Hi, my 99 suburban blow just cold air. I replaced Water pump
, thermostat, heater control valve, I flushed the heater core
and still nothing. looks for me like a low water flow. It is possible?
JA: Has the vehicle ever overheated? And when was it last serviced?
Customer: it was overheated sometime during summer (pulling trailer) and it wasn't in service long time. i thing :)
JA: Are you fixing your Suburban yourself? What have you tried so far?
Customer: yes. I started with heater control valve ( it was broken), then i did flush, fill new coolant, install new water pump and flush heater core. nothing wasn't changed, hoses from engine
are still warm just 3-4 inches from engine. Heater is working just during driving up hill
JA: Anything else you want the mechanic to know before I connect you?
Customer: I'm not sure. That's everything what i did with it.