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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2179 (WIRING SYSTEMS AND POWER MANAGEMENT - CONNECTOR END VIEWS - 4 OF 4)TRANSMISSION CONTROL MODULE (TCM) (MW7)
2006 Chevrolet Suburban C1500, 5.3 Z

Transmission Control Module (TCM) (MW7)

2006 Chevrolet Suburban C1500, 5.3 ZSECTION Transmission Control Module (TCM) (MW7)
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Transmission Control Module (TCM) (MW7) Connector End View
GM1864287Courtesy of GENERAL MOTORS CORP.
Transmission Control Module (TCM) (MW7)

Pin Wire Circuit Function
1-5 - - Not Used
6 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus+
7-8 - - Not Used
9 0.8 BK/WH 451 Ground
10 0.5 RD/WH 1840 Battery Positive Voltage
11 0.5 OG/BK 1228 PC Solenoid Valve High Control
12-13 - - Not Used
14 0.35 GY 773 Transmission Range Switch Signal C
15-16 - - Not Used
17 0.35 PK 1224 Transmission Fluid Pressure Switch Signal A
18-19 - - Not Used
20 0.5 L-BU 1984 Transmission Turbine Speed Switch Low Reference
21-22 - - Not Used
23 0.8 YE 2522 PTO Engage Signal (PTO)
24 - - Not Used
25 0.5 OG/BK 6399 Replicated TOS Signal
26 - - Not Used
27 0.5 TN 2501 High Speed GMLAN Serial Data Bus-
28-32 - - Not Used
33 0.5 YE/BK 1223 Shift Solenoid 2 Valve Control
34 0.35 WH 776 Transmission Range Switch Signal P
35 - - Not Used
36 0.5 BN/WH 2469 PC Solenoid Valve Low Control
37-38 - - Not Used
39 0.5 D-BU/WH 1231 AT ISS Low Signal
40 0.5 L-GN/BK 822 VSS Low Signal
41-42 - - Not Used
43 0.35 D-BU 5985 Accessory Wakeup Serial Data
44-46 - - Not Used
47 0.5 TN 2501 High Speed GMLAN Serial Data Bus-
48-50 - - Not Used
51 0.5 OG/WH 2527 Shift Solenoid C Valve Control
52 0.5 L-GN 1222 Shift Solenoid 1 Valve Control
53 0.35 YE 772 Transmission Range Switch Signal B
54 0.35 YE/BK 1227 TFT Sensor Signal
55 0.5 L-BU/WH 1229 PC Solenoid Valve Low Control
56 - - Not Used
57 0.35 OG 1226 Transmission Fluid Pressure Switch Signal C
58 0.35 TN 2762 Low Reference
59 0.5 OG/BK 1230 AT ISS High Signal
60 0.5 PU/WH 821 VSS High Signal
61-62 - - Not Used
63 0.5 PK 2139 Ignition 1 Voltage
64-65 - - Not Used
66 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus+
67-68 - - Not Used
69 0.8 BK/WH 451 Ground
70 0.5 RD/WH 1840 Battery Positive Voltage
71 0.5 BN 323 Actuator Supply Voltage
72 - - Not Used
73 0.35 TN/WH 771 Transmission Range Switch Signal A
74 0.5 D-BU 1530 Transmission Mainline Pressure Solenoid Control
75-76 - - Not Used
77 0.35 L-GN/BK 2529 Fluid Pressure Switch Signal 4
78 0.5 BN 418 TCC PWM Solenoid Valve Control
79 0.35 D-BU 1225 Transmission Fluid Pressure Switch Signal B
80 0.5 OG 1983 Transmission Turbine Speed Switch Signal
Connector Part Information 
  • OEM: 13551663
  • Service: 88988934
  • Description: 80-Way F (BK)

Terminal Part Information 
  • Pins: 6, 10-11, 20, 25, 27, 33, 36, 39-40, 47, 51-52, 55, 59-60, 63, 66, 70-71, 74, 78, 80
  • Terminal/Tray: 33012-1002/26
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12094429/J-35616-14 (GN)
  • Pins: 9, 23, 69
  • Terminal/Tray: 33012-1002/26
  • Core/Insulation Crimp: 2/C
  • Release Tool/Test Probe: 12094429/J-35616-14 (GN)
  • Pins: 14, 17, 34, 43, 53-54, 57-58, 73, 77, 79
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
RENDER: 1.0x

NO RELATED

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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.