GMC Chevrolet Silverado 2500HD 2021 Owner's Manual page 334

The vehicle may not be equipped with all of
the fuses, relays, and features shown.
Fuses Usage
F1 Rear heated seats left/right
Fuses Usage
F3
F4
F5 Spare/MFEG
F6 Heated and ventilated
seats left/right
F8
F9 Passive entry passive start/
Spare
F10
F11
F12 Passenger power seat
F13 Export power take off/
Special equipment option 1
F14
F15
F16 AMP
F17
F18
F20 Endgate
F22 Rear sliding window
F23
Vehicle Care
Fuses Usage
F24
F25
F26
F27
Circuit Usage
Breakers
CB1
Relays Usage
K1 Rear sliding window open
K2 Rear sliding window close
K3 MFEG major 1
K4 MFEG minor 1
K5 MFEG minor 2
K6 MFEG major 2
K7
K8
333