Buick TSB #18247
2018 Buick Regal
TSB Document:
Affected Component: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- Summary
- 18247 - Service Update - Certain vehicles with C3 clusters and RPO IOS radios show speed limit signs with ??? as the posted speed on the cluster. It does not state the actual speed limit on the road and should be recalibrated to remove from display. Vehicle needs to be re-calibrated to remove ?Speed Sign? because IOS radios do not support this feature.
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