Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-14465442) - 2021 - CRC - 2/3/20
66 Vehicle Care
The vehicle may not be equipped with all of
the fuses, relays, and features shown.Fuses Usage
F1 Traction control module power
F2 Engine control module power
F3 Air conditioning clutch
F4 NOx sensors/Exhaust particulate sensors
F5 Engine control module/ Integrated chassis control
module/Water in fuel
sensor
F6 Front wipers F7 Cargo lamp/Bed lighting
F8 Engine control module miscellaneous
F9 Engine control module
F10 Engine control mod- ule-injectors
F11 Mass airflow sensor
F12 Starter
F13 Traction control module Fuses
Usage
F14 –
F15 –
F16 –
F17 Front axle actuator
F18 –
F19 –
F20 Fuel pump F21 Front blower
F22 Antilock brake system valves
F23 –
F24 Trailer F25 Transfer case electronic control
F26 Antilock brake system pump
F27 Trailer brake control module
F28 Rear window defogger
F29 –
F30 Driver heated seat Fuses
Usage
F31 –
F32 Passenger heated seat
F33 Body control module 3
F34 Integrated chassis control module
F35 –
F36 Center high-mounted stoplamp
F37 Right high-beam headlamp
F38 Left high-beam headlamp
F39 Rear differential lock actuators
F40 Front differential lock actuators/Selective catalytic
reduction power module
wake up
F41 Glow plug module
F42 –
F43 –
F44 Fuel heater F45 Selective catalytic reduction power module heater
Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-14465442) - 2021 - CRC - 2/3/20
70 Vehicle Care
FusesUsage
52 Right high-beam headlamp
53 Left low-beam headamp
54 Right low-beam headlamp
55 Wipers
56 Canister vent solenoid
58 Body control module 2
59 Body control module 1 61 Crankcase vent heater
62 O2 sensor 2/EV fan
63 –
64 Mass airflow sensor/ Canister vent/Humidity
sensor
65 Ignition coils/injectors - odd
66 Daytime running lamps 2
67 Daytime running lamps 1–uplevel
68 Auxiliary stoplamps Fuses
Usage
69 Trailer power extension 70 Upfitter stoplamps 71 Fuel heater/FlexFuel sensor
72 Body control module 6
73 Lighter/Data link connector
74 Front blower 75 Engine control module, powertrain signal 3
76 Soot sensor 77 O2 sensor 1/ECM powertrain signal 2
78 Engine control module/ Powertrain
79 Ignition coils/injectors - even
Relays Usage
15 Run/Crank
37 NOx sensors
38 Fuel pump Relays
Usage
39 Crank
40 Air conditioning 48 EV fan clutch
49 Powertrain 50 –
57 Cooling fan –low
60 Cooling fan control
Auxiliary Fuse Block
The vehicle may not be equipped with all of
the fuses, relays, and features shown.
