Now that it's finally gotten hot enough to use the A/C, I've noticed some issues with mine. On my 2005 z71 Tahoe, with the digital dual climate control up front, while driving the air on the driver's side will get blistering hot and eventually cycle back to cool. While the passenger side (even though set to the same temp), and the rear zones stay blowing ice cold. Initially I thought it was low on freon, but with only one zone being warm I don't think that to be the case. Has anybody else ran into this issue?