I have a 2015 Colorado and I'm beginning to get a whining noise that sounds like it's coming from the rear of the truck. The noise begins around 45 mph and is the loudest between 50-60 mph. If you ease back on the gas pedal just a little it will "instantly" stop, touch the gas pedal and the sound will "instantly" comes back on again. The Chevy dealer has no idea where the noise is coming from except they believe it's coming from the rear of the truck. They said they could possibly find the problem but they would have to start pulling everything apart starting with the differential which could be costly and no guarantees that's where the sound is coming from. Has anyone experienced a problem like this before or have an idea what could be causing this whining sound?
