Electrical Component and Inline Harness Connector End Views
7-175
K20 Engine Control Module X3 (cont'd)
Pin
Size
Color
Circuit
Function
Terminal
Type ID
Option
23 - 24
—
—
—
Not Occupied
—
—
25
0.5
WH/L-GN
6142
Power Take-Off Engine Shutdown Signal
I
—
26 - 27
—
—
—
Not Occupied
—
—
28
0.5
WH/RD
3201
Throttle Inlet Absolute Pressure Sensor 5V
Reference
I
—
29
0.5
BN/L-GN
5266
Barometric Pressure Sensor Signal
I
—
30 - 31
—
—
—
Not Occupied
—
—
32
0.5
L-GN
3683
Charge Air Cooler Inlet Temperature Sensor
Signal
I
—
33
0.5
BN
3681
Charge Air Cooler Outlet Temperature Sensor
Signal
I
—
34
0.5
YE/L-GN
3236
Exhaust Gas Recirculation Temperature Sensor
2 Signal
I
—
35
0.5
WH/BN
3237
Exhaust Gas Recirculation Temperature Sensor
Signal
I
—
36
0.5
D-BU/GY
3660
Exhaust Gas Temperature Sensor 5 Signal
I
—
37
0.5
VT/BN
3658
Exhaust Gas Temperature Sensor 4 Signal
I
—
38
0.5
GY/L-GN
5378
Exhaust Gas Temperature Sensor 3 Signal
I
—
39
0.5
D-BU/
L-GN
5377
Exhaust Gas Temperature Sensor 2 Signal
I
—
40
0.5
D-BU/WH
5277
Exhaust Gas Temperature Sensor 1 Signal
I
—
41 - 64
—
—
—
Not Occupied
—
—
65
0.5
BK/BN
6141
Cooling Fan Speed Sensor Low Reference
I
—
66
0.5
D-BU/VT
2364
Cooling Fan Speed Signal
I
—
67
0.5
GY/RD
2365
Cooling Fan Speed Sensor 5V Reference
I
—
68
0.5
GY/BK
3096
Digital Output Speed Sensor 5V Reference
I
—
69
0.5
L-GN
3098
Output Speed Signal
I
—
70
0.5
WH/BK
3097
Digital Output Speed Sensor 5V Reference
I
—
71 - 75
—
—
—
Not Occupied
—
—
76
0.5
BK/YE
6055
Exhaust Pressure Sensor 1 Low Reference
I
—
77
0.5
D-BU
6053
Exhaust Pressure Sensor 1 Signal
I
—
78
0.5
WH/RD
6054
Exhaust Pressure Sensor 1 5V Reference
I
—
79 - 80
—
—
—
Not Occupied
—
—
2021 - Silverado 4500HD, 5500HD, and 6500HD Electrical Body Builder Manual