5 minute swap from the factory connection to this one, saved me a 300 dollar dealer repair, I bought another one to keep in my truck as a spare. 10/10 worth every penny.
1999-2025 Duramax Stainless Heater Hose Connector (119020009)
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The OEM plastic connector on the stock GM firewalls is prone to cracking causing the coolant you'd like to see in your heater to end up on the ground which doesn't really help anyone now does it? This PPE performance unit will last the life of your vehicle making sure you don't have to worry about this part breaking again.
Part Number: 119020009
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1999-2025 Duramax Stainless Heater Hose Connector (119020009)