Chevrolet 4500 HD 2023 Manual page 339

338 Technical Data
Option Codes
RJS 4HK1
Y6Q Transmission: Automatic transmission A465ID model
6CP Rear Axle: Heavy-duty 320mm
G73 Rear Axle: Heavy-duty 292mm
There are more option codes than those
indicated above. Depending on the vehicle,
an option code may not be shown. For
detailed specifications of your vehicle, see
your dealer.
Component