Why do I have a grinding sound when I put down the windows? on 2009 GMC Sierra 1500

Every time I go to put down the windows in my truck there is a grinding noise. Could this be a simple fix or is it more complicated?

Asked by for the 2009 GMC Sierra 1500
Noise when raising the window also?
More than likely the 'cable' drive window lift assembly needs to be replaced. They give some problems.
1 more answer , 1 more comment
You might need a new window regulator, the question would be whether it comes with the motor or not.