GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Fuel Injector Control Module (FICM)

Left side of radiator support behind fascia

Engine Controls Component Views

Fuel Injector Control Module Connector End Views

Fuel Rail Pressure (FRP) Sensor

Threaded into the CNG fuel rail

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Rail Temperature (FRT) Sensor

Threaded into the CNG fuel rail

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Tank Pressure (FTP) Sensor

Threaded into the CNG fuel tank HPL

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Tank Temperature (FTT) Sensor

Non-serviceable part of the CNG fuel tank HPL

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Gage Selector Switch

Left side of IP in Headlamp dimmer switch assembly

Engine Controls Component Views

Engine Controls Connector End Views

High Pressure Lock-off (HPL)

Threaded into CNG tank end

Engine Controls Component Views

Engine Controls Connector End Views

High Pressure Regulator (HPR)

Underneath vehicle mounted through left side trunk floorpan

Engine Controls Component Views

--

In-line CNG Fuel Filter

Underneath vehicle mounted near HPR

Engine Controls Component Views

--

Low Pressure Lock-off (LPL) Solenoid

Mounted to transmission bellhousing

Engine Controls Component Views

Engine Controls Connector End Views

Low Pressure Regulator (LPR)

Mounted to transmission bellhousing

Engine Controls Component Views

--

C001

Attached to the end of the CNG fuel rail

Engine Controls Component Views

Engine Controls Connector End Views

C002

Left hand side of engine compartment below the brake master cylinder

Engine Controls Component Views

Engine Controls Connector End Views

C003

Left hand side of engine compartment below the brake master cylinder

Engine Controls Component Views

Engine Controls Connector End Views

C004

Left side of the trunk compartment outside of the CNG fuel tank vent boot

Engine Controls Component Views

Engine Controls Connector End Views

C005

Left side of the trunk compartment outside of the CNG fuel tank vent boot

Engine Controls Component Views

Engine Controls Connector End Views