The number of recalled vehicles is unknown.
It is a Duramax engine issue and as part of the buyback, is replacing the vehicle with a 2022 model. The problem is that due to the chip supply chain issue, some of the truck features and options will be disabled.
The problem with “buybacks” is that it does not mean that they are going to cut you a check in the amount of what you paid for your vehicle. The dealership is actually offering to take your vehicle back, as a trade-in for another car. It does not work out to your benefit, especially if you owe more on your vehicle than it is worth. The dealership will want to roll the loan negative equity into your new car loan. Only a few states in the US such as California and Washington force the return of your down payment, all the payments you have made, and any out-of-pocket expenses.
https://gmauthority.com/blog/2022/04...quality-issue/