I photographed these GMC AFKWX-353 COE (cab over engine) examples at the National Museum of Military Vehicles near Dubois, Wyoming.
GMC AFKWX-353 COE [4401768-S]
NMMV Dubois 2021
NMMV Dubois WY 2025
AFKWX-353 [559125]
Possibly the same truck repainted between my visits