2021 Chevrolet Suburban Power Train

The contact owns a 2021 Chevrolet Suburban. The contact stated that while in reverse (R), the vehicle failed to reverse as intended. The contact’s wife continued driving at approximately 55 MPH, and an unknown message was displayed, and the vehicle failed to exceed 55 MPH. Additionally, the transmission was stuck in gear and failed to upshift into the next gear as designed. The vehicle was pulled over to the side of the road, and the battery was disconnected and reconnected, but the message remained displayed. The vehicle was towed to an independent mechanic, where it was determined that the transmission control valve needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 81,600.

My vehicle will not go in reverse.

My [XXX] Daughter lost the ability to put the vehicle in reverse while running errands on a Saturday. We had to push the truck out of the parking spot "backwards" in neutral in order to get the vehicle in a position to put it in "drive". She had been going in and out of shopping centers (forwards and backwards) earlier when the reverse suddenly stopped. I dropped the vehicle at a nearby auto shop in a fit of desperation (maybe 1/2 mile away). They told me they thought the transmission was shot, so I picked it up and took it to Andean Chevrolet (Dealer) in Cumming, GA. While driving it to Andean on Tuesday (2/17), the transmission went into low acceleration mode where I couldn't go into upper gears and topped-out at 3,500 rpm's max for the 13+ miles (30 min) drive. Andean confirmed on Friday (2/19) that the entire transmission is shot with metal all inside of the fluid, gears being broken, and the valve body being broken. The truck is 5.5 years old with 93K mile on it and we were just shocked. The repair for GM Reman transmission was quoted at ~$9.2K and we just finalized a call directly with GM Customer Service to see if GM would offer any discounts to the Dealer on the repairs. We are still waiting on that result while the repairs are being made. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Vehicle suddenly died and wont restart. The fuel control module was previously replaced. There was a recall for certain VINs but mine wasn't included even though I experienced the failure of the recalled part! This is extremely dangerous for the vehicle to suddenly die under way. In 2022 the fuel control module was replaced after the dangerous failure. The NHTSA recall that was for this part but excluded my vehicle is N212332040. You need to immediately include other VINs for this recall! Today I experienced the same symptoms. The car died while in gear and running and would not restart. The dealer is diagnosing the issue to determine if it is the same fuel control module. I highly suspect it is. If it isn't, there is another extremely dangerous defect with this vehicle.

Connecting rod bearing failure at 62,000 miles

Engine is skipping when in reverse.

The vehicle started rumbling/vibrating/shaking when getting up to speed and at a consistent speed. Brought to an independent service center and was old that the torque converter is failing. No warning lamps or other problems prior to rumbling/vibrating that started on 5/22/25.

While driving at normal highway speed, the vehicle speed is suddenly reduced and it feels and sounds like the transmission has shifted into low gear. The following warning light activated: Reduced Acceleration Drive with Care. The GM dealership service center stated that the transmission control valve body needed to be replaced. They indicated that this was a known issue. I believe a safety recall should be issued for this defective part.

After making a left turn on the street and picking up speed to 30mph the vehicle suddenly almost stopped and the engine raved up. It was so dramatic and unexpected that we thought the vehicle behind us was gonna hit us. Now vehicle only drives forward without shifting gears and doesn’t go reverse.

The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving at various speeds, the vehicle jerked while depressing the accelerator pedal. There was no warning light illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and the contact was informed that the VIN was not covered under NHTSA Campaign Number: 24V797000 (Power Train), which the contact linked to the failure. The contact was referred to the NHTSA Hotline to report the failure. The vehicle was not repaired. The failure mileage was approximately 75,000.

History of transmission shifting issues shortly after purchase (CPO from Dealership). Vehicle was taken to two separate dealerships, several times for this issue while still under the 100,000 mile CPO warranty. Dealerships claimed they could not replicate the issue, however problem continued. Now at 1198xx miles, the transmission failed while driving. was accelerating from stop and and the vehicle bucked, the rpms jumped, the service indicator illuminated, and when the vehicle stuck in limp mode. I spoke with one of the dealerships and explained the history and suggested my vehicle failure was exactly as described in the safety recall and they informed my VIN was not included in any recall or service campaign and the could do nothing for me. I called the GM customer service number, pled my case and was told the same thing

Rear drive shaft friction Message on the display read: Service Transmission Now Unable to Shift Soon

Has been in the dealer multiple times for very hard shifting issues. Jerks when shifting gears from stop or in lower speeds. They have tried everything and cannot figure it out. But the techs have felt it when driving as well. It has been doing it for a long time. And it’s a concern when driving, I do not feel safe.

Transmission leaked oil and the suv didn’t advice the loss of fluid. Still under repair

Drove up to a stoplight 4th car in a turn lane, came to complete stop. Some cars closed ranks a little further so i released my foot off the brake and moved up a few more feet and stopped again. The car then accelerated with brake fully depressed and wouldn't stop. I then put gear to neutral Tac was very high maybe 5000. Put car into park and then turned off the engine. Restarted car and continued on my way. Contacted Chevrolet and my dealership for a service diagnosis coming up July19,2021. No image to anyone but I have heard of this problem before a malfunction of electronics controlling the drivetrain. Can something be done before any injury or death occurs.

The lifter rods failed on my vehicle that has approximately 8,000 miles on it. The dealer said that this is a known issue and that there is a service bulletin out for it.