How many pounds of freon 2009 acadia with rear ac?

The 2009 GMC Acadia with rear air conditioning typically requires about 2.5 to 3.0 pounds of refrigerant (R-134a). It's always best to check the vehicle's specifications or the under-hood label for the exact amount needed for your specific model. Additionally, for accurate servicing, it is advisable to have the system checked by a professional.