Section 448 (Engine Controls Self-Diagnostics - 6.0L Bi-Fuel & CNG): Programming
WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. 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 EXPRESS & SAVANA - GASOLINE article.