Engine Control Module (ECM) X1 (LZE, LZ4, LZ8)

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

Fig 1: Engine Control Module (ECM) X1 (LZE, LZ4, LZ8) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.35 OG/BK	1786	Park/Neutral Signal
2-8	-	-	Not Used
9	0.5 WH	17	Stop Lamp Switch Signal
10	0.5 PU	3120	HO2S High Signal Sensor 2
11	0.5 TN/WH	3121	HO2S Low Signal Sensor 2
12	0.35 OG/BK	380	A/C Refrigerant Pressure Sensor Signal
13	0.35 TN	5514	Low Reference
14	0.5 OG/BK	6014	Low Reference (LZ8)
15	0.5 GY/BK	433	BARO Sensor Signal (LZ8)
16	0.35 PU	30	Fuel Level Sensor Signal
17	0.35 D-BU	473	High Speed Cooling Fan Relay Control
18	0.35 D-BU	5985	Accessory Wake Up Serial Data
19	0.35 PK	439	Ignition 1 Voltage
20	0.5 RD/WH	540	Battery Positive Voltage
21	0.35 OG	6030	Brake Booster Vacuum Signal (LZ8)
22	0.35 YE/BK	6032	Low Reference (LZ8)
23	0.35 PU	1272	Low Reference
24	0.35 D-GN	890	Fuel Tank Pressure Sensor Signal
25	0.35 BN	436	AIR Pump Relay Control (NU3)
26	-	-	Not Used
27	0.5 TN	2501	High Speed GMLAN Serial Data Bus-
28	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus +
29	0.35 D-BU	1161	APP Sensor 1 Signal
30	0.35 BN	1271	Low Reference
31	0.35 TN	2759	Low Reference
32	0.35 L-BU	1162	APP Sensor 2 Signal
33	0.35 GY	2709	5-Volt Reference 1
34	0.35 GY	2700	5-Volt Reference 1
35	0.5 WH/BK	2932	5-Volt Reference 1 (LZ8)
36	0.35 TN	1274	5-Volt Reference 1
37	0.35 TN/BK	472	IAT Sensor Signal
38	0.35 TN	2760	Low Reference
39-40	-	-	Not Used
41	0.35 YE	492	MAF Sensor Signal
42-46	-	-	Not Used
47	0.5 PK/BK	5290	Ignition 1 Voltage
48-49	-	-	Not Used
50	0.35 D-GN/WH	465	Fuel Pump Relay Control
51	-	-	Not Used
52	0.35 YE	447	Starter Relay Coil Control
53	0.35 GY	6031	5-Volt Reference 2 (LZ8)
54-55	-	-	Not Used
56	0.35 WH/BK	1164	5-Volt Reference 2
57	-	-	Not Used
58	0.35 D-GN	335	Low Speed Cooling Fan Relay Control
59	0.35 BN	5069	PWR/TRN Relay Control
60	-	-	Not Used
61	0.35 WH	1310	EVAP Canister Vent Solenoid Control
62	-	-	Not Used
63	0.35 D-GN/WH	459	A/C Compressor Clutch Relay Control
64	-	-	Not Used
65	0.5 GY/WH	3122	HO2S Heater Low Control Sensor 2
66-67	-	-	Not Used
68	0.35 BN/WH	419	MIL Control
69-72	-	-	Not Used
73	2 BK/WH	451	Ground

Connector Part Information

OEM: 13588763
Service: See Catalog
Description: 73-Way F 0.64 2.8 Series, Sealed (BK)

Terminal Part Information

Pins: 7, 20
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 9, 12, 13, 18, 19, 26, 33, 34, 35, 36, 37, 40, 44, 47, 48, 49, 53, 54, 55
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)