I am needing to get my A/C recharge asap, but I do notice that the rear roof vents seem to emit colder air than the front vents? I was wondering if they are all in the same system or is there another system on the burbans? BTW its a 2001 burban. Just curious I guess. Any info will better my own. ---------- Post added at 03:08 PM ---------- Previous post was at 03:05 PM ---------- Also might I ask what people are paying for a recharge? This guy near me wants $320. That seems high, however I could be wrong.