Fuel Injection Control Module
WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
On Bi-Fuel and CNG engines, an Fuel Injection Control Module (FICM) is used. The FICM is located on the right side of engine compartment below the air filter assembly. See Fig 1.