Transmission Control Module (TCM) (MW7)

WARNING: This page is about a different car, the 2014 GMC Sierra 3500 HD, 2014 GMC Sierra 2500 HD, 2014 Chevrolet Silverado 3500 HD, and 2014 Chevrolet Silverado 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY

Connector Part Information

Harness Type: Engine Chassis
OEM Connector: 15499493
Service Connector: 88988938
Description: 80-Way F (BK)

Terminal Part Information

Terminated Lead: 13575808
Release Tool: J-38125-217
Diagnostic Test Probe: J-35616-14 (GN)
Terminal/Tray: 33012-3002/26
Core/Insulation Crimp: Pins: 2, 6, 10-11, 14, 17, 20, 25, 27, 33-34, 36, 40, 43, 47, 51-55, 57-58, 60, 63, 66, 70-71, 73-74, 77-80 - E/2
Core/Insulation Crimp: Pins: 9, 69 - A/E/A/C

Transmission Control Module (TCM) (MW7)

Pin	Wire	Circuit	Function
1	-	-	Not Used
2	0.5 PK/WH	2139	Ignition 1 Voltage
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	0.5 GY	773	Transmission Range Switch Signal C
15-16	-	-	Not Used
17	0.5 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	0.5 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	0.5 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	0.5 YE	772	Transmission Range Switch Signal B
54	0.5 YE/BK	1227	TFT Sensor Signal
55	0.5 L-BU/WH	1229	PC Solenoid Valve Low Control
56	-	-	Not Used
57	0.5 OG	1226	Transmission Fluid Pressure Switch Signal C
58	0.5 TN	2762	Low Reference
59	-	-	Not Used
60	0.5 PU/WH	821	VSS High Signal
61-62	-	-	Not Used
63	0.5 PK/WH	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	0.5 TN/WH	771	Transmission Range Switch Signal A
74	0.5 D-BU/WH	1530	Transmission Mainline Pressure Solenoid Control
75-76	-	-	Not Used
77	0.5 L-GN/BK	2529	Fluid Pressure Switch Signal 4
78	0.5 BN	418	TCC PWM Solenoid Valve Control
79	0.5 D-BU	1225	Transmission Fluid Pressure Switch Signal B
80	0.5 OG	1983	Transmission Turbine Speed Switch Signal