The rear liftgate glass whistles when I am towing a cargo trailer with my 07 Tahoe. My dealer is aware of the problem and has told me that GM is aware of the problem and should be issuing an updatedTSB with corrective measures and possibly new parts soon. They have been telling me this for 2 months now! I am getting a bit impatient since I tow often.

Is anyone else experiencing this problem with their 07 Tahoe? Anybody have any scoop on when an updated TSB will be issued???

Thanks.

 

I have the same problem while towing a cargo trailer but I have not tried to get it corrected. I do not tow often. If you do a searchyou will find the post I started in October.
My friend is the service manager at a Chevy dealership, I will have him look into a TSB for this problem.