I have a 2004 Yukon. The airconditioner blows cold air on the driver's side and warm air on the passenger side. The a/c also makes a rumbling sound on occasion. I can't associate the sound w/ anything specific...but it does stop when the a/c is then turned off. Any thoughts/
OK, do you have 'zoned' cooling where the passenger side can have a lower or higher temperature depending on a setting on the heating/ventilation/a/c console?
This is the way my Cadillac Deville is, it actually has a knob on the passenger side for the passenger to control temperature.
Good luck on this.
Also, make sure the system is charged up fully with r134a.
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