Automatic Transmission Control Module Connector End View - Engine Side

Transmission Control Module (TCM), Engine Side - 3.9L

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15463921 49-way F GT 280 Micro-64 Series, Sealed (BK)
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/BK	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	-	-	Not Used
9	WH	1804	TCC Release Switch Signal
10	PU	5526	TAP Up/TAP Down Switch Signal
11	BN	1141	Ignition 3 Voltage
12-15	-	-	Not Used
16	PU	401	VSS Low 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 Signal C
24-25	-	-	Not Used
26	D-BU/WH	1231	ISS Low Signal
27-28	-	-	Not Used
29	TN/WH	771	Transmission Range Signal A
30	BK	452	Low Reference
31	PK	39	Ignition 1 Voltage
32	RD/WH	2040	Battery Positive Voltage
33-34	-	-	Not Used
35	YE/BK	1227	TFT Sensor Signal
36	-	-	Not Used
37	TN	2501	High Speed GMLAN Serial Data Bus
38	TN/BK	2500	High Speed GMLAN Serial Data Bus
39	WH	776	Transmission Range Signal P
40	OG/BK	1228	PC Solenoid Valve High Control
41	YE	400	VSS High Signal
42	WH	17	Stop Lamp Switch Signal
43-45	-	-	Not Used
46	YE	772	Transmission Range Signal B
47-48	-	-	Not Used
49	BK/WH	1451	Ground