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Home >> Buick >> 2020 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 171 (Component Connector End Views (K71 (X1)-P16 (X2))) >> Component Connector End Views >> K71 Transmission Control Module X1 (M3D/M3T)
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K71 Transmission Control Module X1 (M3D/M3T)

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
GM3621452Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 12672856
  • Service Connector: Pending
  • 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 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 - WH/BU 4507 Transmission Clutch H Control I -
2 - BU 6401 Clutch Solenoid Valve B Control I -
3 - GY/GN 6403 Clutch Solenoid Valve D Control I -
4 - VT 4509 Transmission Clutch F Control I -
5 - WH/GY 1786 Transmission Park/Neutral Signal 1 I -
6 - WH 2501 High Speed GMLAN Serial Data [-] 1 I -
7 -
-
YE/GN
BU
4170
2500
Transmission Output Shaft Speed Sensor Circuit 9V Reference
High Speed GMLAN Serial Data [+] 1
I
I
LGX
LTG
8 -
-
YE/BU
BU
4171
2500
Transmission Input Shaft Speed Sensor Circuit 9V Reference
High Speed GMLAN Serial Data [+] 1
I
I
LGX
LTG
9 - BK/WH 151 Ground 1 I -
10 - - - Not Occupied - -
11 - VT/BK 2139 Run/Crank Ignition 1 Voltage 21 I -
12 - VT/YE 5985 Accessory Wake-Up Serial Data I -
13 - GN/VT 4510 Transmission Intermediate Speed Signal I -
14 -
-
GY/BU
WH
6358
2501
Output Speed Signal
High Speed GMLAN Serial Data [-] 1
I
I
LGX
LTG
15 - GN/YE 6353 Input Speed Signal I -
16 - - - Not Occupied - -
17 - WH 4508 Transmission Clutch G Control I -
18 - BN 6400 Clutch Solenoid Valve A Control I -
19 - GY 6402 Clutch Solenoid Valve C Control I -
20 - YE/BN 6404 Clutch Solenoid Valve E Control I -
21 - GY/BK 5501 TCC/Clutch Select Solenoid Valve Control I -
22 - - - Not Occupied - -
23 - WH 1971 Transmission Oil Level Sensor Signal I -
24 - WH/GY 4578 Surge Accumulator Solenoid Valve Low Side Control I -
25 - 27 - - - Not Occupied - -
28 - BK/BN 586 Transmission Fluid Temperature Sensor Low Reference I -
29 - 32 - - - Not Occupied - -
33 - GN/GY 6387 Transmission High Side Driver 1 Control I -
34 - - - Not Occupied - -
35 - VT/BK 2139 Run/Crank Ignition 1 Voltage 21 I -
36 - - - Not Occupied - -
37 - BU 2500 High Speed GMLAN Serial Data [+] 1 I -
38 - WH 2501 High Speed GMLAN Serial Data [-] 1 I -
39 - 48 - - - Not Occupied - -
49 - GY/BN 6388 Transmission High Side Driver 2 Control I -
50 - - - Not Occupied - -
51 - VT/YE 5985 Accessory Wake-Up Serial Data I -
52 - - - Not Occupied - -
53 - BU 2500 High Speed GMLAN Serial Data [+] 1 I -
54 - WH 2501 High Speed GMLAN Serial Data [-] 1 I -
55 - 62 - - - Not Occupied - -
63 - BN/WH 585 Transmission Fluid Temperature Sensor Signal I -
64 - GN/YE 5724 Ignition Mode Switch Mode Control I -
65 - BK/WH 151 Ground 1 I -
66 - RD/GN 2173 12 Volt Regulated Supply Voltage 2 I -