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HOMESERVICE MANUALSCHEVROLET2025EQUINOX RS, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (K56-M64)COMPONENT CONNECTOR END VIEWSK71 TRANSMISSION CONTROL MODULE (MRQ)
2025 Chevrolet Equinox RS, 4WD

K71 Transmission Control Module (MRQ)

2025 Chevrolet Equinox RS, 4WDSECTION K71 Transmission Control Module (MRQ)
GM3621452Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine Wiring Harness
  • OEM Connector: 12672856
  • Service Connector: 85761018
  • 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
I 13587518 J-35616-35 (VT) J-38125-11A
II 19351723 J-35616-64B (L-BU) J-38125-213
Pin Size Color Circuit Function Terminal Type ID Option
1 - 5 - - - Not Occupied - -
6 0.5 VT / GY 3139 Run/Crank Ignition 1 Voltage II MRQ
7 - - - Not Occupied - -
8 0.5 GN / YE 6353 Input Speed Signal II MRQ
9 0.5 GY / BU 6358 Output Speed Signal II MRQ
10 - - - Not Occupied - -
11 0.5 WH / BK 3705 Electronic Transmission Range Select Switch Analog Signal 2 II MRQ
12 - - - Not Occupied - -
13 0.5 BN / WH 585 Transmission Fluid Temperature Sensor Signal II MRQ
14 0.5 YE / GN 4170 Transmission Output Shaft Speed Sensor Circuit 9V Reference II MRQ
15 0.5 YE / BU 7763 Primary Pulley Pressure Sensor Signal II MRQ
16 0.5 BU / RD 4162 Transmission Fluid Pressure Sensor 1 Circuit 5V Reference II MRQ
17 - 21 - - - Not Occupied - -
22 0.5 GN / VT 4621 Engine Control Module LIN Bus 1 II MRQ
23 0.5 YE / BU 4171 Transmission Input Shaft Speed Sensor Circuit 9V Reference II MRQ
24 0.5 GN / VT 4510 Transmission Intermediate Speed Signal II MRQ
25 - - - Not Occupied - -
26 0.5 BK / BN 586 Transmission Fluid Temperature Sensor Low Reference II MRQ
27 0.5 BN 3706 Electronic Transmission Range Select Switch Analog Signal 1 II MRQ
28 0.5 GY / BU 4324 Transmission Auxiliary Fluid Pump Feedback Signal II MRQ
29 0.5 VT / WH 6319 Electronic Transmission Range Select Out of Park Switch 2 Signal II MRQ
30 0.5 WH / YE 6317 Electronic Transmission Range Select Out of Park Switch Signal II MRQ
31 0.5 VT / GY 7764 Secondary Pulley Pressure Sensor Signal II MRQ
32 - - - Not Occupied - -
33 0.5 GN / GY 6387 Transmission High Side Driver 1 Control II MRQ
34 0.5 BU / YE 4979 AUTOSAR CAN Bus [+] 2 Serial Data II MRQ
35 0.5 BU / YE 4979 AUTOSAR CAN Bus [+] 2 Serial Data II MRQ
36 0.5 WH 4978 AUTOSAR CAN Bus [-] 2 Serial Data II MRQ
37 0.5 WH 4978 AUTOSAR CAN Bus [-] 2 Serial Data II MRQ
38 - 40 - - - Not Occupied - -
41 0.5 BK / BU 4165 Transmission Fluid Pressure Sensor 1 Circuit Low Reference II MRQ
42 - 43 - - - Not Occupied - -
44 0.5 GY / GN 6403 Clutch Solenoid Valve D Control II MRQ
45 - 49 - - - Not Occupied - -
50 0.5 GY / BN 6388 Transmission High Side Driver 2 Control II MRQ
51 0.5 WH / YE 2159 Park Inhibit Solenoid Assembly Control II MRQ
52 - - - Not Occupied - -
53 0.5 GN / WH 2968 Transmission Auxiliary Fluid Pump Control II MRQ
54 0.5 VT / WH 422 Torque Converter Clutch Solenoid Valve Control II MRQ
55 0.5 WH 4508 Transmission Clutch G Control II MRQ
56 0.5 GN / WH 1530 Transmission Line Pressure Control Solenoid Valve Control II MRQ
57 0.5 BN 6400 Clutch Solenoid Valve A Control II MRQ
58 0.5 YE / BN 6404 Clutch Solenoid Valve E Control II MRQ
59 0.5 VT 4509 Transmission Clutch F Control II MRQ
60 0.5 WH / BU 4507 Transmission Clutch H Control II MRQ
61 - 64 - - - Not Occupied - -
65 2 BK / WH 6151 Engine Control Module Ground I MRQ
66 2 RD / YE 2172 12V Regulated Supply Voltage 1 I MRQ
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.