CLR repair of completely blocked heater core/hose

I immediately knew this was a Chevy before clicking.

I fear my brothers 98 Blazer needs this done on top of replacing the intake manifold gaskets.
 
Originally Posted By: oemjunk
If dexcool mixes with air it turns to paste after a while.


That's the old formula that was in use back in 2002. And likely never changed in this truck, although that's speculation on my part. The Dex-cool of today doesn't do that.
 
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