Section 452 (Engine Controls - Self-Diagnostics - 6.0L Bi-Fuel & CNG): Programming
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.
NOTE:
Programming is not required for the Fuel Injection Control Module. For all gasoline related programming, see PROGRAMMING
in SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L "C", "K" & "N" SERIES - FLEX FUEL & GASOLINE article.