water noise, what is it ?


Asked by Jan 18, 2014 at 05:39 AM about the 1991 GMC Sierra

Question type: Maintenance & Repair

my 1991 gmc sierra 50,000 miles has no more heater absolutly no heat and is making a
roaring rapids water noise plz help

1 Answer


Check your coolant level. If it's low, there probably a leak, and this will cause air pockets to be pushed through the heater core (Water sound).

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