Do you have to take your vehicle to a dealer to replace the cm in an Oldsmobile silhouette?

No, you do not have to take your Oldsmobile Silhouette to a dealer to replace the control module (CM). Many independent auto repair shops can perform this service, and some experienced DIYers may even handle the replacement themselves with the right tools and knowledge. However, it's important to ensure that the replacement part is compatible and that the vehicle's systems are properly reprogrammed if necessary.