I have a 2007 gmc sierra and a 2004 chevy silverado and they both have the same problem the cigarette lighter sockets don't work.All fuses have been tested and the test light indicates power at the fuse panels but no power to the outlet.Is there a hidden inline fuse?

I have tested ALL fuses including the side panel and the underhood fuse block.there is a fuse that is designated "cig lghtr" and it has power on one side as it should with the fuse removed,fuse tests as good with an ohm meter(no resistance).replacing the fuse does nothing. All fuses in both fuse panels have been tested in this manner on both trucks and yet there is no power at the socket.My auxiliary sockets on the other hand work just fine. I have tested ALL fuses including the side panel and the underhood fuse block.there is a fuse that is designated "cig lghtr" and it has power on one side as it should with the fuse removed,fuse tests as good with an ohm meter(no resistance).replacing the fuse does nothing. All fuses in both fuse panels have been tested in this manner on both trucks and yet there is no power at the socket.My auxiliary sockets on the other hand work just fine.