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Data Link Communications Description and Operation: Notes

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

This is an overview of different serial data buses used by GM devices to communicate with each others. Use Data Communication Wiring Schematics  to find out which serial data buses are configured for a specific vehicle.

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