Conditions for Running the DTC
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The microprocessor runs the program to detect a check sum error after each power up. This program runs only if the DTC B1327 is not set as a current DTCs.