K20 Engine Control Module X1 (LGX)

WARNING: This page is about a different car, the 2020 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY

Connector Part Information

Harness Type:Engine
OEM Connector: 34566-0303
Service Connector: 13574782
Description: 73-Way F 0.64, 2.8 Series, Sealed (BK with GY Terminal Position Assurance)

Terminal Part Information

Terminal Type ID	Terminated Lead	Diagnostic Test Probe	Terminal Removal Tool
I	13578937	J-35616-35 (VT)	J-38125-11A
II	19354746	J-35616-64B (LT BU)	J-38125-215A

Pin	Size	Color	Circuit	Function	Terminal Type ID	Option
1 - 3	-	-	-	Not Occupied	-	-
4	0.5	WH	4499	High Speed GMLAN Serial Data [-] 7	II	LGX
5	0.5	BK/VT	1272	Accelerator Pedal Position Low Reference 2	II	LGX
6	0.5	YE/WH	1161	Accelerator Pedal Position Signal 1	II	LGX
7	0.5	BK/BU	1271	Accelerator Pedal Position Low Reference 1	II	LGX
8	0.5	WH	7494	High Speed GMLAN Serial Data [-] 3	II	LGX
9	0.5	BK/YE	5382	Brake Position Sensor Low Reference	II	LGX
10 - 11	-	-	-	Not Occupied	-	-
12	0.5	WH	2501	High Speed GMLAN Serial Data [-] 1	II	LGX+M3V
13	0.5	WH/BU	6311	Cruise/ETC/TCC Brake Signal	II	LGX
14	0.5	WH/GY	459	A/C Compressor Clutch Relay Control	II	LGX
15	0.5	YE	5991	Powertrain Relay Coil Control	II	LGX
16	0.5	BN/WH	419	Check Engine Indicator Control	II	-
17 - 19	-	-	-	Not Occupied	-	-
20	0.5	BU/BN	4498	High Speed GMLAN Serial Data [+] 7	II	LGX
21	0.5	BN/RD	1274	Accelerator Pedal Position 5V Reference 2	II	LGX
22	0.5	GN/WH	1162	Accelerator Pedal Position Signal 2	II	LGX
23	0.5	WH/RD	1164	Accelerator Pedal Position 5V Reference 1	II	LGX
24	0.5	BU/BK	7493	High Speed GMLAN Serial Data [+] 3	II	LGX
25	0.5	WH/RD	5381	Brake Position Sensor 5V Reference	II	LGX
26	0.5	WH/GN	5380	Brake Position Sensor Signal	II	LGX
27	-	-	-	Not Occupied	-	-
28	0.5	BU	2500	High Speed GMLAN Serial Data [+] 1	II	LGX+M3V
29	-	-	-	Not Occupied	-	-
30	0.5	GN/WH	492	Mass Air Flow Sensor Signal	II	LGX
31	0.5	YE/BK	625	Starter Enable Relay Control	II	KL9+LGX
32 - 33	-	-	-	Not Occupied	-	-
34	0.5	GY	5127	After Boil Heater Relay Control	II	KL9+LGX
35 - 38	-	-	-	Not Occupied	-	-
39	0.5	GY/BU	7564	Humidity Sensor Signal	II	LGX
40	0.5	YE/BU	4171	Transmission Position Sensor A 9V Reference	II	LGX+M3V
41 - 43	-	-	-	Not Occupied	-	-
44	0.5	BK/WH	2151	Signal Ground	II	LGX
45	0.5	YE/RD	6031	Brake Vacuum Sensor 5V Reference	II	LGX
46	0.5	GY	4109	Driver Mode Switch 5V Reference	II	LGX+URC
47	0.5	BN/RD	2700	A/C Pressure Sensor 5V Reference	II	LGX
48	-	-	-	Not Occupied	-	-
49	0.5	VT/BU	5292	Powertrain Main Relay Fused Supply 3	II	LGX
50	0.5	VT/BU	5291	Powertrain Main Relay Fused Supply 2	II	LGX
51	0.5	VT/YE	5985	Accessory Wake-Up Serial Data	II	LGX
52	0.5	RD/WH	140	Battery Positive Voltage	II	LGX
53 - 55	-	-	-	Not Occupied	-	-
56	0.5	YE	4063	Hood Status A Signal	II	-
57 - 59	-	-	-	Not Occupied	-	-
60	0.5	WH/BU	5726	Ignition Mode Switch Mode Control Backup	II	LGX+M3V
61 - 63	-	-	-	Not Occupied	-	-
64	0.5	BU/GY	636	Outside Ambient Air Temperature Sensor Signal	II	LGX
65	0.5	YE/VT	6030	Brake Vacuum Sensor Signal	II	LGX
66	0.5	WH/VT	4108	Driver Mode Switch Signal	II	LGX+URC
67	0.5	GN	380	A/C Refrigerant Pressure Sensor Signal	II	LGX
68	-	-	-	Not Occupied	-	-
69	0.5	GN/GY	465	Fuel Pump Primary Relay Control	II	LGX
70	0.5	YE/VT	4325	Starter Pinion Solenoid Relay Control	II	KL9+LGX
71	0.5	VT/GY	139	Run/Crank Ignition 1 Voltage	II	LGX
72	0.5	VT/BU	5291	Powertrain Main Relay Fused Supply 2	II	LGX
73	2.5	VT/BU	5290	Powertrain Main Relay Fused Supply 1	I	LGX