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Posted on Jul 04, 2010
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How to drain radiator - 1997 GMC Suburban

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  • Master 335 Answers
  • Posted on Jul 04, 2010
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Hello. on the drivers side of radiator is a drain. here is a picture and the instructions for draining the coolant out.



  • Install a tube on the radiator drain. Place the end of the tube in the drain pan.
  • After the engine cools down, remove the radiator cap.
  • Completely open the radiator drain ****.
  • Allow the coolant to drain from the system until the flow stops.
  • Place a drain pan under the block drain hole plug.
  • Remove the drain hole plug from the engine block.
  • Allow the coolant to drain from the block until the flow stops. There may be more drainage from the radiator at this time.
  • Install the block drain hole plug.
  • Close the radiator drain ****.


  • how to drain radiator - 1ab38d9.gif

    Stan Ford

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    • GMC Master 3,131 Answers
    • Posted on May 13, 2015
    Stan Ford
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    With the engine cold , open the drain tap on the lower radiator tank, remove the cap let it drain, disconnect a heater hose, turn the heater on to the hot position, fit a water hose to the heater hose and flow water through the heater radiator till the water flows clear, refit hose and close drain tap, refill with coolant, run engine with radiator cap off, coolant level could drop when thermostat opens, top up with coolant, don't forget the expansion tank coolant.

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