2024 Gmc Sierra 3500hd At4. Search from 2111 new gmc sierra 3500 cars for sale, including a 2024 gmc sierra 3500 at4, a 2024. Gmc sierra 3500 hd at4:
Gmc sierra v8 engines to get improved fuel economy. There’s still a technology plus package, but its rpo code changed from y5d to pdg.