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Home >> Chevrolet >> 2005 >> Chevy Express G3500, Van Passenger Extended >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Control System - 6.0L (CNG) - Introduction) >> Description and Operation >> Fuel System Description >> Fuel Injector Control Module (FICM)

Fuel Injector Control Module (FICM)

WARNING: This page is about a different variant/trim than selected.

The PCM is connected to the FICM. The PCM is not capable of operating the high current CNG fuel injectors. The PCM injector pulse width signals are received by the FICM and duplicate pulse width signals are generated by the FICM in order to operate the CNG injectors. KL6 equipped vehicles utilize a FICM that contains internal relays. When operating on gasoline the internal relays allow the PCM injector pulse width to go directly to the gasoline injectors. Refer to Fuel Injector Control Module Description  for more detailed description information.

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