0682viking

I have a 2013 Silverado extended cab LS 23000 miles. I noticed that when I am traveling and have to stop at a light or stop sign, then take my foot off the break it almost sounds like that the vehicle behind me hits me. The faster that I stop and take off the louder the sound and the harder the pop, vice versa the slower I stop the softer the sound and the pop when I take my foot off the break. The pop and sound only happens when I take my foot off the break to accelerate. I have not taken my truck into the dealer yet to find out what is going on. It almost seems that something slides forward when you are breaking then when you take your foot off the break and take off it slides back.