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Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 6/18/19
254
Vehicle Care
Fuses
Usage
66
Daytime running
lamps 2
67
Daytime running
lamps 1
68
Auxiliary stoplamps
69
External power for
trailer
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
76
–
77
O2 sensor 1
78
Engine control
module, powertrain
signal 1
Fuses
Usage
79
Ignition coils/
injectors - even
Relays
Usage
15
Run/Crank
37
–
38
Fuel pump
39
Crank
40
A/C compressor
48
–
49
Powertrain
50
–
57
–
60
–
Auxiliary Fuse Block
This component is near the fuse
block in the engine compartment
Fuses
Usage
MR-1
Upfitter 1
MR-2
Upfitter 2
MR-3
Upfitter power
control
Relays
Usage
MR Rel 1
Upfitter 1
MR Rel 2
Upfitter 2