Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-14465442) - 2021 - CRC - 2/3/20
Vehicle Care 69
The vehicle may not be equipped with all of
the fuses, relays, and features shown.Fuses Usage
1 Antilock brake system motor
2 Antilock brake system module
3 Right trailer stoplamp/ Turnlamp
4 –
5 –
6 Fuel system control module/Ignition
7 Body control module 5
8 Body control module 7
9 Body control module 4
10 Instrument cluster 11 Trailer wiring
12 –
13 Display/Mirrors/Rear vision camera
14 Washer
16 Horn Fuses Usage
17 Transmission
18 Air conditioning
19 Engine control module battery
20 Left stop/turn cutaway lamp
21 Left stop/turn trailer lamp
22 Right stop/turn cutaway lamp
23 NOx sensors
24 Diesel fuel pump 25 Auxiliary power outlet
26 Body control module 3 27 Special equipment option
28 Airbag
29 Steering wheel sensor
30 Engine control module/ Glow plug module/
Ignition Fuses Usage
31 Transmission control module/Ignition
32 Transmission control module battery
33 Obstacle detection
34 NOx sensors 35 Fuel operated heater module
36 Fuel system control module battery
41 Transmission control module 2, battery
signal
42 Trailer wiring
43 EV fan clutch
44 Starter solenoid 45 Engine control module, powertrain signal 1
46 DC-AC inverter 47 Cooling fan –low
51 Left high-beam headlamp
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.
