Circuit/System Description
WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The fuel pump control module (FPCM) monitors the voltage signal from the fuel pressure sensor. These DTCs will set if the FPCM detects that the FRP sensor voltage is out of range.