10/4/23, 11:21 AM Document ID: 6108327
2023 GMC Sierra 1500 - 4WD (3GTNU9ED9PG276788)| Sierra 1500 Service Manual 16266655 |
Document ID: 6108327
K20 Engine Control Module X1 (L84/L87)
21 48
11 49
1 10
Click Image For Video
Connector Part Information
Harness Type: Engine Wiring Harness
OEM Connector: 34576-0303
Service Connector: 19368142
Description: 49-Way F 0.64, 2.8 Series, Sealed( BK with BU Terminal Position
Assurance)
Terminal Part Information
Terminal Diagnostic Test Terminal Removal
Terminated Lead
Type ID Probe Tool
I 13587518 J-35616-35 (VT) J-38125-11A
II 19351723 J-35616-64B (L-BU) J-38125-213
K20 Engine Control Module X1 (L84/L87)
Terminal
Pin Size Color Circuit Function Type Option
ID
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10/4/23, 11:21 AM Document ID: 6108327
Terminal
Pin Size Color Circuit Function Type Option
ID
GN /
1 0.5 492 Mass Air Flow Sensor Signal II —
WH
2 — — — Not Occupied — —
BU / Private Serial Data Powertrain
3 0.5 4054 II —
GY CAN Bus [-] Serial Data
4 — — — Not Occupied — —
AUTOSAR CAN Bus [-] 3 Serial
5 0.5 WH 4976 II —
Data
WH /
6 0.5 6311 Cruise/ETC/TCC Brake Signal II —
BU
AUTOSAR CAN Bus [-] 2 Serial
7 0.5 WH 4978 II —
Data
8 — — — Not Occupied — —
9 0.5 YE 5991 Powertrain Relay Coil Control II —
10 — — — Not Occupied — —
11 0.5 YE 4063 Hood Status A Signal II —
BU / Ambient Air Temperature Sensor
12 0.5 636 II —
GY Signal
Private Serial Data Powertrain
13 0.5 WH 4055 II —
CAN Bus [+] Serial Data
WH /
14 0.5 5380 Brake Position Sensor Signal II —
GN
BU / AUTOSAR CAN Bus [+] 3 Serial
15 0.5 4977 II —
BK Data
16 — — — Not Occupied — —
BU / AUTOSAR CAN Bus [+] 2 Serial
17 0.5 4979 II —
YE Data
WH / Air Conditioning Compressor
18 0.5 459 II —
GY Clutch Relay Control
19 -
— — — Not Occupied — —
20
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10/4/23, 11:21 AM Document ID: 6108327
Terminal
Pin Size Color Circuit Function Type Option
ID
GN / EVAP Canister Purge Solenoid
21 0.5 428 II —
BU Control
22 — — — Not Occupied — —
BK / Engine Control Sensors Low
23 0.5 580 II —
GN Reference 2
BK / Accelerator Pedal Position Low
24 0.5 1271 II —
BU Reference 1
25 -
— — — Not Occupied — —
26
GN / Transmission Internal Mode
27 0.5 3337 II —
YE Switch Mode Control Y
BN /
28 0.5 1174 Oil Level Switch Signal II —
GN
29 — — — Not Occupied — —
BK / Accelerator Pedal Position Low
30 0.5 1272 II —
VT Reference 2
31 — — — Not Occupied — —
VT / Powertrain Main Relay Fused
32 0.75 5291 II —
BU Supply Voltage 2
33 — — — Not Occupied — —
RD /
34 0.5 440 Battery Positive Voltage II —
BN
35 — — — Not Occupied — —
YE /
36 0.5 625 Starter Enable Relay Control II —
BK
GN /
37 0.5 465 Fuel Pump Primary Relay Control II —
GY
WH / Accelerator Pedal Position 5V
38 0.5 1164 II —
RD Reference 1
YE / Accelerator Pedal Position Signal
39 0.5 1161 II —
WH 1
YE /
40 0.5 331 Oil Pressure Sensor Signal II —
BN
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10/4/23, 11:21 AM Document ID: 6108327
Terminal
Pin Size Color Circuit Function Type Option
ID
Air Conditioning Refrigerant
41 0.5 GN 380 II —
Pressure Sensor Signal
42 -
— — — Not Occupied — —
43
GN / Accelerator Pedal Position Signal
44 0.5 1162 II —
WH 2
BN / Accelerator Pedal Position 5V
45 0.5 1274 II —
RD Reference 2
46 — — — Not Occupied — —
VT /
47 0.5 439 Run/Crank Ignition 1 Voltage II —
GN
VT / Powertrain Main Relay Fused
48 0.75 5291 II —
BU Supply Voltage 2
VT / Powertrain Main Relay Fused
49 2 5290 I —
BU Supply Voltage 1
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