Transmission Control Module (TCM)

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Transmission Control Module (TCM) Connector End View

Courtesy of GENERAL MOTORS COMPANY

Pin	Wire	Circuit	Function
1	0.35 TN	418	TCC Solenoid Valve Control
2	0.35 L-GN	1222	Shift Solenoid Valve Control A
3	0.35 OG	1230	ISS High Signal
4-5	-	-	Not Used
6	0.35 BN	2501	High Speed GMLAN Serial Data Bus -
7	0.35 BN/BK	2500	High Speed GMLAN Serial Data Bus +
8-10	-	-	Not Used
11	0.5 BU/WH	5985	Accessory Wake-up Serial Data
12-15	-	-	Not Used
16	0.5 PU	401	OSS Low Signal
17	0.35 L-BU/WH	1229	PC Solenoid Valve Low Control
18-19	-	-	Not Used
20	0.35 GN	1223	Shift Solenoid Valve Control B
21-22	-	-	Not Used
23	0.35 GY	773	Transmission Range Switch Signal C
24-25	-	-	Not Used
26	0.35 BU/WH	1231	ISS Low Signal
27-28	-	-	Not Used
29	0.35 BN/WH	771	Transmission Range Switch Signal A
30	0.35 BN	2762	TFT Sensor Low Reference
31	0.5 PK	539	Ignition 1 Voltage
32	0.5 RD/WH	540	Battery Positive Voltage
33-34	-	-	Not Used
35	0.35 YE/BK	1227	TFT Sensor Signal
36	-	-	Not Used
37	0.35 BN	2501	High Speed GMLAN Serial Data Bus -
38	0.35 BN/BK	2500	High Speed GMLAN Serial Data Bus +
39	0.35 WH	776	Transmission Range Switch Signal P
40	0.35 OG/BK	1228	PC Solenoid Valve High Control
41	0.5 YE/GY	400	OSS High Signal
42	0.5 WH	17	Stop Lamp Switch Signal
43-45	-	-	Not Used
46	0.35 YE	772	Transmission Range Switch Signal B
47-48	-	-	Not Used
49	2 BK/WH	1551	Ground

Connector Part Information

Harness Type: Engine
OEM Connector: 13511977
Service Connector: 88987979
Description: 49-Way F (BK)

Terminal Part Information

Pins: 1 - 48
Terminal/Tray: 15359541/4
Core/Insulation Crimp: M/M
Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

Pin 49
Terminal/Tray: Pending
Core/Insulation Crimp: Pending
Release Tool/Test Probe: Pending