Chevrolet Low Cab Forward 4500 2019 Series Owner's Manual page 236

Fuse and Relay Location Cab Exterior
Vehicle Care
Fuses Usage
1 Marker light
2 Tail main
3 PCM 1
4 PCM 2
5 PCM 3
6 Power source
7 Condenser fan
8 A/C Compressor 10A
Relays Usage
1 Starter
2 A/C Compressor
3 Condenser fan
4 Fuel pump
5 Dme lamp, rr
6 Marker lamp
7 PCM main
8
9 A/C
235
Rating
20A
20A
15A
20A
15A
15A
20A