Circuit/System Description

The body control module (BCM) applies voltage to the high speed GMLAN serial data wake up circuit, when the ignition key is in ACC, ON or START to enable several modules for bus communication.

Depending on option content, modules that may receive the signal are as follows:

• Drive motor generator battery control module (BECM) (RPO HP2)
• Electronic brake control module (EBCM)
• Electronic suspension control (ESC) module
• Fuel pump flow control module (FPCM)
• Power steering control module (PSCM) (RPO HP2)