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Home >> GMC >> 2000 >> Envoy 4WD V6-4.3L VIN W >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Body Control Module >> Description and Operation >> Circuit Description >> Driver Warning Indicators
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Driver Warning Indicators

The BCM sends requests to the Instrument Panel Cluster (IPC) to turn the IPC indicators ON or OFF. These requests are sent on the Class 2 serial data line. If the IPC can not communicate with the BCM via Class 2 the IPC will turn the Security telltale ON steady. The list of messages sent by the BCM to the PC are as follows:
^ Park Brake
^ Seat Belt
^ High Beam
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