GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Fuel Indicator Lamp (FIL)

Left side of I/P in headlamp switch assembly

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injector Control Module (FICM)

Left side of radiator support

Engine Controls Component Views

Fuel Injector Control Module Connector End Views

Fuel Rail Pressure (FRP) Sensor

Threaded into the end of the right hand CNG fuel rail

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Rail Temperature (FRT) Sensor

Threaded into the top of the right hand CNG fuel rail

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Tank Pressure (FTP) Sensor

Threaded into the HPL of a rear tank

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Tank Temperature (FTT) Sensor

Non-serviceable part of a rear tank HPL

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Gage Selector Switch

Left side of I/P in headlamp switch assembly

Engine Controls Component Views

Engine Controls Connector End Views

High Pressure Lock-off (HPL)

Threaded into end of each CNG fuel tank

Engine Controls Component Views

Engine Controls Connector End Views

HPL 1&3 10A Fuse

Fuse Block - Underhood, Fuse # 63

Electrical Center Identification Views in Wiring Systems in the G/H Van Service Manual

Electrical Center Identification Views in Wiring Systems in the G/H Van Service Manual

HPL Main 20A Fuse

Fuse Block - Underhood, Fuse # 33

Electrical Center Identification Views in Wiring Systems in the G/H Van Service Manual

Electrical Center Identification Views in Wiring Systems in the G/H Van Service Manual

HPL Relay

Fuse Block - Underhood, Relay # 62

Electrical Center Identification Views in Wiring Systems in the G/H Van Service Manual

Electrical Center Identification Views in Wiring Systems in the G/H Van Service Manual

In-line 10A Fuse

Attached to frame rail near rear CNG fuel tanks

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Low Pressure Lock-off (LPL) Relay

Left of FICM attached to radiator support

Engine Controls Component Views

Engine Controls Connector End Views

Low Pressure Lock-off (LPL) Solenoid

Right side of engine on CNG fuel rail

Engine Controls Component Views

Engine Controls Connector End Views

LPL 10A Fuse

Fuse Block - Underhood, Fuse #35

Electrical Center Identification Views in Wiring Systems in the G/H Van Service Manual

Electrical Center Identification Views in Wiring Systems in the G/H Van Service Manual

C001

Left side of engine compartment below FICM

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Engine Controls Connector End Views

C002

Left side of engine compartment below FICM

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Engine Controls Connector End Views

C003

Left side of engine compartment left of brake master cylinder

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Engine Controls Connector End Views

C004

Left side of engine compartment below brake master cylinder near vehicle frame

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Engine Controls Connector End Views

C005

Left side of engine cylinder head valve cover between Cylinders #1 and #3

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Engine Controls Connector End Views

C006

Right side of engine cylinder head valve cover at Cylinder #8

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Engine Controls Connector End Views