Pulling out to an intersection my 2021 chevy Trailboss stopped going forward. All I had was reverse. Fortunately cars stopped and no one was injured. The truck was towed to a chevy dealership and was inspected and said that the transmission went out on it. The service manager told me that the "transmissions that were put in these trucks were not good" No warning lights ever came on prior to this incident. There was a recall for transmission problems for other chevy models however I have been told that my truck does not qualify for the recall.
2021 Chevrolet Silverado 1500 transmission complaints
Page 6 of 9: complaints 131 to 160 of 245, newest first, as owners wrote them.
The truck, while driving at highway speeds on the interstate, experienced catastrophic engine failure, seizing the motor while in driving. Luckily, I was able to pull the truck to the side of the road safely, without a crash occurring. Losing engine/braking power could have been a major concern but thankfully, traffic was light enough I had space to pull to the side of the road. The truck had to be towed to the nearest dealer, where it was discovered the motor had seized. 2021 Chevrolet Silverado Trail Boss 6.2L motor with 47k miles on the factory warranty/no modifications. Since taking the truck to the dealer, they warranty-swapped a remanufactured crate motor in the truck. Hearing of the major increase in issues with this truck, I traded it in on a different manufacturer and now have a different vehicle. Aside from this huge inconvenience and safety issue, GM's customer support line failed to cover the full cost for a rental truck while my vehicle was down for a new motor (late November 2024 until mid January 2025) and I still have yet to receive a refund for my tow bill. This experience that has now lasted almost 6 months (still with no resolution) has been horrible. I hope General Motors is held liable for this major issue.
Shuddering when driving. Erratic shifting and downshifting.
this is 6.2 l l87 engine that is being recalled but this vin is not on list. already had lifters and rods replaced while back. coming home from trip truck made awful noise and I lost power on the interstate. thankfully was able to get out of traffic but waited 3.5 hours for tow. at dealer but cant tell me when they can look at it. 60,200 miles and they are saying well we will see what we can do but your powertrain warranty ended at 60k. i have had numerous problems and these are all known by gm especially 2021 6.2l.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving on several occasions at various speeds, the temperature gauge remained at hot (Hot) location, with a dinging warning notification. The check engine and "Transmission idle temperature high" messages were displayed. The vehicle was steered to the side of the road each time and turned off for approximately 45 minutes to allow the vehicle to cool down. The vehicle was taken to a dealer where it was diagnosed and determined that the transmission needed to be replaced. The vehicle was not repaired. The vehicle was then taken to an independent mechanic where it was determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 115,000.
I purchased this truck 3/20/2025. I have since realized it wasn't me doing something wrong. The truck hesitates and shakes during shifting upon acceleration from a stop and when putting it in park and attempting to turn the truck off it has a message on the display saying "shift to park" and it will not turn off until you repeatedly restart it and play woth the gear shift to get it to register that it's in park. I have made an appointment to take it to the dealership to be looked at. The truck has 75,000 miles on it.
The engine rods went bad in the engine and damaged the cam shaft. The vehicle only has 71000 miles on it. The resulting repairs cost approximately $8000. We have been told by the Chevy dealer doing the repairs and also the dealer we bought the truck from that this is a known problem and they have had several vehicles with the 5.3L engine that have needed this same repair.
While driving about 75 miles an hour, when the gear was shifting back-and-forth between about seven and eight, there was a loud bang. It happened again with a bang that was not as loud. Something with the transmission. Only have 36k miles on it.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving 35-40 MPH, the engine revved; however, the vehicle failed to respond as intended, with the transmission slipping. The message "Engine Power Reduced" was displayed. The contact was able to pull over to the side of the road. The contact was able to drive to the residence at slow speeds. The vehicle was taken to the dealer, where it was diagnosed that the automatic transmission valve needed to be replaced. The dealer replaced the transmission valve. Additionally, the dealer replaced the rear and front differentials and the transfer case. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 79,882. The VIN was not available.
Transmission would not select gear then without warning would engage. Loud thuds when changing gears. 10spd automatic.
The engine light is blinking while driving on the highway, it comes and goes, I have a video for that. Also it has a ticking noise and I’ve had the noise since I bought the truck and took it multiple times to the dealership, first it was the pump they replaced for free but the ticking never went away, I took it back and they said that all the trucks tick like that, and all that should be documented. Also while sitting still it sounds like the truck is shacking just a little. I have an appointment to which I have to pay $250 for them just to look at it. I think that my truck should be up under the new recall for the 2021 Chevy Silverado because my truck is knocking and also throwing off a blinking engine light.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle hesitated, and the rear wheel seized. The contact was able to coast to the side of the road. The vehicle was taken to Auto Zone; however, no cause for the failure was found. The vehicle was not repaired. The contact stated that on a separate occasion, while driving 15 MPH, the vehicle failed to accelerate as intended while depressing the accelerator pedal and the vehicle stalled. No warning light was illuminated. The vehicle was able to restart; however, reverse(R) was the only operational gear. The vehicle was towed to the dealer. However, the vehicle was not diagnosed or repaired. The contact stated that weeks before the failure, there was an abnormal sound coming from the engine. The manufacturer was not made aware of the failure. The failure mileage was approximately 8,000. .
8 speed transmission issues Hesitation, shifting hard, noise
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving 60 MPH, the vehicle briefly lost motive power before slamming into gear. There were no warning lights illuminated. The contact stated that on a separate occasion, while driving at an undisclosed speed, an abnormal sound was coming from the transmission. The vehicle was taken to a local dealer; however, no cause for the failure was found. After test-driving the vehicle, the dealer diagnosed that the fuel injectors had failed, and there was a misfire in cylinder #6 had, and the check engine warning light was illuminated. The fuel injectors were replaced. The dealer test drove the vehicle and the failure persisted. The dealer diagnosed the vehicle and stated that the lifter rocker arm had seized. The vehicle was not yet repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 64,000.
