Powertrain Control Module (PCM) X2 (L26)

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

Fig 1: Powertrain Control Module (PCM) X2 (L26) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.5 PK/YE	1456	EGR Valve Position Signal
2	0.5 WH/BK	1061	UART Serial Data Secondary
3	0.5 TN/OG	800	UART Serial Data Primary
4	0.5 TN/PK	845	Fuel Injector 5 Control
5	0.5 TN/OG	1744	Fuel Injector 1 Control
6	0.5 YE/BK	846	Fuel Injector 6 Control
7	0.5 PK/BK	1746	Fuel Injector 3 Control
8	0.5 TN/D-GN	2753	Low Reference
9	0.5 L-GN/BK	1745	Fuel Injector 2 Control
10	0.5 YE/BK	844	Fuel Injector 4 Control
11	0.5 PU/WH	424	IC Timing Signal
12	0.8 GY	3112	HO2S Heater Low Control Sensor 1
13	0.5 OG/WH	1676	EGR Solenoid High Control
14-15	-	-	Not Used
16	0.5 D-GN	435	EGR Solenoid Low Control
17	-	-	Not Used
18	0.5 YE/GY	469	MAP Sensor Signal
19-25	-	-	Not Used
26	0.5 TN/YE	630	Camshaft Position Signal
27	0.35 PU/WH	430	Low Resolution Engine Speed Signal
28	0.5 L-BU/BK	647	Medium Resolution Engine Speed Signal
29	0.5 TN/L-BU	2761	Low Reference
30	0.5 L-GN	432	Low Reference
31	0.5 BN	1174	Oil Level Switch Signal
32	-	-	Not Used
33	0.5 GY/BK	2702	5-Volt Reference 1
34	0.5 OG/WH	2704	5-Volt Reference 2
35	0.5 BN/WH	6790	Air Injection Pressure Sensor 5-Volt Reference 2 (NU6)
36	-	-	Not Used
37	0.5 OG/BK	453	Low Reference
38-40	-	-	Not Used
41	0.5 D-GN/WH	428	EVAP Canister Purge Solenoid Control
42-44	-	-	Not Used
45	0.5 GY/WH	23	Generator Field Duty Cycle Signal
46	0.5 D-BU	496	Knock Sensor Signal 1
47	0.5 TN/PK	3111	HO2S Low Reference Sensor 1
48	0.5 PU/WH	3110	HO2S Reference Voltage Sensor 1
49-52	-	-	Not Used
53	0.5 OG	225	Generator Turn On Signal
54	-	-	Not Used
55	0.5 YE	410	ECT Sensor Signal
56	-	-	Not Used
57	0.5 TN/BK	231	Oil Pressure Switch Signal
58	0.5 L-BU	1876	Knock Sensor 2 Signal
59	0.5 PU	421	AIR Solenoid Relay Control (NU6)
60	-	-	Not Used
61	0.5 WH	423	IC Timing Control
62-72	-	-	Not Used
73	2 BK/WH	1551	Ground

Connector Part Information

OEM: 15497526 (- NU6), 13528610 (NU6)
Service: See Catalog
Description: 73-Way F Micro-Pack, Sealed (BK)

Terminal Part Information

Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit