Iphone 6 GPS not working

I got a new iphone 6, 2 weeks ago. GPS never worked. All the resets possibles have been done.

I been talking to verizon and apple and they can't figure it out.

Today I drove in my dad's car and the gps work fine, it never stopped.

I tried in my car and 10 secs into my drive gps just said "locating"

I drove my dad's car again just in case it was a coincidence, but it worked fine as well.

Now I drive a Nissan Pathfinder 2002. What can possibly be blocking gps signal from my car?

Any help would be appreciated