Question about 1999 GMC Yukon

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My heater won't get hot - 1999 GMC Yukon

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Could be a cooling system problem; Ranges from a leak in the radiator, radiator hoses, coolant reservoir, low coolant, even a bad coolant reservoir cap could cause it. Also water pump is a possibility. If not those, could be a bad blend door actuator.

Posted on Jan 04, 2011

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