Although details have been anything but forthcoming so far, GM Authority broke news that a potentially massive buy-back program has begun at GM. The reason? An apparent hydro-lock, no-start issue associated with the newest version of the L5P Duramax has been cited. On April 21, GM began buying back the affected ’22 model Chevrolet and GMC HD trucks, and a stop-sale order has halted all ’22 sales going forward. However, replacement trucks offered to customers will be “subject to certain feature constraints due to the semiconductor chip shortage.” The availability of heated and/or ventilated seats, heated steering wheel, heated outboard rear seats, and front and rear park assist (among other things) are listed in these “constraints.”