3500 Sierra Denali navigation system
Just purchased my new 2015 Sierra. Have a couple of questions on the Navigation system. 1. The Truck is equipped with the navigation system as well as onstar. If I do not keep onstar will I loose th...
Forum Discussion
We have 2013 nav and had Onstar. Onstar does NOT keep nav maps updated. The only way to update maps is to spend a couple hundred for an update cd...kind of crazy it costs more for a nav update than for a tomtom or farming that includes free updates for life!! Wish that GM would just contract with tarmi or tomtom so w e could have those nags included in-dash
