K 3500 Truck 4WD V8-6.6L DSL Turbo VIN 1 (2001)
PARK BRAKE SWITCH: The scan tool displays the position of the park brake pedal. The scan tool displays SET when the park brake is depressed
(switch closed). The BCM uses this data in controlling the operation of the park brake indicator, the reminder chime feature and the headlamp/DRL
system.
PASSENGER DOOR UNLOCK INPUT: The scan tool displays the state of the passenger door unlock relay. The scan tool displays ACTIVE when
the BCM senses that the passenger door unlock relay is being energized.
REMOTE FUNCTION ACTUATION (RFA) MESSAGE SINCE WAKE-UP: The scan tool displays the last message sent to the BCM from the
remote control door lock receiver.
RETAINED ACCESSORY POWER (RAP) RELAY FEEDBACK: The scan tool displays the state of the RAP relay. The scan tool displays ON
when the BCM activates the RAP relay.
SEATBELT BUCKLED: The scan tool displays the position of the drivers seatbelt buckle. The scan tool displays YES when the drivers seatbelt is
buckled. The BCM uses this data in controlling the operation of the seatbelt warning chime and the seatbelt indicator.
Input 2
AUTO HEADLAMPS: The scan tool displays the status of the auto headlamps. The scan tool displays ACTIVE when the auto headlamps are ON.
CARGO LAMP SWITCH: The scan tool displays the state of the switch. The scan tool displays ON when the cargo lights are requested by activation
of the switch.
COURTESY LAMP RELAY: The scan tool displays the state of the courtesy lamp relay. The scan tool displays ON when the BCM commands the
courtesy lamps ON by providing a ground for the courtesy lamp relay.
DIMMING POTENTIOMETER INPUT: The scan tool displays the position of the dome lamp switch (thumb wheel) when the park lamps are ON.
The scan tool displays ACTIVE when the dome lamp switch is in its normal position and the park lamps are ON.
DOME LAMP SWITCH: The scan tool displays the position of the dome lamp switch. The scan tool displays ON when the dome lamp switch is to its
full up position past the detent.
DOME OVERRIDE SWITCH: The scan tool displays the position of the dome override switch. The scan tool displays ON when the switch is
activated and requesting the BCM to override the interior lighting.
FLASH TO PASS SWITCH: The scan tool displays the position of the flash to pass switch. The scan tool displays ON when the switch is pulled to
activate the high beams momentarily while the switch is held.
FRONT FOG LAMP SWITCH: The scan tool displays the position of the front fog lamp switch. The scan tool displays ON when the front fog lamp
switch is activated with the park lamps or headlamps ON.
HEADLAMP RELAY FEEDBACK: The scan tool displays the state of the headlamps. The scan tool displays ON when the headlamp and panel
dimmer switch is manually turned to the ON position. The scan tool also displays ON when the switch is in the AUTO position and the ambient light
sensor is in its DARK state.
HIGH BEAM SWITCH: The scan tool displays the position of the high beam switch. The scan tool displays ON when the high beam switch is
activated.
LEFT TURN SIGNAL: The scan tool displays the position of the turn signal switch. The scan tool displays ON when the left turn signal is activated.
The BCM uses this data to activate the turn signal reminder chime after the vehicle has traveled 1.2 km (0.75 mi) with the turn signal switch activated.
PARK LAMPS: The scan tool displays the state of the park lamps. The scan tool displays ON when the park lamps are activated by the BCM or the
headlamp switch.
RIGHT TURN SIGNAL: The scan tool displays the position of the turn signal switch. The scan tool displays ON when the right turn signal is
activated. The BCM uses this data to activate the turn signal reminder chime after the vehicle has traveled 1.2 km (0.75 mi) with the turn signal switch
activated.
TRANSMISSION PREFERENCE: The scan tool displays the position of the Tow/Haul (transmission preference) switch. The scan tool displays ON
when the switch is activated. The BCM uses this data to illuminate the Tow/Haul indicator on the cluster. When activated the BCM also sends a Class 2
message to the PCM which handles the shift control.
Module Information 1
JULIAN DATE OF BUILD: The scan tool displays the date upon which the Body Control Module (BCM) was manufactured.
MANUFACTURE ENABLE COUNTER (MEC): The scan tool displays the actual value for the MEC in the BCM. This information is for the
assembly plant only.
