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GMC Yukon, Yukon XL Door Locks
I just discovered a problem of when I lock my doors with with key FOB or manually, that the back hatch and window won't lock. Sometimes when the doors are locked and go to open the back hatch the security alarm will start ringing. I just simply can't lock the back entry way at all. I've looked at the fusebox but can't see which fuse I should be looking for? Any help would be much appreciated. Thanks.