The fix was easy but tedious. I sprayed the base of each brass valve stem with Liquid Wrench then used a pair of channel locks to grab the stem at the base and twisted just a little. I did this five or six times a day for four days. Each time the Liquid Wrench was able to penetrate just a little deeper. On Day 4 things broke free and now all knobs are turning just fine.
The grill cover that came with the Genesis was pretty ratty.
Weber Genesis grill cover on Amazon.
The side burner hadn't been used for a while...I could tell by the wasps nest that was built under the burner.
I am delighted to have this great grill in my collection! This Genesis Gold C sits alongside my Genesis 1000 LX and my Genesis Silver A. My backyard is looking sweeter and sweeter all the time!