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
2 answers 3 comments
Noise when raising the window also?
More than likely the 'cable' drive window lift assembly needs to be replaced. They give some problems.
You might need a new window regulator, the question would be whether it comes with the motor or not.