K Yukon/Denali 4WD V8-5.7L VIN R (2000)
^
Flash the FASTEN SEATBELT indicator lamp.
^
Sound an audible warning tone.
^
Flash the courtesy lamps.
The above actions can be caused by such transitions as switching the interior lamps switch to the ON or OFF position.
On vehicles equipped with universal theft deterrent, each transition at the interior lamps command input will cause the BCM to step through the
following actions:
DTC Display Order
In the diagnostic mode, diagnostic trouble codes (DTCs) are displayed in numerical order. The first DTC displayed is always DTC 12, followed by any
current DTCs (21 to 24) or any history DTCs (31 to 34). Remote control door lock transmitter diagnostic DTCs (41 to 45) will then be displayed if
activated while in the diagnostic mode. The last DTC displayed is the begin configuration display (55). The first number following DTC 55 is the
hardware configuration. The second number is the software configuration. DTC 55 and the 2 configuration numbers are always displayed. After the
configuration numbers are displayed, the entire list is repeated beginning with DTC 12. System faults are stored as current or history DTCs. When
working on systems controlled by the body control module, always refer to this section and test for DTCs.
