Transmission Control Module (TCM) Connector End View

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

Courtesy of GENERAL MOTORS CORP.

Transmission Control Module (TCM) Parts Information

Connector Part Information

Pin	Wire Color	Circuit No.	Function
1	BN	418	TCC Solenoid Valve Control
2	L-GN	1222	Shift Solenoid Valve Control A
3	OG	1230	ISS High Signal
4-5	-	-	Not Used
6	TN	2501	High Speed GMLAN Serial Data Bus -
7	TN/BK	2500	High Speed GMLAN Serial Data Bus +
8-10	-	-	Not Used
11	D-BU	5985	Accessory Wake-up Serial Data
12-15	-	-	Not Used
16	PU	401	OSS Low Signal
17	L-BU/WH	1229	PC Solenoid Valve Low Control
18-19	-	-	Not Used
20	D-GN	1223	Shift Solenoid Valve Control B
21-22	-	-	Not Used
23	GY	773	Transmission Range Switch Signal C
24-25	-	-	Not Used
26	D-BU/WH	1231	ISS Low Signal
27-28	-	-	Not Used
29	TN/WH	771	Transmission Range Switch Signal A
30	TN	2762	TFT Sensor Low Reference
31	PK	539	Ignition 1 Voltage
32	RD/WH	540	Battery Positive Voltage
33-34	-	-	Not Used
35	YE/BK	1227	TFT Sensor Signal
36-38	-	-	Not Used
39	WH	776	Transmission Range Switch Signal P
40	OG/BK	1228	PC Solenoid Valve High Control
41	YE/GY	400	OSS High Signal
42	WH	17	Stop Lamp Switch Signal
43-45	-	-	Not Used
46	YE	772	Transmission Range Switch Signal B
47-48	-	-	Not Used
49	BK/WH	1551	Ground