I have 2010 tundra crewmax, and i didnt wire in the reverse signal wire because i forgot. Not having any issues with my gps. Gps currently works great. Just wondering how crucial this wire is and if anyone is having problems without this wire? I'm not exactly sure where this wire connects to? Any info or feedback would be helpful. THX.

Its only used if you have a rear view camera.

Thanx vblue! I had heard gps might be affected if this wire was not connected.