This has happened to me twice in the last year, power off, power on and it goes back to normal. Also found if you go to sound system and switch from stereo to surround it will come back.
I believe just put the rail on, the rail won't touch those bolts as your only mounting the ends. If I remember I trail fitted and checked before installation.
I've got one coming from under the L/S dash below the lighting console and one around the L/S headliner along the door seal, driving me crazy. I've taken things apart because I know the dealer won't be of any help and still can't find it. Seems to be more apparent when the weather is cool but...
It seems that everyone who responded has forgotten what the Owners manual says. Please read under Tire Care page 345/346. I move mine side to side at every oil change and believe me the tires last a lot longer.