What are the best Chevrolet repair shops?
RepairPal Certified shops can diagnose and repair your 2004 Chevrolet Express 1500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
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I looked on the firewall and found 2 hoses one is bigger than the other, to me they look like they are part of the heater they are both 90 degree hoses. I think the drain would be the smaller one but am not sure. they are both side by side, so could someone tell me which hose it would be....