I have no coolant flow through my heater core, but engine does not overheat.

What is your question?

This is on my 92 Safari, not a 91 Safari! I have flushed my coolant system as well as flushed the heater core. I disconnected the hose from the "Y" connector on top of the water pump and found that there is no water flowing out of the water pump.

How long has your 1992 GMC Safari had this problem?

Several weeks

K Spirson in Corinth MS

Dec 11, 2017

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What are the best GMC repair shops?

RepairPal Certified shops can diagnose and repair your 1992 GMC Safari. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

Popular Answer

I have no coolant flow through my heater core, but engine does not overheat.

What is your question?

How long has your 1992 GMC Safari had this problem?

Several weeks

K Spirson in Corinth MS

Dec 11, 2017

1 Reply

Popular Answer

casey40510on Dec 11, 2017

Hello, That is likely the solution. If the water pump is not pushing coolant, the fins have probably deteriorated. I am surprised that it is not overheating, but that may just be due to the cool weather and engine fan.

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Popular Answer

What are the best GMC repair shops?

RepairPal Certified shops can diagnose and repair your 1992 GMC Safari. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.