Question about 2000 GMC New Sierra 1500
Antifreeze is full thermostat looks ok replaced anyway. what else?
After replacing the thermostat I pulled the heater hoses off and blew air through the heater core at firewall. Can only blow in left side as directional valves will prevent opposite. Chunks of stuff came out with coolant. I then put a piece of hose on the left side and shot water through until it came out clear.
Put it all back together and heat works fine.
Posted on Jan 01, 2009
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Posted on Jan 02, 2017
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