2020 Chevrolet Camaro SS, 2D Coupe, Standard TransFACTORY OEM SERVICE PROCEDURE

K71 Transmission Control Module (LT4)

GM3621452Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 34822-0013
  • 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 13579770 J-35616-35 (VT) J-38125-11A Not Available Not Available Not Available Not Available
II 19330179 J-35616-64B (LT BU) J-38125-215A Not Available Not Available Not Available Not Available
III Not Available No Tool Required Not Available Not Available Not Available Not Available Not Available
Pin Size Color Circuit Function Terminal Type ID Option
1 0.5 VT/WH 422 Torque Converter Clutch Solenoid Valve Control II MI4
2 0.5 GY/GN 6403 Clutch Solenoid Valve D Control II MI4
3 0.5 WH/BU 4507 Transmission Clutch H Control II MI4
4 0.5 WH 4508 Transmission Clutch G Control II MI4
5 - 6 - - - Not Occupied - -
7 0.5 YE/GN 4170 Transmission Output Shaft Speed Sensor Circuit 9V Reference II MI4
8 0.5 YE/BU 4171 Transmission Input Shaft Speed Sensor Circuit 9V Reference II MI4
9 - 10 - - - Not Occupied - -
11 -
0.5		 BK/BN
BK/BN		 586
586		 Transmission Fluid Temperature Sensor Low Reference
Transmission Fluid Temperature Sensor Low Reference		 III
II		 -
MI4
12 0.5 GN/YE 6353 Input Speed Signal II MI4
13 0.5 GN/VT 4510 Transmission Intermediate Speed Signal II MI4
14 0.5 GY/BU 6358 Output Speed Signal II MI4
15 0.5 BN/WH 6254 Transmission Input Speed Sensor Signal II MI4
16 - - - Not Occupied - -
17 0.5 GN/WH 1530 Transmission Line Pressure Control Solenoid Valve Control II MI4
18 0.5 YE/BN 6404 Clutch Solenoid Valve E Control II MI4
19 0.5 GY 6402 Clutch Solenoid Valve C Control II MI4
20 0.5 VT/ 4509 Transmission Clutch F Control II MI4
21 - - - Not Occupied - -
22 0.5 GN/BK 7819 Default Disable Solenoid Control II MI4
23 - 32 - - - Not Occupied - -
33 0.5 GN/GY 6387 Transmission High Side Driver 1 Control II MI4
34 - - - Not Occupied - -
35 0.5 VT/BK 2139 Run/Crank Ignition 1 Voltage 21 II MI4
36 - - - Not Occupied - -
37 0.5 BU 2500 High Speed GMLAN Serial Data [+] 1 II MI4
38 0.5 WH 2501 High Speed GMLAN Serial Data [-] 1 II MI4
39 - 48 - - - Not Occupied - -
49 0.5 GY/BN 6388 Transmission High Side Driver 2 Control II MI4
50 - - - Not Occupied - -
51 0.5 VT/YE 5985 Accessory Wake-Up Serial Data II MI4
52 - - - Not Occupied - -
53 0.5 BU 2500 High Speed GMLAN Serial Data [+] 1 II LT4+MI4
54 0.5 WH 2501 High Speed GMLAN Serial Data [-] 1 II LT4+MI4
55 - 62 - - - Not Occupied - -
63 0.5 BN/WH 585 Transmission Fluid Temperature Sensor Signal II MI4
64 0.5 WH/YE 5724 Ignition Mode Switch Mode Control II MI4
65 1.5 BK/WH 451 Ground 4 I MI4
66 1.5 RD/GN 1840 Secondary Fused Battery Positive Voltage 18 I MI4
Factory Service Tools

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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.

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