There's a Youtube video out there that is fairly good on how to take everything apart to get to the rear speakers. It's time consuming but really not that hard to do. I've replaced mine using another method but you take a real good chance at scuffing up the panels so I'd suggest doing it the "time consuming" way. I did have to remove everything when I installed an amp so that's how I know it's just better to do it right the first time. Just take your time at it.
2014 Ruby Red V6 Premium w/pony package, Magnaflow Street axle-backs, LED license plate light, LED interior lights, Strip LED trunk lights, MMD Hood struts, SCT X4 Tuner with Steeda tunes for life, Boss 302 strut tower brace, OEM extended range remote start, Raxiom Navigation.