Cadillac Escalade, EXT and ESV Forum - 2007-2014 Discussion, High Pitch sound after turning A/C on! in Cadillac Escalade Forums; Just a note to anyone that hears a high pitch sound, like rubbing your finger on a wine glass from ...
- 06-04-13 10:57 AM #1
High Pitch sound after turning A/C on!
Just a note to anyone that hears a high pitch sound, like rubbing your finger on a wine glass from the front right of the dash, you might have a leak in the high pressure side of the A/C. This noise happens about 30 seconds to a minute after the A/C is turned on. Easy fix with a new "O" ring and a full re-charge of the A/C system.
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