When our Yukon XL was new we noticed a noise that was squeaking or even sounding like wind noise buffeting round our mirrors. We found a TSB where the rear twilight should to be taken off and replaced and it actually fixed the noise and we have not heard it since. This is one of the few problems that our dealer fixed but we had to give them the fix because they couldn't find it on their own.
A D V E R T I S E M E N T S
When our Yukon XL was new we noticed a noise that was squeaking or even sounding like wind noise buffeting round our mirrors. We found a TSB where the rear twilight should to be taken off and replaced and it actually fixed the noise and we have not heard it since. This is one of the few problems that our dealer fixed but we had to give them the fix because they couldn't find it on their own.
- Jay M., Wetumpka, AL, US