2007 Cadillac dts and my trunk wont open. The relay is coming on but trunk still wont open. Any suggestions?

If the relay is functioning but the trunk won't open, it could be an issue with the trunk release mechanism or a blown fuse. First, check the fuse related to the trunk release in the fuse box. If the fuse is fine, inspect the trunk release switch and the wiring for any damage. If those components appear intact, consider manually unlocking the trunk from inside the vehicle or having a professional assess the lock mechanism.