Pontiac Problems? Ask a Mechanic for Answers ASAP
It is the same, as the Heater Case has to be removed to open & remove the Heater Core.Be sure to feel "both" Heater Hoses at the Firewall, with Engine at operating Temperature & Heater on High Heat, & see if they both feel equal.If so & the both are hot, then it could be the Air Door, Air Door Actuator or Mode Valve, all located at the Heater Case, behind the dash
Here is repair on air temperature actuator
Labor calls for apprx 3.5 hours
Here is what Book shows
Is it worth trying to replace the Thermostat to make sure that is not affecting it?
I am definitely not over-heating but it does take some time for the engine to warm up to normal temp on cold mornings. IS there any fuse that could affect this as well that I could replace?
Prior to replacing Thermostat, you may want to have the Temperature checked at Engine Operating Temperature.Also, checking ther Heater Hoses for equal Temperature.The Actuators are powered & controlled thru the Control Module
Well I ended up flushing the heater core and my heat is back in full force.
Thanks for all the info.