Hi Scotty! Love your channel although I don't always agree with your comments on GM.
My son's van has no heat. The blower works but blows cold air. I have replaced the blower actuator door, thermostat and finally the heater core. (What a job! Did it myself).
The coolant is topped off. I don't know what to do next. Any ideas?
Is there hot coolant flowing through the heater core? If so the blend door is probably not working.