Sierra 3500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
This table identifies which serial data link that a particular module uses for in-vehicle data transmission. Some modules may use more than one data
link to communicate. This table is used to assist in correcting a communication malfunction between the control module and the scan tool. For the
description and operation of these serial data communication circuits refer to Data Link Communications Description and Operation.