Transmission jerking violently while driving at low RPM 1000-1500 RPM. Occurs daily. Shudder and vibration as vehicle is slowed approaching stops. Effect and feeling is unsettling to driver and passengers. Can be recreated but is also intermittent at times. Dealer has avoided fixing as it is not 100% consistent. Asking me to drive until failure which is unsafe and could lead to accident or stranding.
The transmission either shifts hard or momentarily locks up when downshifting and then shifting back up into high at 50+ mph. Check engine light comes on, tow haul mode is not available, engine rpm's increase dramatically. Transmission will begin shifting normally after a engine stop, but check engine light stays on, and tow haul mode is not available. Cycle continues. The hard shift before the check engine light comes on and transmission upper gears are locked out is very unnerving, especially with a travel trailer behind you at 65 mph. I no longer fell safe driving the vehicle. I am requesting assistance from the dealership on this truck with less than 49000 miles. The "flash for the transmission" recall was done several thousand miles ago. It only masks the situation. This is not acceptable, nor safe.
Transmission isssues hard shifting and no shifting at times. I informed the dealership about the recall on this issue and they are saying it doesn’t fall under the recall which isn’t true because my vehicles is showing all of the symptoms under the recall #N242454440.
Transmission issues, rough shifting, hesitation and shuddering.
Transmission sometimes does not change out correctly, when I show down it shifts really hard, and and now the rear wheels are locking up which increase the likelihood of an accident
The transmission valves failed and torque converter clutch slipped causing the truck to have harsh shifting issues, acceleration issues, and wheel-lock up. I've had to replace my full transmission and receive a new torque converter clutch, reprogrammed.
The transmission on my truck failed. My truck now requires a new transmission. A repair costing over $7000. The transmission gave out while pulling into a street with my wife and child in the car. The truck would struggle to go into gear and lurch violently. The dealer was able to replicate these problems.
The transmission is the problem. The truck shudders. I took it to a mechanic, David Gessel's Auto Service 863‑401‑2860. The mechanic serviced the transmission and informed me that the transmission will need to be replaced eventually and that the torque converter is coming apart. It seems like the same issues 2019 transmissions in Chevys were having. My transmission is an automatic 8speed. The service performed fixed the problem of shuddering but now the truck is doing it again.
The automatic transmission appears to be going out. Hard shifting occurs when speeding up or slowing down along with loud thuds and jerks. No warning lamps have come on, I will be taking it to a shop to have the transmission fixed.
Vehicle feels like it's hitting a bump down the road 65 miles an hour. There is no bump it's the transmission. My truck has 80240
Engine Seized up on me while driving on the freeway. Four of the crankshaft bearings seized up and one of those four completely melted. good thing the freeway I was on was not too crowded, my dash just all of a sudden lit up saying shift to neutral to restart engine. I was able to get to the shoulder. I tried re starting the engine and nothing happened. I had it towed to Simpson Chevrolet in Irvine CA. they reported back to me and said Engine has seized and I will need a new engine, cost of $16,893. I cannot afford a new engine right now and have been left without a vehicle. GM has taken no responsibility for this failure even though all maintenance has been performed on time every time.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that during cold starts, the transmission was slipping, jerking, and banging. The failure eventually worsened and began to occur after the vehicle was driven and was warmed up. Additionally, while decelerating, the vehicle erroneously lurched forward. The vehicle was taken to the local dealer who diagnosed that the transmission valve body was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure. The failure mileage was 6,000.
Transmission Overheating and Jerking
While coming to a stop at the end of the exit ramp my vehicle bucked when trying to go from a stop into 1st gear. Eventually the truck continued in a forward motion. Then came to a stop light and once again from a stopped position by truck bucked and eventually went into gear and continued forward motion. Parked the car where it sat for 1.5 hours then went to drive the vehicle and it bucked again into 1st gear. Drove to a parking lot were we parked to get lunch. Came out started the vehicle backed out of the parking spot and drove forward to the exit of the parking lot. When trying to exit the vehicle failed to move forward. The car acted as if it was in neutral and only revving to high RPM's. Removing the fuse for the Transmission Control Ignition allowed the vehicle to move forward but only in gears 1,2,3. I brought the vehicle to GMC dealership and they recommended a fluid service to determine if metal chips are in the fluid. That service was performed and issue remained. The Dealer has recommended a complete transmission replacement. My vehicle never displayed a warning lamp or shown symptoms prior to this failure. My vehicle has a 8 speed transmission which is known to be a failing part with Chevrolet and GMC. A new transmission is costing me $7900 plus tax on a 2021 with low wear and highway use.
No check engine light, and my transmission didn't engage gear. I left vehicle off for the night, started it and it worked perfectly fine. Still, no check engine light was on.
Drove my truck home for lunch. Truck drove normal all morning with no warning lights or audible warnings. Went to leave and head back to work. Put my truck in reverse and it would not move. Still no warning lights or audible warnings. After looking online it said that this was common in the Chevrolet speed transmission. It also says the valve body was bad. They also stated that it could lock up the transmission and cause an accident. Luckily I was not driving down the road to find out. When talking with a Chevrolet dealership they told me that the parts to fix the transmission is on backorder. They also stated that the parts may not be available for months. Because the Chevrolet dealership had other Chevrolet vehicles in with the 10 speed transmission with the same issues and could not get parts because of the valve body being on backorder. They also said that the whole transmission being on backorder. This sounds like it's a common problem with Chevrolet 10 speed transmissions.
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