Posted 10/23/2025 16:47 (#11410600 - in reply to #11410522) Subject: RE: Thanks NAT, Indy and others were right
I fixed at least 100 GM vehicles with no heat by flushing the heater core. 99% of the time, coolant looked good and saw nothing come out of the core when flushing but when you got done, could bake a cake in it.
INDY