I know GM has the technology. We had a 2003 Yukon XL Denali with front and rear air up until recently. The A/C in that rig rocked - it could cool down that cavernous, many windowed interior right now and keep it nice it the hottest weather. Best A/C in a vehicle I've ever had.
had the enclave for a couple of days now .
i live just outside of philly and it hit hi 80s and the air works
incredible .I'm an air junkie and i actually had to turn it down after 2minutes
it's very powerful throughout the whole vehicle
im just greatful for the tri zone climate control cause i freeze my kids out in our volvo... they usually both sit in the back and there is no climate adjust back there heheheheh... they keep a blanket in the car. sunshine, rain, sleet or snow my a/c in running.