Question about 1999 Chevrolet Express

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No hot air im sure its the heater core.. how ever where is the back herater core???????

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Were your heater control panel is at the back of the truck(if you have controls in the rear of the truck)is where the heater core is behind the the cover and the hoses connect under the van to the heater core.i`m assuming this is an 8 passenger van with carpet and rear seats.

Posted on Mar 28, 2011

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Something to try. allow the engine to run for 6 to 8 minutes with the heater wide open, then, turn the engine off and reach back and feel the 2 hoses at the firewall that lead to the heater core. If only 1 is hot you do have some blockage, if both are hot then it is circulating properly and your problem lies somewhere else.

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