After having to replace a pair of heater hoses on a coworkers 01 Jeep GC 4.0L after one burst on the freeway I'd figured out I'd replace them in my 02 Chevy Silverado. I was planning to just replace the plastic heater core quick connect fittings since they are prone to breaking but since I'm in there I will replace both the hoses and replace the ugly looking coolant reservoir too. The hoses look good from the outside but I'm worried if the interior of the hoses are starting to go bad since the cooling system has never been service by the original owner.
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