OK..over the summer I broke down and finally bought a new replacement power antenna unit from GM partsdirect. Even though it was PITA, I installed it and it worked fine until 3 weeks ago. Now It just stays up all the time. The antenna motor is not running or anything, and the fuse is fine. I thought it might be the relay, but I can hear it clicking when I turn on the radio. Any ideas? I'd really hate to have to buy a new one again,