1999 Chevrolet Silverado 1500 Q&A
1999 Chevrolet Silverado 1500 Question: Heater will only blow cold air. Why will it not get hot?
core could be clogged with debris. blend door motor may be bad as well. take it to a shop and have them check it for you and give you a bid. Roy - mastertech6371
I had that problem..took off the hoses and blew compressed air through core in reverse direction as water several times and now it works. Found that on you tube - This Dude