DAStx435

I have a 2011 HHR LT that replaced a 2006 HHR LS. The cruise control and the “Center high mount stop light” (CHMSL) does not work. Also I am having a power drain from the battery. The tail/brake lights were LED lights. I have replaced those with the filament bulbs. I also have replaced the brake switch on the brake pedal. Occasionally I will go out and look at the HHR and the center high mount stop light will be lit. I have done a lot of reading and troubleshooting these problems and I am at a loss. I have also cleaned all of the battery connections from the battery to the fuse box. Any help would be greatly appreciated on what else I can do. In advance thank you.