Chevy Tahoe 2000 .Ok my front heater stopped working, I checked the blender it's ok I checked the fittings at the fire wall blkhd left is hot right is cold both heater hoses are hot before the T fitting In front of the fire wall guess this is for the rear air . Any ideas ?

 

Welcome to the forum. Moved your post to Tahoe section.

Unless there's a heater water valve, my guess is a clogged heater core. Does rear heater work?

 

Check your radiator when its cold if the coolant looks cloudy or opaque it could very well be a clogged heater core....