Powertrain Control Module (PCM) C3 (NU3)

Fig 1: PCM C3 Connector End View (NU3)

Courtesy of GENERAL MOTORS CORP.

PCM C3 Connector Part Information (NU3)

Connector Part Information

Terminal Part Information

PCM C3 Connector Terminal Identification (NU3)

Pin	Wire Color	Circuit No.	Function
1-3	-	-	Not Used
4	TN/WH	3121	HO2S Low Signal
5	YE/BK	1227	TFT Sensor Signal
6	YE	492	MAF Sensor Signal
7	-	-	Not Used
8	BK/WH	3122	HO2S Heater Low Control - Sensor 2
9-10	-	-	Not Used
11	RD/BK	1230	AT ISS High Signal
12	YE	400	VSS High Signal
13-14	-	-	Not Used
15	GY	773	Transmission Range Switch Signal C
16-18	-	-	Not Used
19	PU	3120	HO2S High Signal
20-21	-	-	Not Used
22	YE	772	Transmission Range Switch Signal B
23	WH	776	Transmission Range Switch Signal P
24	WH	1804	TCC Release Switch Signal
25	-	-	Not Used
26	TN	472	IAT Sensor Signal
27-30	-	-	Not Used
31	WH	5268	Air Pressure Sensor
32	-	-	Not Used
33	L-GN	1222	1-2 Shift Solenoid Valve Control
34	BK/WH	771	Transmission Range Switch Signal A
35-38	-	-	Not Used
39	TN/BK	422	TCC Solenoid Valve Control
40-43	-	-	Not Used
44	PU	401	VSS Low Signal
45	-	-	Not Used
46	YE/BK	1223	2-3 Shift Solenoid Valve Control
47	RD/BK	1228	PC Solenoid Valve High Control (Sol. A)
48	BK	452	Low Reference
49	D-BU/WH	1231	AT ISS Low Signal
50	BK	2760	Low Reference
51	L-BU/WH	1229	PC Solenoid Valve Low Control (Sol. A)
52-56	-	-	Not Used