So I had Best Buy install a Pioneer 4100 NEX last week in my 2013 Malibu LS (sh*ttly monochrome display, no factory amp). Had many, many issues with the install but the biggest is a popping sound from the left front speaker when starting the car. Noticed it sometimes happens when the factory chime comes on but its random. After seven return visits to a few different Best Buys around Las Vegas they couldn't figure it out. I got a refund for the install but that doesn't help with the issue. Found a shop that was willing to try and diagnose the problem for 80$ but offer no guarantees they can. So