Features, Specs and Customer reviews for Garmin nuvi 2757LM 7-Inch Portable Vehicle GPS with Lifetime Maps. The nuvi 2757lm is a big gps available from Garmin that arrives loaded with detailed maps of North America. This gps makes it easy to find addresses and millions of POIs such as businesses, stores, restaurants and other destinations. Garmin 2757lm is similar to 2557 series but the 7 incher has quite thin design. In order to keep your device up-to-date, all you need to do head to the Garmin Express website and download Garmin Express. It is a fantastic deal for such a large device, if you don’t need the extra features, the 2597lmt is the gps device to get.