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HOMESERVICE MANUALSCHEVROLET2019EXPRESS 2500 BASE, VAN CARGO EXTENDED, 6.0L ENG VIN GREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (K71 (LWN) - Q77G)COMPONENT CONNECTOR END VIEWSK71 TRANSMISSION CONTROL MODULE (LWN)
2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN G

K71 Transmission Control Module (LWN)

2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN GSECTION K71 Transmission Control Module (LWN)
GM3621452Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 33168232
  • Service Connector: 19329822
  • Description: 66-Way F 0.64, 2.8 Series, Sealed (BK with BK Terminal Position Assurance)
Terminal Part Information

Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool Service Terminal Tray Name Core Crimp Insulation Crimp
I 13575812 J-35616-64B (LT BU) J-38125-213 Not Available Not Available Not Available Not Available
II 13579769 J-35616-4A (PU) J-38125-11A Not Available Not Available Not Available Not Available
Pin Size Color Circuit Function Terminal Type ID Option
1 0.5 WH/D-BU 4507 Transmission Clutch H Control I -
2 0.5 D-BU 6401 Clutch B Control I -
3 0.5 GY/L-GN 6403 Clutch D Control I -
4 - 6 - - - Not Occupied - -
7 0.5 YE/L-GN 4170 Transmission Position Sensor B 9V Reference I -
8 0.5 YE/D-BU 4171 Transmission Position Sensor A 9V Reference I -
9 - 12 - - - Not Occupied - -
13 0.5 L-GN/VT 4510 Transmission Intermediate Speed Signal I -
14 0.5 GY/D-BU 6358 Output Speed Signal I -
15 0.5 L-GN/YE 6353 Input Speed Signal I -
16 - - - Not Occupied - -
17 0.5 WH 4508 Transmission Clutch G Control I -
18 0.5 BN 6400 Clutch A Control I -
19 0.5 GY 6402 Clutch C Control I -
20 0.5 YE/BN 6404 Clutch E Control I -
21 0.5 L-GN/WH 6380 TCC On/Off Solenoid A Control I -
22 0.5 YE/BN 6210 TCC On/Off Solenoid B Control I -
23 - 24 - - - Not Occupied - -
25 0.5 BK/GY 3927 IMS Mode Switch Low Reference I -
26 - 27 - - - Not Occupied - -
28 0.5 BK/BN 586 Transmission Oil Temperature Sensor Low Reference I -
29 - 32 - - - Not Occupied - -
33 0.5 L-GN/GY 6387 Transmission High Side Driver 1 Signal Driver I -
34 - - - Not Occupied - -
35 0.5 VT/BK 2139 Run/Crank Ignition 1 Voltage I -
36 - - - Not Occupied - -
37 0.5 BU 2500 High Speed GMLAN Serial Data (+) 1 I -
38 0.5 WH 2501 High Speed GMLAN Serial Data (-) 1 I -
39 - 46 - - - Not Occupied - -
47 0.5 GY/YE 4169 PRNDL S Signal I -
48 - - - Not Occupied - -
49 0.75 GY/BN 6388 Transmission High Side Driver 2 Signal I -
50 - - - Not Occupied - -
51 0.5 VT/YE 5985 Accessory Wakeup Serial Data I -
52 - - - Not Occupied - -
53 0.5 BU 2500 High Speed GMLAN Serial Data (+) 1 I -
54 0.5 WH 2501 High Speed GMLAN Serial Data (-) 1 I -
55 - 58 - - - Not Occupied - -
59 0.5 GY/WH 4168 PRNDL P Signal I -
60 0.5 WH/BK 5983 PRNDL C Signal I -
61 0.5 GY/BN 5982 PRNDL B Signal I -
62 0.5 VT/WH 5981 PRNDL A Signal I -
63 0.5 BN/WH 585 Transmission Oil Temperature Sensor Signal I -
64 - - - Not Occupied - -
65 0.75 BK/WH 1551 Signal Ground II -
66 0.75 RD/L-GN 1840 Battery Positive Voltage II -
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.