Power seat motor
 

The power seat motor/gear in my 2013 GMC SLT is starting to growl when the seat is moved forward or backward. Truck only has 43000 miles on it but the seat moves each time one gets in or out due to the auto feature.
Has any one had to replace the motor or gear drive on theirs? and how much of a job is it? Couldn't find a video on You Tube. Truck is out of warranty of course.