Automatic Transmission Control Module Problems of GMC Sierra 2500

The contact owns a 2024 GMC Sierra 2500. The contact stated that while driving 60 mph, the vehicle went into limp mode. The contact stated that the vehicle then inadvertently lost motive power and was unable to accelerate above 40 mph. The vehicle returned to normal functionality, but the failure became a regular occurrence. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed failures with the transmission solenoid and transmission control module (tcm). The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA hotline for assistance. The failure mileage was 50,000.

See all problems of the 2024 GMC Sierra 2500 🔎.

First date was 04/23/2024 my truck went into limp mode with an alert reading engine and transmission control module problem. Brought it in and they reset the sensors. Shortly after the alert warning goes off again and I turn the engine off and start it back up. It cleared the alert, I brought it back in on 06/15/2024. They reset sensor and fixed a recall on tailgate. I picked up truck, drove it for 2 months and tcm warning came up and threw truck into limp mode while pulling a 2 horse trailer. It turned a 3 hr drive into a 6 hr drive. I brought back to dealer on 8/19/2024 they had it for 4 days and they notified me that this is an on going problem. It is a transmission solenoid valve stuck open and they ordered the part and told me it could be months before the part gets here due to the ongoing backorder from all the other trucks that have the same problem. I use this truck for work and leisure to pull my boat and 2 horse trailer and now I have a vehicle payment to make and no vehicle to use. I cannot use it to work or anything else because it is at the dealer for an unspecified amount of time. I have read online that this is a major problem with this truck and GMC as well as the dealerships know about this problem and they still sold it to me. There are so many complaints online about this GMC 2500 at4 truck problem that GMC should stop selling this truck.

Shifting started to make a loud clunking sound. Then the vehicle wouldn't shift out of 3rd gear. The engine check light came on and the code determined it to be a faulty transmission control module (tcm). When looking at the tcm, I also noted that the tcm was very hot and the nearby cable cover had melted. When researching the issue, it was discovered that GMC Sierra 2500 and 3500, years 2009 - 2015 were having this same issue all over the continent. Resulting in a massive back order and leaving drivers stranded. There was no warning lights or sounds before my power train froze up.

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Transmission control module I was at an intersection when the tcm malfunctioned halfway through and I lost all power to my motor. I was pulling a large trailer and cross traffic had to slam on brakes to keep from hitting me. My truck will not move faster that a few miles an hour now that it is in limp mode. I am a police officer and I had an onboard diagnostic tool that showed that there was no communication to the tcm. Stabilitrack warning lamp and check engine light are now on. It all happened at once no warning.

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Tcm has failed and no replacement available.

Tcm failed. Couldn’t find the parts required. Truck sat 700 miles away from me for four weeks. Had to have part repaired in hopes it worked. As of now I still have some issues but would not have the truck at all if I had to wait for a part.

See all problems of the 2011 GMC Sierra 2500 🔎.

Failed transmission control module (24256861). While driving in the early morning hours (darkness) taking my child to school, I was navigating through a busy intersection when the vehicle surged and then made a loud metal on metal sound, feeling as if someone had struck me from behind. At that point the power train became inoperable, stranding us and coming very close to being first, struck from behind and then from cross traffic. The vehicle was/has been inspected by a gm technician at starling Chevrolet, st cloud, FL and the tcm was found to have failed (trouble code u0101, lost communication with tcm). It has been at the dealership for going on four months awaiting the production of a replacement part(tcm). There was no prior indication that the tcm was about to fail. Upon failure, all lights on the vehicle display flashed and the indicator for the vehicle drive position was lost (p, r, n, d), no longer visible.

See all problems of the 2012 GMC Sierra 2500 🔎.

Transmission control module failure the tcm went out one day with no warning. Sitting at a red light, the light turned green, I started to go, and got about 20 feet into the intersection when suddenly it was like my truck shifted into neutral gear. Motor would rev but I couldn't move forward or backward. I was stuck in the middle of a busy intersection. My check engine light came on and the vehicle stability control light began flashing, it was as if everything in my truck was going haywire. I turned my hazards on as vehicles were whizzing by us, barely missing us. My wife and I got out and with the help of a few other drivers we attempted to push the truck out of the roadway but it was too heavy. We got back in and when I started the truck, all the lights were still on but this time it went into gear and we were able to leave the intersection under our own power. I was able to drive the vehicle to the dealership in 2nd gear. Luckily it was close. They diagnosed the vehicle. Code u-0101 lost communication with tcm was the diagnosis. Unfortunately, that part was on back order and it took 9 months to get one. Dealership replaced the part and all has been we'll since then.

Transmission control module failure; the truck at 45 mph developed a complete loss of all gauges(tach, speed, fuel, temp) and then 10-15 seconds later two loud noises followed by the vehicle coming to a rapid deceleration. This resulted in the wheels locking up and sliding sidewise. The truck rolled up on to its left two wheels and then slammed down. If this occurred at 75mph on the highway, the truck would have rolled. The truck has been at a GMC dealership since then. GMC has no date of if or when this truck can be repaired. The "tcm" is defective. It was on a city street, 45 mph zone going straight down a gentle grade.