Powertrain Control Module (PCM) X3 (L26+NU6)

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Powertrain Control Module (PCM) X3 (L26+NU6) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1-3	-	-	Not Used
4	0.5 TN/WH	3121	HO2S Low Signal
5	0.35 YE/BK	1227	TFT Sensor Signal
6	0.35 YE	492	MAF Sensor Signal
7	-	-	Not Used
8	0.5 BK/WH	3122	HO2S Heater Low Control - Sensor 2
9-10	-	-	Not Used
11	0.35 RD/BK	1230	AT ISS High Signal
12	0.35 YE	400	VSS High Signal
13-14	-	-	Not Used
15	0.35 GY	773	Transmission Range Switch Signal C
16-18	-	-	Not Used
19	0.5 PU	3120	HO2S High Signal
20-21	-	-	Not Used
22	0.35 YE	772	Transmission Range Switch Signal B
23	0.35 WH	776	Transmission Range Switch Signal P
24	0.35 WH	1804	TCC Release Switch Signal
25	-	-	Not Used
26	0.35 TN	472	IAT Sensor Signal
27-30	-	-	Not Used
31	0.35 WH	5268	Air Pressure Sensor
32	-	-	Not Used
33	0.35 L-GN	1222	1-2 Shift Solenoid Valve Control
34	0.35 BK/WH	771	Transmission Range Switch Signal A
35-38	-	-	Not Used
39	0.35 TN/BK	422	TCC Solenoid Valve Control
40-43	-	-	Not Used
44	0.35 PU	401	VSS Low Signal
45	-	-	Not Used
46	0.35 YE/BK	1223	2-3 Shift Solenoid Valve Control
47	0.35 RD/BK	1228	PC Solenoid Valve High Control (Sol. A)
48	0.35 BK	452	Low Reference
49	0.35 D-BU/WH	1231	AT ISS Low Signal
50	0.35 BK	2760	Low Reference
51	0.35 L-BU/WH	1229	PC Solenoid Valve Low Control (Sol. A)
52-56	-	-	Not Used

Connector Part Information

OEM: 15460474
Service: 88953347
Description: 56-Way F Micro-Pack 64 Series (GY)

Terminal Part Information

Pins: 4-6, 8, 11, 12, 15, 19, 22-24, 26, 31, 33, 34, 39, 44, 46-51
Terminal/Tray: 15359541/4
Core/Insulation Crimp: M/M
Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)