Transmission Control Module (TCM)

WARNING: This page is about a different car, the 2008 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 CORP.

Pin	Wire	Circuit	Function
1	0.35 BN	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 TN	2501	High Speed GMLAN Serial Data Bus -
7	0.35 TN/BK	2500	High Speed GMLAN Serial Data Bus +
8-10	-	-	Not Used
11	0.5 D-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 D-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 D-BU/WH	1231	ISS Low Signal
27-28	-	-	Not Used
29	0.35 TN/WH	771	Transmission Range Switch Signal A
30	0.35 TN	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 TN	2501	High Speed GMLAN Serial Data Bus -
38	0.35 TN/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

OEM: 13511977
Service: See Catalog
Description: Connector 49-Way GT 280 Micro 64 Series SLD 5P4 (BK)

Terminal Part Information

Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit