Automatic Transmission Control Module Problems of Chevrolet Silverado 3500

The sudden rear wheel lock up recall that gm has released for the 2020+ silverado's with the 10-speed transmission does not go far enough. The recall simply reprograms the pcm to alert the driver 10,000 miles prior to the valve in the valve body failing, puts the vehicle into limp mode, and extended the warranty on the valve body to 15 years or 150,000 miles. Gm states there is no fix available and this is not correct. Nextgen drivetrain has developed a fix for this per their website [xxx] ). On their site they also provide videos of trucks experiencing the lock up where it seems that the vehicle downshifts to 2-nd gear at high speeds and creates a violent jolt. This is extremely troubling to me as these vehicles are meant to tow, and I am very fearful that this issue will happen while towing a long trailer while my family and I are traveling and putting them in danger of an accident. It is very concerning to me that NHTSA would allow for this type of a "fix". I am not sure if you have seen the videos of this issue happening, or know that a fix does seem to have been developed. I ask that you please reopen this investigation and revisit the way gm is handling this recall, and look into the fix that nextgen drivetrain has developed. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2020 Chevrolet Silverado 3500 🔎.

Transmission control module (tcm). Failure of this part leaves the vehicle inoperable and unable to drive. Being stranded, or in traffic can cause injury to myself or any other driver that may encounter me disabled unknown, major problem with this make and model of vehicle. Dealer inventory of the part is exhausted and trucks are sitting inoperable all over the u. S. A. No indications of a issue were displayed prior to the problem. The problem does display on dash, after the problem shows up.

See all problems of the 2011 Chevrolet Silverado 3500 🔎.

The truck started shifting hard. Had it towed home. Then towed to dealership. They diagnosed it with a faulty tcm #24256861. Then said it could be up to 18 months for the part. This is unacceptable in our opinion. Additional expenses, time missed from work, etc.

See all problems of the 2013 Chevrolet Silverado 3500 🔎.

The contact owns a 2011 Chevrolet Silverado 3500. The contact stated while driving approximately 10 mph and slowing for a traffic signal, the vehicle downshifted very hard. The contact stated that there was an audible clunking sound while the transmission was downshifting. The contact stated that at approximately 1 mph, the rear wheels locked up and the vehicle came to a sudden stop. The contact stated that the failure had recurred and was unpredictable. The contact stated that the "shift inhibited" message was displayed. The contact stated that the rough shifting occurred at various speeds while upshifting or downshifting. The contact had taken the vehicle to an independent mechanic where it was diagnosed and determined that the transmission control module (tcm) needed to be replaced. The contact was informed that the tcm module was on a national back order. The vehicle had not been repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 220,000.

General motors produces several years of vehicles with a faulty transmission control module (tcm). From 2008 thru 2015, Chevrolet and GMC 2,500 & 3,500 trucks with the 6. 6 l duramax engine and allison 1,000 transmission all used the same tcm; part number 24256861. This part has experienced a very high failure rate. During the summer of 2022, the stock of replacement parts was exhausted and gm seems to be postponing the manufacture or new parts. An estimated 5,000 vehicles are currently unusable due to the failure of this part and no new parts available.