Transmission Control Module (TCM) (MW7)

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 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

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	-	-	Not Used
2	0.5 PK	2139	Ignition 1 Voltage (CMD)
3-5	-	-	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
21-24	-	-	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/RD	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
37-39	-	-	Not Used
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	-	-	Not Used
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: 2, 6, 10-11, 20, 25, 27, 33, 36, 40, 47, 51-52, 55, 60, 63, 66, 70, 71, 74, 78, 80 (Early Production)
Terminal/Tray: 33012-1002/26
Core/Insulation Crimp: E/2
Release Tool/Test Probe: J-38125-2/J-35616-14 (GN)

Pins: 6, 10-11, 20, 25, 27, 33, 36, 40, 47, 51-52, 55, 60, 63, 66, 70, 71, 74, 78, 80 (Late Production)
Terminal/Tray: 33001-3004/23
Core/Insulation Crimp: E/2
Release Tool/Test Probe: J-38125-217/J-35616-14 (GN)

Pins: 9, 69 (Early Production)
Terminal/Tray: 33012-3002/26
Core/Insulation Crimp: A/E/A/C
Release Tool/Test Probe: J-38125-217/J-35616-14 (GN)

Pins: 9, 69 (Late Production)
Terminal/Tray: 3001-3004/23
Core/Insulation Crimp: A/E/A/C
Release Tool/Test Probe: J-38125-217/J-35616-14 (GN)

Pins: 14, 17, 34, 43, 53, 54, 57, 58, 73, 77, 79 (Early Production)
Terminal/Tray: 33012-3003/23
Core/Insulation Crimp: E/2
Release Tool/Test Probe: J-38125-217/J-35616-14 (GN)

Pins: 14, 17, 34, 43, 53, 54, 57, 58, 73, 77, 79 (Late Production)
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit