What am I hearing! Bubble sounds - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-01-2010, 07:45 PM   #1
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Default What am I hearing! Bubble sounds

Hey guys, lately I have been hearing a gulping/bubble sounds from under the dash near or at the heater core....I don't hear it when the cars running, only when its off....When I shut off the car, you can hear this sound for a good 2-3 minutes and then it goes away.......The Bonnie runs great.....No overheating and no coolant loss at all.......It sounds like there is air in the cooling system.......Thanks Ryan
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Old 03-01-2010, 07:50 PM   #2
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that should just be the heater core draining or settling check your coolant level and make sure it is filled to the cold line when cold or the hot one if it'* hot
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Old 03-01-2010, 08:02 PM   #3
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Check to make sure the EVAP drain is draining.
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