I installed a navigation system in my 2008 chevy LTZ silverado. Local dealership programed it. BUT the screen does not change directions as you turn to keep the triangle facing up. What is wrong? Did the dealership program it wrong? It works fine and I bought the latest and greatest navigation disk.

 

did you install a VSS wire? If not, that's what you need. If you did, check the connection, it probably isn't in right.

 

Along with the issues I have already mentioned, the navigation system will not re-route you when you go the wrong way. It also seems to take a long time to find itself. I checked the VSS and I do not think that is it.

What about the antenna? Can that be an issue?