GM has issued an extensive recall that includes the 2020 through 2022 Chevy Silverado pickup truck as well as the 2021 Chevy Tahoe and 2021 Chevy Suburban SUVs and a range of other models, for units that have defective transmission control module software that can increase the risk of a crash.
Notably, all affected units covered by GM Safety Recall number N242454440 are equipped with Duramax diesel engines. Vehicles from the same nameplates and model years that are equipped with gasoline engines use a different transmission and are not affected.
The problem:Â affected diesel-motivated Chevy Silverado, Chevy Tahoe and Chevy Suburban units are subject to a condition in which the transmission control module software is unable to detect problems with the pressure in the transmission, causing the control valve to fail.
The hazards:Â the specific cause of failure is that the transmission control valve may wear improperly over time. The valve will gradually lose pressure, making shifting harsher. Eventually, this will lead to failure of the valve. Factory transmission control valve software is unable to detect the decreasing valve pressure.
If the transmission control valve of affected Chevy Silverado, Tahoe or Suburban vehicles fails, the rear wheels may lock up while the truck or SUV is in motion. Depending on the situation, this rear-wheel lockup – which is only momentary – can increase the risk of a crash or other accident.
This failure and rear-wheel lockup occurs specifically when the automatic transmission downshifts from eighth gear.
The fix:Â dealerships are instructed to install new transmission control module software. Notably, the new software is capable of detecting excess valve wear 10,000 miles prior to rear-wheel lockup.
Once valve wear is detected, the software will prevent the transmission from shifting above fifth gear, ensuring the eighth-gear lockup cannot occur. The instrument panel will also correctly display “reduced propulsion” and “service engine” warnings at that time. GM will release a special coverage program to repair transmissions affected by a defective control valve, as detected by the newly installed software. However, at the time of this writing, no parts are available for the transmission fix.
Also effective immediately is a stop-delivery order on all affected Chevy Silverado, Suburban, and Tahoe units. Any such units that are Certified Used by The General are immediately decertified as well and are removed from the GM Certified Pre-Owned (CPO) program.
Affected components: transmission control module software.
Affected vehicles:Â
- 2020 Chevy Silverado 1500
- 2021 Chevy Silverado 1500
- 2022 Chevy Silverado 1500
- 2020 Chevy Silverado HD
- 2021 Chevy Silverado HD
- 2021 Chevy Suburban
- 2021 Chevy Tahoe
- 2020 GMC Sierra 1500
- 2021 GMC Sierra 1500
- 2022 GMC Sierra 1500
- 2020 GMC Sierra HD
- 2021 GMC Sierra HD
- 2021 GMC Yukon
- 2021 GMC Yukon XL
- 2021 Cadillac Escalade
- 2021 Cadillac Escalade ESV
Number of affected vehicles:Â the Chevy Silverado pickup truck has the largest population of affected vehicles in the recall, with 66,897 Chevy Silverado 1500 and 166,541 Chevy Silverado HD trucks involved. The number of Chevy Suburban units being recalled is 2,525, while 3,858 Chevy Tahoe SUVs are also included.
In total, 461,839 vehicles across the Chevrolet, GMC, and Cadillac brands are affected by the problem and subject to the recall in the United States. Another 52,220 units are involved in Canada as well.
Owners should:Â wait for GM notification letters, which are expected to be mailed on or near Monday, December 9th, 2024 to all owners of record for affected Chevy Silverado, Tahoe, and Suburban vehicles. These letters should contain instructions for further actions to deal with the recall. Recipients should read the letters carefully for special information related to the matter.
Inspection and repair of the involved vehicles will be carried out free of charge to the owner by GM service departments. Furthermore, courtesy transportation may be available to owners of affected vehicles until the fix is applied, provided that the vehicle in question is still in warranty for the particular issue involved.
Owners with further questions about the recall and related issues can contact Chevrolet customer service at the following toll-free telephone number, citing the recall number as necessary:
Contacts:
- GM recall number: N242454440
- Chevy Customer Service:Â 1-800-222-1020
Comments
This wouldn’t have happened if the pick up EVs were released.
You’re obviously a product DNC brainwashing, thank God President Trump as back in charge!!
I believe that Rick’s comment was sarcastic. He must be the guy with the “Drill baby drill” slogan.
yea, instead we would have more vehicle fires.
Translation:
“We showed our excellence in designing transmissions (again) and will update the software to make sure that you are forced into service, hopefully after the factory powertrain warranty expires.”
Exactly !! they want the warranty to expire so they do not have to pay to fix it. How is this “fix” legal?
Seems to me the reprogramming of the valve body is a band aid! I for one would not like to be a owner( I have a 21 with the 3.0 ) and be 300 miles away from home and have my truck go into limp mode – why not just fix the issue
why not just REPLACE the transmission……this fix is pushing the problem past the warranty period……just not right
10-4. This is a underhanded “fix” and someone needs to sue GM once again.
So software is going to fix a mechanical problem, seriously gm. Just more proof u could care less about your customers. The 8 spd has been junk since 2015 through 2022 and now u have new problem in the 8 spd and once again u won’t do anything to fix a mechanical issue. Just get it through the warranty right. Bs
Why is this not covering 2023’s?? They have the same issue!