Affected Component: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

Date Published
SEP 13, 2018
NHTSA TSB #
10147329
TSB Document
Summary
18248 - Service Update - Certain 2018 Buick Regal vehicles with C4 clusters and RPO IOT radios do not provide a ?Speed Sign? in the cluster display. This feature needs to be calibrated onto the radio. Vehicle needs to be re-calibrated to add ?Speed Sign? to IOT radio.