The vehicle power cable fuse for many Garmin Nuvi models goes into the tip of the plug, which is threaded and removable. Owner's manuals for Garmin Nuvi products contain instructions for fuse replacement. The support section of Garmin's official website offers a searchable database of owners manuals.
Alternatively, Garmin's official website offers a dealer locator tool, which provides dealer location and contact information for inquiries or service. As of August 2015, Garmin customer service can also be reached by phone at 913-397-8200, toll free at 800-800-1020, or via email by using the form on the support page of Garmin's official website.