Question about 1988 Chevrolet K1500

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Hot coolant not getting to Heater Core.

I think the previous owner messed up the plumbing in the engine cooling system. I would like to find a diagram of the cooling systems piping for an '88 Chevy K-1500 V8 350 4x4

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Some 88 chevy hawe valve on top of intacke manifeld and operate on vacum shot of valve for heat,aplay vakum on and se if working.yu hawe to tach both hoses wat going in to heater box mast be hot ven engine runing,if are not hot problem heater core

Posted on Mar 13, 2009


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There a a couple of possibilities

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Try this link for a free manual:-

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