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Home >> Chevrolet >> 2016 >> Express 3500 Base, Van Cargo, 4.8L Eng VIN F >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U2099: High Speed Communication Enable Circuit >> Circuit/System Description
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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:

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