My regular cab 2014 Silverado has a whine coming from behind me as you drive down the road, ceases with taking your foot off the gas, returns as soon as your foot gets back into it. Easy to tell it is coming from behind your seat in a regular cab. Truck just today rolled only a little over 1900 miles, way too soon for this kind of nonsense.
I was thinking of doing this before the truck gets a lot of road time, but the factory undercoating is pretty fragile; so haven't pulled the trigger yet.....
I put the rear wheel well liners in my 2014 Silverado, GM part #22998786, the day after getting it home. I had them on-hand before the truck was even in the driveway. As it turn out, the front already had them, so now things are squared away at all 4 wheel wells. They were $102 from a dealership out of Phoenix selling on Ebay.
Would anyone happen to have a shot showing the removal of the seats? I have a newly-purchased 2014 Silverado regular cab WT, and I plan to install carpeting in place of the rubber mat currently in the truck.