Air Conditioner blows hot air - told I need a new blower and evaporator core to the tune of 1700 which also includes all the freon that leaked out. These parts should not go bad on a vehicle less than 5 years old. I see GMC has had a number of vehicles over many years that have had same issue. This is a long standing known issue that warrants a recall. GMC needs to stand behind their products and correct this ongoing issue. I live in Northern USA therefore AC is used only 4 months of the year. Beyond frustrating - 3 mechanics said this should not be happening already.