Transmission Control Module (TCM), Engine Side Connector End View

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

Courtesy of GENERAL MOTORS CORP.

Transmission Control Module (TCM), Engine Side Connector Parts Information

Connector Part Information

Transmission Control Module (TCM), Engine Side Connector Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	BN	418	TCC PWM Solenoid Valve Control
2	L-GN	1222	1-2 Shift Solenoid Valve Control
3	OG	1983	ISS Signal
4	-	-	Not Used
5	OG/BK	6399	Replicated TOS Signal
6	TN	2501	High Speed GMLAN Serial Data Bus -
7	TN/WH	2500	High Speed GMLAN Serial Data Bus +
8-10	-	-	Not Used
11	D-BU	5985	Accessory Wake Up Serial Data
12-13	-	-	Not Used
14	WH	687	3-2 Shift Solenoid Valve Control
15	-	-	Not Used
16	L-GN/BK	822	VSS High Signal
17	L-BU/WH	1229	PC Solenoid Valve Low Control
18-19	-	-	Not Used
20	YE/BK	1223	2-3 Shift Solenoid Valve Control
21-22	-	-	Not Used
23	GY	773	Transmission Range Switch Signal C
24	PK	1224	Transmission Fluid Pressure Switch Signal A
25	TN/BK	422	TCC Solenoid Valve Control
26-28	-	-	Not Used
29	TN/WH	771	Transmission Range Switch Signal A
30	TN	2762	Low Reference
31	PK	2139	Ignition 1 Voltage
32	RD/WH	1840	Battery Positive Voltage
33	OG	1226	Transmission Fluid Pressure Switch Signal C
34	-	-	Not Used
35	YE/BK	1227	TFT Sensor Signal
36	-	-	Not Used
37	TN	2501	High Speed GMLAN Serial Data Bus -
38	TN/WH	2500	High Speed GMLAN Serial Data Bus +
39	WH	776	Transmission Range Switch Signal P
40	OG/BK	1228	PC Solenoid Valve High Control
41	PU/WH	821	VSS Low Signal
42	L-BU/WH	6311	Brake Switch Signal
43	-	-	Not Used
44	D-BU	1225	Transmission Fluid Pressure Switch Signal B
45	L-BU	1984	Low Reference
46	YE	772	Transmission Range Switch Signal B
47-48	-	-	Not Used
49	BK/WH	451	Ground