Duramax Diesel. Manual - part 29

Vehicle Care

115

Relays

Usage

K12

Fuel heater

K13

Selective catalytic
reduction power
module heater
control

K14

Trailer parking
lamps

K15

Run/Crank

K16

Cooling fan clutch

K17

Rear window
defogger/Mirror
defogger

116

Vehicle Care

4-Cylinder Van

Vehicle Care

117

The vehicle may not be equipped
with all of the fuses, relays, and
features shown.

Fuses

Usage

1

ABS motor

2

ABS module

3

Right trailer
stoplamp/Turnlamp

4

–

5

–

6

Fuel system control
module/Ignition

7

Body control
module 5

Fuses

Usage

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

17

Transmission

18

A/C

19

Engine control
module battery

20

Cutaway/Left
stoplamp/Turnlamp

21

Left trailer
stoplamp/Turnlamp

22

Cutaway/Right
stoplamp/Turnlamp

23

NOx sensors

Fuses

Usage

24

Gas fuel pump/
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

31

Transmission
control module/
Ignition

32

Transmission
control module
battery

33

Obstacle detection

34

NOx sensors

35

Fuel operated
heater module

118

Vehicle Care

Fuses

Usage

36

Fuel system control
module battery

37

NOx sensors relay

41

T87A Transmission
control module
battery

42

Trailer wiring

43

EV fan clutch

44

Starter solenoid

45

Engine control
module/Powertrain

46

AC DC inverter

47

Cooling fan–low

50

–

51

Left high-beam
headlamp

52

RIght high-beam
headlamp

53

Left low-beam
headamp

54

Right low-beam
headlamp

55

Wipers

Fuses

Usage

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/
Injectors–odd

66

Daytime running
lamps 2

67

Daytime running
lamps 1–uplevel

68

Auxiliary stoplamps

69

Trailer power
extension

Fuses

Usage

70

Upfitter stoplamps

71

Fuel heater/Flex
fuel sensor

72

Body control
module 6

73

Lighter/Data link
connector

74

Front blower

75

Fuel Injectors

76

Soot sensor

77

O2 sensor 1/
Cluster

78

Engine control
module/Powertrain

79

Ignition/
Injectors–even

MR-1

Fuel filter heater

MR-2

Diesel exhaust fluid
power

MR-3

Diesel exhaust fluid
wake up