I just purchased a used 2008 Chevy Tahoe ltz with 92000 miles on it. Car fax checked good on it and it is in great shape but I cannot seem to get the rear heated seats to work. It has the rear bench seat and I can see a connector beneath each seat next to the door but both electrical connectors are plugged into plastic blanks. Nothing happens when I press the heated seat button on rear Hvac controls. Everything else works properly except for power folding third row. Not sure if that’s related or not.