My front heater blows cold air.I think the heater core is pluged.1 hose is hot and the other is just worm. I was wondering if I could just blow it out?
Chevrolet Q&AAsk Your Question
2000 Chevrolet Suburban 1500 Question: Heater blows cold air
Oakman January 05, 2010, 13:34Master
I don't think you will have much success "blowing out" the heater core of your 2000 Chevrolet Suburban 1500. The best bet when having heater core issues is to replace the failed part. You can try "back flushing" the heater core using a garden hose - careful with the pressure! Just be mindful of how you dispose of the coolant if you decide to try flushing or replacing the heater core.
Answer #2Shadetreejr April 11, 2011, 14:26Rookie
I had success flushing the core by reversing the flow of water. I put the hose on the outlet/return side of the core.
Answer #3sfreitas20 December 23, 2012, 10:30Rookie
We had the same issue. The rear heat blew out really hot and was almost enough to heat the whole truck, but the front was just blowing the cabin air around and not heating it at all. I flushed it out with low pressure water in the opposite direction direction of normal flow. The fluid that came out originally was really nasty so I flushed until the water coming out was clear. I put the hoses back on and fired up the truck and as soon as the engine was hot the front heat was also hot. Now both front and rear work great.
My truck is a 2000 Suburban 1500 and this was much cheaper than the $91 heater core from the auto parts store.