Chevrolet Low Cab Forward 4500 2019 Series Owner's Manual page 304

Engine Drive Belt Routing
Fan Belt and Air Conditioning
Compressor Belt
See the Maintenance Schedule
0 269.
No. Name
1 Fan belt idler pulley
2 Generator
3 Vacuum pulley
4 Power steering pump pulley
5 Cooling fan pulley
6 Crank pulley
7 A/C belt
8 A/C compressor
9 Fan belt
10 Fan belt tensioner
Technical Data 303