Good day, ladys and gentleman.

I drive a Tahoe 2010,LT. This baby is in North Caroline, it just star to chill out here. My AC work perfect, i try to set my heating, and is blowing cold on each of the vents on the vehicle, i don't see problems with actuators is just does not heat.
any suggestions please, will be welcome.
thanks

 

Tahoe - Have you checked your coolant level? If it's okay, then I would venture it's your heater core. Not familiar with your vehicle, but if you're lucky you can reach it under the dash. Since it's relatively new, I seriously doubt it'll be that easy.

 

I agree I would start with coolant level, then start looking at heater core or water valve if it has one.

 

Coolant level good. They just change thermostat. Still cold air. Ill be looking at core now
.thanks

 

how did you verify proper operation of the temp blend door and actuator? If it was mine, I would either watch the door counts with a scan tool or get my head under the dash to watch it move. I would do that before looking at the heater core.


do you get any heat when holding the rpms at 2500 after the vehicle has reached operating temp.