I just picked up an '05 Yukon XL two weeks ago and I love it. In the last few days the drivers side rear doorlock has been making a lot of noise when it actuates by the key fob and pressing the lock or unlock button. I'm afraid it might be ruining the actuator or something else. Is there any way I can quiet it down and prolong the life of the actuator? I'm thinking about taking the door panel off and lubricating all the moving parts. Thanks in advance!