GM's are junk, old technology, lousy interiors, push rod engines, patch jobs, and GM & their network of crooked dealers don't stand behind their product. I had a late model Camaro and dealer / GM wouldn't do squat to honor warranty / address complaints. I ended trading it much to my relief. I will NEVER own a GM product as long as I'm alive. My 13 GT500 has been flawless so far, don't know about the 15 yet, haven't test driven it yet.
13 Shelby GT500 - SVT Perf Pak - SVT Trak Pak - Electronics Pkg w/NAV - Leather Recaros - JL Audio Stereo Upgrade