K20 Engine Control Module X1 (L8T)
WARNING: This page is about a different car, the 2021 GMC Sierra 3500 HD and 2021 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
 Courtesy of GENERAL MOTORS COMPANY
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Connector Part Information
- Harness Type:Engine
- OEM Connector: 34576-0303
- Service Connector: 19368142
- Description: 49 -Way F 0.64, 2.8 Series, Sealed (BK with BU Terminal Position Assurance)
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Terminal Part Information
| Terminal Type ID |
Terminated Lead |
Diagnostic Test Probe |
Terminal Removal Tool |
| I |
13587518 |
J-35616-35 (VT) |
J-38125-11A |
| II |
19351723 |
J-35616-64B (LT BU) |
J-38125-213 |
| Pin |
Size |
Color |
Circuit |
Function |
Terminal Type ID |
Option |
| 1 |
0.5 |
GN / WH |
492 |
Mass Air Flow Sensor Signal |
II |
- |
| 2 |
- |
- |
- |
Not Occupied |
- |
- |
| 3 |
0.5 |
WH |
4499 |
High Speed GMLAN Serial Data [-] 7 |
II |
- |
| 4 - 5 |
- |
- |
- |
Not Occupied |
- |
- |
| 6 |
0.5 |
WH / BU |
6311 |
Cruise/ETC/TCC Brake Signal |
II |
- |
| 7 |
0.5 |
WH |
2501 |
High Speed GMLAN Serial Data [-] 1 |
II |
- |
| 8 |
0.5 |
BN / WH |
419 |
Check Engine Indicator Control |
II |
- |
| 9 |
0.5 |
YE |
5991 |
Powertrain Relay Coil Control |
II |
- |
| 10 - 11 |
- |
- |
- |
Not Occupied |
- |
- |
| 12 |
0.5 |
BU / GY |
636 |
Ambient Air Temperature Sensor Signal |
II |
- |
| 13 |
0.5 |
BU / BN |
4498 |
High Speed GMLAN Serial Data [+] 7 |
II |
- |
| 14 |
0.5 |
WH / GN |
5380 |
Brake Position Sensor Signal |
II |
- |
| 15 |
- |
- |
- |
Not Occupied |
- |
- |
| 16 |
0.5 |
WH / GY |
1786 |
Transmission Park/Neutral Signal 1 |
II |
- |
| 17 |
0.5 |
BU |
2500 |
High Speed GMLAN Serial Data [+] 1 |
II |
- |
| 18 |
0.5 |
WH / GY |
459 |
A/C Compressor Clutch Relay Control |
II |
- |
| 19 |
- |
- |
- |
Not Occupied |
- |
- |
| 20 |
- |
YE / BN |
1427 |
Gaseous Fuel Disable Signal |
II |
- |
| 21 |
0.5 |
GN / BU |
428 |
EVAP Canister Purge Solenoid Control |
II |
- |
| 22 |
0.5 |
YE / BU |
1465 |
Secondary Fuel Pump Relay Control |
II |
- |
| 23 |
0.5 |
BK / GN |
580 |
Engine Control Sensors Low Reference 2 |
II |
- |
| 24 |
0.5 |
BK / BU |
1271 |
Accelerator Pedal Position Low Reference 1 |
II |
- |
| 25 - 27 |
- |
- |
- |
Not Occupied |
- |
- |
| 28 |
0.5 |
BN / GN |
1174 |
Oil Level Switch Signal |
II |
- |
| 29 |
- |
- |
- |
Not Occupied |
- |
- |
| 30 |
0.5 |
BK / VT |
1272 |
Accelerator Pedal Position Low Reference 2 |
II |
- |
| 31 |
- |
- |
- |
Not Occupied |
- |
- |
| 32 |
0.75 |
VT / BU |
5291 |
Powertrain Main Relay Fused Supply Voltage 2 |
II |
- |
| 33 |
0.5 |
VT / YE |
5985 |
Accessory Wake-Up Serial Data |
II |
- |
| 34 |
0.5 |
RD / BN |
440 |
Battery Positive Voltage |
II |
- |
| 35 |
- |
- |
- |
Not Occupied |
- |
- |
| 36 |
0.5 |
YE / BK |
625 |
Starter Enable Relay Control |
II |
- |
| 37 |
0.5 |
GN / GY |
465 |
Fuel Pump Primary Relay Control |
II |
- |
| 38 |
0.5 |
WH / RD |
1164 |
Accelerator Pedal Position 5V Reference 1 |
II |
- |
| 39 |
0.5 |
YE / WH |
1161 |
Accelerator Pedal Position Signal 1 |
II |
- |
| 40 |
0.5 |
YE / BN |
331 |
Oil Pressure Sensor Signal |
II |
- |
| 41 |
0.5 |
GN |
380 |
A/C Refrigerant Pressure Sensor Signal |
II |
- |
| 42 - 43 |
- |
- |
- |
Not Occupied |
- |
- |
| 44 |
0.5 |
GN / WH |
1162 |
Accelerator Pedal Position Signal 2 |
II |
- |
| 45 |
0.5 |
BN / RD |
1274 |
Accelerator Pedal Position 5V Reference 2 |
II |
- |
| 46 |
0.5 |
YE |
4063 |
Hood Status A Signal |
II |
- |
| 47 |
0.5 |
VT / GN |
439 |
Run/Crank Ignition 1 Voltage |
II |
- |
| 48 |
0.75 |
VT / BU |
5290 |
Powertrain Main Relay Fused Supply Voltage 1 |
II |
- |
| 49 |
2 |
VT / BU |
5290 |
Powertrain Main Relay Fused Supply Voltage 1 |
I |
- |