Transmission Control Module (TCM)

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

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.35 BN	418	TCC PWM Solenoid Valve Control
2	0.35 L-GN	1222	1-2 Shift Solenoid Valve Control
3	0.35 OG/BK	1230	AT ISS High Signal
4	-	-	Not Used
5	0.5 OG	381	Vehicle Speed Signal (LS4)
6	0.35 TN	2501	High Speed GMLAN Serial Data Bus -
7	0.35 TN/BK	2500	High Speed GMLAN Serial Data Bus +
8	-	-	Not Used
9	0.35 WH	1804	TCC Release Switch Signal
10	-	-	Not Used
11	0.35 D-BU	5985	Accessory Wake Up Serial Data
12-15	-	-	Not Used
16	0.35 PU	401	Signal Low - Front
17	0.35 L-BU/WH	1229	PC Solenoid Valve Low Control
18-19	-	-	Not Used
20	0.35 YE/BK	1223	2-3 Shift Solenoid Valve Control
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	AT ISS Low Signal
27-28	-	-	Not Used
29	0.35 TN/WH	771	Transmission Range Switch Signal A
30	0.35 TN	2762	Low Reference
31	0.35 PK	1339	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	0.5 TN	2501	High Speed GMLAN Serial Data Bus -
38	0.5 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	0.35 YE	400	Signal High - Front
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	0.8 BK/WH	451	Ground

Connector Part Information

Terminal Part Information