no heat on 1996 Oldsmobile Bravada

No getting any heat. I put in a new thermostat,does not overheat, water pump is working, had the heater coil flushed twice. Please help me in what other options I should look at.

1 answer
If you have a hot hose going into and coming out of the heater core, then you have a problem inside the vehicle, like a temperature blend door issue.