Question about 1999 Chevrolet Blazer
I have heard several heater cores gurgle on these. Usually the noise is most noticable when accelerating and will sound like it's coming from the right side of the dash ahead of where the passenger sits. If this is it it can be very difficult to get it to completely stop making this noise [and we've tried many different tricks to do so] It doesn't hurt anything but is annoying. The test we use to see if this is what's making the noise you are hearing it to temporarily bypass the heater core by disconnecting the heater hoses and looping them together under the hood and driving the vehicle for a day or so. If the noise is gone you've got your culprit. If not then at least you've eliminated a suspect. Hope this helps a bit and good luck!
Posted on Jul 08, 2010
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Posted on Jan 02, 2017
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