K20 Engine Control Module X1 (LGX)

WARNING: This page is about a different car, the 2023 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 Wiring Harness
OEM Connector: 34566-0194
Service Connector: 13574782
Description: 73-Way F 0.64, 2.8 Series, Sealed (BK with BU Terminal Position Assurance)

Terminal Part Information

Terminal Type ID	Terminated Lead	Diagnostic Test Probe	Terminal Removal Tool
I	13587518	J-35616-35 (VT)	J-38125-11A
II	19354746	J-35616-64B (L-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
13	0.5	WH/BU	6311	Cruise/ETC/TCC Brake Signal	II	LGX
14	0.5	WH/GY	459	Air Conditioning 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	LGX
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
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	LGX
32 - 38	-	-	-	Not Occupied	-	-
39	0.5	GY/BU	7564	Humidity Sensor Signal 2	II	LGX
40 - 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	Air Conditioning Pressure Sensor 5V Reference	II	LGX
48	-	-	-	Not Occupied	-	-
49	0.5	VT/BU	5292	Powertrain Main Relay Fused Supply Voltage 3	II	LGX
50	0.5	VT/BU	5291	Powertrain Main Relay Fused Supply Voltage 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	LGX
57 - 63	-	-	-	Not Occupied	-	-
64	0.5	BU/GY	636	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	Air Conditioning 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 Actuator Relay Control	II	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 Voltage 2	II	LGX
73	2.5	VT/BU	5290	Powertrain Main Relay Fused Supply Voltage 1	I	LGX