Question about 1998 GMC Sierra

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Draining the radiator on my 98 gmc 2500 truck

Opening the drain on the 2500 GMC sieria 1998 radiator its not the old kind and is hard to see howdose it open to drain?

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You have to disconnect the bottom tube to the radiator. Be sure if you have antifreeze in it you drain into a bucket because its sweet to bugs and the bugs will be there in an hour if you dont.

Hope this helps

Posted on Jan 02, 2009


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1 Answer

Where is the radiator drain valve located on 2007 GMC Acadia SLT FWD?

No More Radiator Drain Valves in GM vehicles


Starting in 2003, GM discontinued the use of a drain hose attached to the radiator drain valve. Later, GM discontinued the use of a radiator drain valve altogether. Some models continued to include a drain valve, but the valve was permanently sealed during production. Do NOT try and operate these sealed valves-they will break. GM warns that if you try to remove and replace the valve, debris from the breakage may circulate throughout the system and damage water pump, heater core, and thermostat components.
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How do I drain the coolant in a 1998 GMC Sonoma?


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