X171 Chassis Wiring Harness to Engine Wiring Harness

WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY	Courtesy of GENERAL MOTORS COMPANY
Connector Part Information Harness Type: Chassis Wiring Harness OEM Connector: 13974124 Service Connector: 19371189 Description: 20-Way F 1.2 MCON, 2.8 MCP Series, Sealed (BK)	Connector Part Information Harness Type: Engine Wiring Harness OEM Connector: 33156041 Service Connector: 19333031 Description: 20-Way M 1.2, 2.8 MCP Series, Sealed (BK)

Terminal Part Information

Terminal Type ID	Terminated Lead	Diagnostic Test Probe	Terminal Removal Tool
I	19300446	J-35616-12 (BU)	J-38125-12A
II	19368624	J-35616-35 (VT)	J-38125-212
III	13575364	J-35616-5 (PU)	J-38125-36
IV	19356519	J-35616-13 (BU)	J-38125-215A

Pin	Size	Color	Circuit	Terminal Type ID	Option	Function	Pin	Size	Color	Circuit	Terminal Type ID	Option
1	0.5	VT/YE	5985	I	-	Accessory Wake-Up Serial Data	1	0.5	VT/YE	5985	IV	-
2	0.5	WH	4499	I	-	High Speed GMLAN Serial Data [-] 7	2	0.5	WH	4499	IV	-
3	0.5	BU/BN	4498	I	-	High Speed GMLAN Serial Data [+] 7	3	0.5	BU/BN	4498	IV	-
4	0.5	BK/GN	3657	I	-	Exhaust Gas Temperature Sensor 3 Low Reference	4	0.5	BK/GN	3657	IV	-
5	0.5	GY/WH	5378	I	-	Exhaust Gas Temperature Sensor 3 Signal	5	0.5	GY/GN	5378	IV	-
6	0.5	BK/GY	3659	I	-	Exhaust Gas Temperature Sensor 4 Low Reference	6	0.5	BK/GY	3659	IV	-
7	0.5 0.75 0.5	VT/GN VT/GN GN/BU	4320 4320 3889	I I I	-FHS L5P L8T-N2N	Powertrain Sensor Bus Enable Powertrain Sensor Bus Enable Powertrain Sensor Bus Relay Control	7	0.75 0.5	VT/GN VT/GN	4320 4320	IV IV	L5P -FHS
8	0.5 0.5	VT/WH YE/BU	3658 1465	I I	L5P L8T	Exhaust Gas Temperature Sensor 4 Signal Secondary Fuel Pump Relay Control	8	0.5 0.5	VT/BN YE/BU	3658 1465	IV IV	L5P L8T
9	0.5	VT/BN	2927	I	-	Exhaust Aftertreatment Fuel Injector Low Control	9	0.5	VT/BN	2927	IV	-
10	0.5	BN/BU	2926	I	-	Exhaust Aftertreatment Fuel Injector High Control	10	0.5	BN/BU	2926	IV	-
11	0.75	YE/BU	1465	I	-	Secondary Fuel Pump Relay Control	11	0.5	YE/BU	1465	IV	-
12	0.5	BK/VT	3661	I	-	Exhaust Gas Temperature Sensor 5 Low Reference	12	0.5	BK/VT	3661	IV	-
13	0.5	BU/GY	3660	I	-	Exhaust Gas Temperature Sensor 5 Signal	13	0.5	BU/GY	3660	IV	-
14	0.5	GN/GY	465	I	-	Fuel Pump Primary Relay Control	14	0.5	GN/GY	465	IV	-
15	1.5	VT/BU	3674	II	-	NOx Sensor 1 Control	15	1.5	VT/BU	3674	III	-
16	1	WH/RD	6054	II	-	Exhaust Pressure Sensor 1 5V Reference	16	0.5	WH/RD	6054	III	-
17	2.5	VT/GN	355	II	-	Fuel Filter Heater Control Circuit	17	2.5	VT/GN	355	III	-
18	2.5	BU	3921	II	-	Diesel Exhaust Fluid Heater Control 1	18	2.5	BU	3921	III	-
19	1	BK/YE	6055	II	-	Exhaust Pressure Sensor 1 Low Reference	19	0.5	BK/YE	6055	III	-
20	1	BU	6053	II	-	Exhaust Pressure Sensor 1 Signal	20	0.5	BU	6053	III	-