GMC/Chev Heavy Duty Diesel Trucks

[rhodies1]

Just received a serious recall on my 2021 GMC 3500 truck.
GM has a recall on the transmission module, it fails which is causing the rear wheels to lock up while driving.
Also the truck will go into low power mode and stay in 5 th gear.
It appears they know the problem but no parts to fix the issue at the present. They say once repaired , the warranty on this fix is 15 years or 150 k miles. They say it affects 2020 to 2022 model years currently ,, my neighbour has a2023 and his failed this week.

 

[Dahillbilly]

hopefully my 2023 Chev will be fine; fingers crossed

 

[rhodies1]

How many miles on your unit. My neighbour has 36 k miles

 

[rhodies1]

Mine has 24 k but no problem yet. Key word is yet

 

[Dahillbilly]

21k on mine

 

[2019_V22]

Looks like a software update is the first line of defense, before a possible control valve replacement.

https://www.caranddriver.com/news/a62906141/chevy-gmc-cadillac-diesel-trucks-transmission-recall/

https://www.nhtsa.gov/?nhtsaId=24V797000

 

[rhodies1]

My neighbour was advised by GM dealer that the new valve was the fix. He's waiting for part to arrive. My notice states that I will be notified when parts available.
Nothing in notice stating software update was the fix.
Ill be contacting dealer tomorrow to see what they have in place for the fix.

 

[RoadJunkie]

Apparently, the word on the street, the 2023+ are not involved in the recall because the software was already downloaded prior to shipping/sale. The problem, again apparently, develops in a very small number of transmissions and I'm unaware of ANY hardware fix at this point.

 

[rhodies1]

My neighbours is a 2023. And his just died. Dealer ordering parts for fix.