CNG Control Module (LC8)

WARNING: This page is about a different car, the 2014 GMC Sierra 3500 HD, 2014 GMC Sierra 2500 HD, 2014 Chevrolet Silverado 3500 HD, and 2014 Chevrolet Silverado 2500 HD. 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: CNG Harness
OEM Connector: 211PC562S0009
Service Connector: Service By Harness - See Part Catalog
Description: 56-Way F 1.5 SICMA-3 Series, Sealed (BK)

Terminal Part Information

Pins: 1-18, 21-28, 30, 33-48, 51-56
Terminated Lead: 13578826
Release Tool: J-38125-560
Diagnostic Test Probe: J-35616-2A (GY)
Terminal/Tray: Not Available
Core/Insulation Crimp: 2/4

Pins: 19, 20, 49, 50
Terminated Lead: 13578826
Release Tool: J-38125-553
Diagnostic Test Probe: J-35616-18 (BK)
Terminal/Tray: Not Available
Core/Insulation Crimp: Not Available

CNG Control Module (LC8)

Pin	Wire	Circuit	Function
1	BU/OG	-	Coolant Temperature Input
2	RD/WH	-	5-Volt Output
3	BU/GN	-	Fuel Pressure Input
4	BU/RD	-	CNG Tank Temperature Input
5	PU/WH	-	Not Used
6	PU	-	Not Used
7	BU/YE	-	5-Volt Output
8	WH/GN	-	Alternative Fuel Enable Relay
9	WH	-	Serial K
10	TN/BK	-	High Speed GMLAN Serial Data Bus (+)
11	-	-	Not Occupied
12	RD	-	Power
13	-	-	Not Occupied
14	GN/BK	-	CNG Tank Lock #1 Off Control
15	WH/BK	-	Alternative Fuel Injector 1 Control
16	WH/BN	-	Alternative Fuel Injector 2 Control
17	WH/RD	-	Alternative Fuel Injector 3 Control
18	WH/OG	-	Alternative Fuel Injector 4 Control
19	BK	-	Alternative Fuel Injector Ground
20	GN	-	Alternative Fuel Enable Relay
21	WH/YE	-	Alternative Fuel Injector 5 Control
22	WH/GN	-	Alternative Fuel Injector 6 Control
23	WH/BU	-	Alternative Fuel Injector 7 Control
24	WH/PU	-	Alternative Fuel Injector 8 Control
25	L-GN	-	OEM Injector Input 5
26	L-BU	-	OEM Injector Input 6
27	YE	-	OEM Injector Input 7
28	BU	-	OEM Injector Input 8
29	-	-	Not Used
30	BU/BK	-	Fuel Temp Sensor Input
31	-	-	Not Used
32	-	-	Not Used
33	PU/WH	-	Not Used
34	PU	-	Not Used
35	PU/GN	-	Not Used
36	BU/YE	-	CNG Tank Pressure Input
37	GN/WH	-	CNG Switched 12 Volt Signal
38	TN	-	High Speed GMLAN Serial Data Bus (-)
39	BK	-	Ground
40	PK	-	OEM Injector Positive Voltage Bank 1
41	PK/WH	-	OEM Injector Positive Voltage Bank 2
42	GN/BK	-	CNG Tank Cut-Off 2 Control
43	TN	-	OEM Injector 1 Output
44	TN/GN	-	OEM Injector 1 Input
45	PK/BK	-	OEM Injector 2 Output
46	PK/GN	-	OEM Injector 2 Input
47	BK	-	CNG Injector Ground
48	GN	-	Switched Battery Positive
49	TN/WH	-	OEM Injector 3 Output
50	TN/BU	-	OEM Injector 3 Input
51	OG/BK	-	OEM Injector 4 Output
52	OG/GN	-	OEM Injector 4 Input
53	L-GN/BK	-	OEM Injector 5 Output
54	L-BU/BK	-	OEM Injector 6 Output
55	YE/BK	-	OEM Injector 7 Output
56	BU/WH	-	OEM Injector 8 Output