K 2500 Suburban 4WD V8-5.7L VIN R (1999)
CLEARING BCM DTCS
Current DTCs (21 to 24) are displayed as long as the BCM detects the fault to be current in the diagnostic mode. History DTCs (31 to 34) remain
stored by the body control module (BCM) until cleared. Current and history DTCs can be cleared by depressing and holding the door lock switch
in the unlock position for 4 seconds while the BCM is in the diagnostic mode. After 4 seconds, an audible warning tone will sound 3 times
confirming that the DTCs have been cleared.
Diagnostic Trouble Code (DTC) List/Type
Intermittents and Poor Connections
Faulty electrical connections and faulty wiring cause most intermittent faults. However, a damaged PasslockTM/electronic variable orifice module can
occasionally be the cause. Refer to Diagrams / Diagnostic Aids / Intermittent and Poor Connections for a detailed explanation of locating and
repairing intermittent conditions.
