Engine Controls Component Views

Fig 1: Identifying Engine Controls Electrical Components

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Inline Connector C004
2	Inline Connector C005, C006
3	Lock-off Solenoid Relay Connector
4	Injector Relays - Even Bank
5	Injector Relays - Odd Bank
6	AF Fuel Mode Relay
7	In-Line AF Fuses
8	Fuel Tank Pressure Sensor Connector
9	Fuel Tank Pressure (FTP) Sensor
10	CNG Fuel Tank
11	High Pressure Lock-off (HPL) Solenoid Connector
12	High Pressure Lock-off (HPL) Solenoid
13	Fuel Tank Temperature (FTT) Sensor Connector
14	Low Pressure Lock-off (LPL) Solenoid Connector
15	Low Pressure Lock-off (LPL) Solenoid
16	Intermediate Pressure Regulator (IPR)
17	Fuel Rail Pressure (FRP) Sensor Connector
18	Left Hand Gaseous Fuel Rail
19	Gaseous Fuel Injector
20	Gaseous Fuel Injector Connector
21	Fuel Rail Temperature (FRT) Sensor Connector
22	Right Side Inner Fender
23	Alternative Fuel Injector Control Module (FICM) Connector C001
24	Alternative Fuel Injector Control Module (FICM)

Fig 2: Identifying Fuel System Components

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Left Hand Gaseous Fuel Rail
2	Right Hand Gaseous Fuel Rail
3	Gaseous Fuel Injector (1 of 8)
4	High Pressure Regulator (HPR) Coolant Lines
5	High Pressure Regulator (HPR)
6	Inline CNG Fuel Filter
7	High Pressure Lock-off (HPL) Fitting CNG Fuel Line
8	Pick-up Box Floor
9	CNG Fuel Fill Valve
10	CNG Fuel Fill Line
11	Left Hand Vehicle Frame Rail
12	Chassis CNG Fuel Line
13	Chassis Fuel Line Pick-up Box Pass-through
14	Low Pressure Lock-off (LPL) Solenoid CNG Fuel Line Inlet Fitting
15	Low Pressure Lock-off (LPL) Solenoid
16	Intermediate Pressure Regulator (IPR)

Fig 3: Identifying Fuse Block Underhood

Courtesy of GENERAL MOTORS CORP.

Fig 4: Identifying Instrument Panel Fuse Block

Courtesy of GENERAL MOTORS CORP.

Fig 5: Identifying Alternative Fuel Injector Relays

Courtesy of GENERAL MOTORS CORP.