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GMLAN and CAN Repairs

WARNING: This page is about a different car, the 2020 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

When making a repair to any GMLAN or CAN network, the original wire length after the repair must be the same length as before the repair. If the network is a twisted pair, the twist must be maintained after the repair is completed.

Low speed GMLAN has a single wire and communicates at a slower speed. High speed GMLAN and CAN has two wires in a twisted pair and works at higher speeds. For more information on GMLAN and CAN serial data protocol, refer to Data Link Communications Description and Operation .

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