to start,” and the vehicle behaves as if it has been completely turned off. This leaves the vehicle temporarily disabled in traffic and unable to move immediately when the light changes. I must press the brake and manually restart the vehicle, causing a delay and creating a safety concern, especially in intersections. This issue has occurred multiple times and appears to be related to a malfunction in the auto start/stop system. The failure to automatically restart the engine creates a risk of being stranded in active traffic and increases the likelihood of a collision. No warning lights or prior indications are given before the failure occurs. Concern:? this is a safety issue for me and my family because the vehicle does not respond as expected when attempting to accelerate from a stop and leaves me stuck in traffic unexpectedly. It is now in the shop for the second time, as I was able to record this continuous malfunction of my brand new 2026 Chevrolet Trailblazer. I get anxiety everytime I drive it. I feel I’m going to be rear ending or be involved in some type of crash. The vehicle is currently not safe to drive currently at the dealership for a second time. I had it towed each time, as I feared for my life and safety. Dealership could not duplicate issue. They asked me to record it and I was able to.

The onstar module has went out on my car and while researching the issue I found out that it is a very common problem with Chevrolet/gm vehicles years 2021-2025 and although Chevrolet and gm are wwll aware that there's an issue and that the onstar modules are faulty there's been no recall. Mind you the module doesn't just affect onstar features it also is connected to bluetooth microphone and remote start and now none of them work at all.

Rear back up camera. One day it started to glitch when put in reverse. I placed the car in park, gave it a moment and put it in reverse again. This was repeated in the attempt to get the back up camera to work. Next- turned the vehicle off for a moment, restarted it, put in reverse and this did not help. Also, I attempted to check for update/update and reset the infotainment system. This did not help. The backup camera, after this incident has not worked since. I bought this car brand new. Also, just to note, the car shakes dramatically when increasing certain speed during winter, due to very little snow on the tires.

My car along with multiple other cars like mine are having issues with the back up camera not working. I have to take it into a Chevrolet dealer to get it replaced. It is a huge safety concern and a recall needs to be issued.

The incident involved a 2025 Chevrolet Trailblazer, purchased new in late February 2025. The failure appears related to the vehicle’s electrical/charging system and associated control modules, resulting in a sudden loss of critical safety systems. The vehicle was towed by gm roadside assistance and is currently at an authorized Chevrolet dealership, where it is available for inspection upon request. While driving in cambria, new york, the dashboard illuminated with multiple warning indicators and the vehicle experienced a complete loss of power steering and braking. The brake pedal traveled fully to the floor with no resistance and no braking effect. Steering effort increased dramatically. The driver was only able to avoid a crash due to favorable road and traffic conditions and was able to coast to a stop and pull off the roadway. This failure posed an immediate and serious risk of injury or death to the driver and others. The problem had occurred previously in the form of repeated warning messages. Beginning within the first week of ownership, the vehicle displayed “service the charge system vehicle may stall” warnings and since then has appeared hundreds of times. The vehicle was previously towed to an authorized Chevrolet dealership, where we were informed that general motors identified the issue as a known software-related problem and advised that the vehicle could continue to be driven while awaiting a future update. The catastrophic failure occurred after this guidance. The vehicle has been inspected by an authorized Chevrolet dealership both prior to and following this incident, and general motors has been involved through dealership communication. No police or insurance inspection has occurred, as no collision resulted. Based on the repeated warnings, dealer statements, and nature of the failure, the best assessment is an electrical or software-related malfunction, though the precise root cause remains unknown and requires investigation.

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.

Screen in car goes black. No radio,no noise,no back up camera-apple car play won’t hook up anymore-I see others models around mine having exactly the same issues I am experiencing-I have reset radio/screen multiple times,it works anywhere from a few mins to hours then it blacks out again and there is nothing on screen. I have replaced the battery,key fine battery’s,and fuse. And I am still experiencing this issues. I have made an appointment at a chevy dealer to have it diagnosed March 2,2026. That is $169. 00 out of my pocket. Again I am seeing plenty of other checks around my make and model having the same issues being recalled. My incident started about January 30,2026.

When parking and trying to shutoff vehicle a warning stating that the car needs to be shifted into park needs to be performed even though it is already properly in the parked position. The car cannot be shutoff and remains running until several actions of shifting the car in and out of the park position.

The vehicle intermittently warns about a power steering issue with no other indications to the problem. There are no physical issues detected while driving. The error displays at random times and will reset intermittently. This started occurring at the same time the car constantly indicates that it is not in park when trying to shutoff the vehicle even though it is clearly shifted into park.

Shift to park message when car is in park - cannot turn off vehicle until message goes away. Car can roll if message is not off. Brakes: intense squeaking.

Rear camera stopped working.

The vehicle displayed a warning on the dash that the battery was not charging properly and vehicle may stall. The vehicle was checked at dealership and issue was disregarded. 3 days later the vehicle showed the same warning and the battery light flickered, there was a chane in the power and lights dimmed. This was evaluated by dealership, apparently it is a known issue but no resolution available. When the battery light flashed during the second event there was no control over the vehicle (power/steering) creating a very concerning safety issue.