Buick Repair Questions? Ask a Mechanic for Answers ASAP
How often do you have the coolant flushed on your car?
Is that 3 heater cores spread out over the last 15yrs, or were they replaced in a very short time between failures?
Ok, 90% of shops will flush the entire cooling system afterwards, but I need to make sure. If they did, then this is a product issue and your shop needs to go thru another source and brand. If they didnt, this needs to be done as there could be an issue with electrolysis and rust flakes damaging the new heater cores.