2018 Chevrolet Traverse

I am submitting this complaint regarding a complete transmission failure in my 2018 Chevrolet Traverse (VIN 1GNEVGKW7JJ279077). The vehicle's transmission stopped functioning altogether, resulting in a complete loss of propulsion. The vehicle can no longer be driven and requires repair/towing. A sudden loss of propulsion can create a serious safety hazard, particularly if the failure occurs while driving in traffic. My mechanic has informed me that they have experienced multiple transmission problems with 2018 Chevrolet Traverses and that issues involving this transmission are still being researched and addressed. I am concerned that my failure may be part of a larger, known problem involving GM's 9T65 9-speed automatic transmission. GM has previously issued technical service information concerning the 9T65 transmission and established a transmission replacement pilot program involving certain vehicles equipped with this transmission. GM also developed additional diagnostic and repair strategies based on transmissions returned through that program. These actions raise concerns regarding the reliability and premature failure of this transmission. I am concerned that a transmission capable of completely failing and causing loss of propulsion represents a potential safety defect that warrants investigation, regardless of whether the vehicle remains under the original factory warranty. I respectfully request that NHTSA investigate transmission failures involving 2018 Chevrolet Traverse vehicles equipped with the 9T65 transmission and determine whether there is a common defect or premature failure pattern. I ask NHTSA to review GM's technical service bulletins, warranty claims, field reports, customer complaints, and previous transmission replacement programs to determine whether additional corrective action or a safety recall is warranted. Vehicle: 2018 Chevrolet Traverse VIN: 1GNEVGKW7JJ279077 Component: Power Train / 9T65 Automatic Transmission Failure: Complete loss

2018 Chevy Traverse purchased from Carvana caused carbon monoxide exposure to my family in military housing. Vehicle locked itself while running in the garage (garage door open), and CO entered the home where my children were standing near the interior door. Fire dept forced entry into the vehicle and cleared the home. All family members required oxygen at the hospital; all 3 children had elevated COHb levels. Mechanic confirmed catalytic converter failure and exhaust defect. Full Description: On 6/7/26, our Traverse turned on and locked itself while running in our garage (door open) as we were preparing to leave. Exhaust was blowing toward the interior door of our military home, and CO entered the house. My children were inside near that door and became exposed. We could not unlock or shut off the vehicle. Fire dept forced entry, confirmed high CO levels, and cleared the home. At the hospital, all of us required oxygen; all 3 children had elevated COHb. A mechanic later confirmed catalytic converter failure, exhaust defect, P0171, and incomplete catalyst monitor—stating this can cause ongoing CO exposure. A Build Verification sheet found in the glove box (not disclosed at sale) showed pre‑existing issues: exhaust rattle, check engine light, and multiple mechanical reworks. Carvana refuses to assist. This vehicle is unsafe to drive or idle.

Repeated problems trying to turn off vehicle with a "Shift to Park" notification being displayed. It took numerous attempts each time of banging the shift lever and flicking the shift button for it finally properly turn off. Otherwise, it would continually alarm. While the milage is only 26500, it was beyond the 5 yr warranty. I was never notified of any recall notice concerning this well documented problem. There were several class action lawsuits about this known issue, but all have since been closed. Dealer replaced transmission control range selector harness and jumper for $500.

Vehicle was driving fine in good condition and well maintenance. No warning at all and went to drive it home from a friends and it would not go in reverse at all. Towed to dealership and they said it’s a transmission issue. There is a recall on 2018 chevy traverse vehicles. My vehicle is not showing up but I do believe this could be the issue and should be considered a recall

The vacuum pump had a catastrophic failure. This led to failure of assisted breaking, and caused brake pedal to go rock hard while driving on the roadway. Metal shards from the vacuum pump broke off, and has now entered the engine. Chevy knows this vacuum pump is flawed, but did not include my model of vehicle in the recall. Even though it uses the same part. I received a “brake assist” message on the dash about 15 seconds prior to the loss of brakes. I had my wife and two kids with me, and this jeopardized their safety. Further research on the matter states this is a known issue at GM, but for some reason my year and model were not included.