So, I've been getting the rattling sound from the door area when driving at high speeds in my 2014 ATS which has been driving me crazy, found out it's related to the seatbelt retraction area. Uploaded a video below that shows that clicking sound when moving seatbelt around. I tried putting some tape inside but didn't work. I can only take of the small plastic on where the seatbelt retracts, but not the b pillar (seems fixed from up). Can anyone help on how to remove the b pillar so I can understand what's causing this sound? Have u had a similar rattle in your ATS and managed to fix this somehow?