radiator drain

2003 GMC SAFARI
142 MILES • 6 CYL • AWD • AUTOMATIC
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DOCTASUDS
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How and where do I access tthe radiator drain on my 03 GMC Safari AWD?
Jan 27, 2011 at 5:15 AM
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RASMATAZ
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Check at the driver side corner of the radiator
Jan 27, 2011 at 6:20 AM
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DOCTASUDS
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I wish it were that easy. It is on my other vehicles. Seems to be a lot of plstic "stuff" under there. No petcock in sight. What do I have to remove?
Jan 27, 2011 at 4:12 PM
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RASMATAZ
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Remove the bottom hose to drain,if you're unable to locate the drain plug
Jan 27, 2011 at 8:03 PM
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DOCTASUDS
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Removing lower radiator hose is a difficult option due to the fact that it is under the AC receiver and part of the air intake system. My 7 year old can't even get his arm down in that space. Underneath is blocked by the frame, and a piece of plastic that also serves as an anchoring point for the power steering cooling lines. I've already removed it thinking I would find the drain but still could not. So... I flushed the system by removing the 5/8" heater hose that is right there on top of the passenger side that goes to the heater core. I connected a water hose to the exposed nipple, and coupled the open line into a catch resevoir. Ran the motor while flushing for 5 min. thru hose and then 5 more with hose blocked and cap off the top of radiator. Had great flow judging by 4" geiser out of radiator top. I can do this becase the thermostat is stuck open. I am driving currently with water and prestone super cleaner. In 2 days I will reflush w/ water, drain by running empty and siphoning the remaining water out of radiator. Then I will fill w/ new 50/50 coolant. I hate newer cars. More and more they are making them so that us backyard mechanics can't work on them.
Jan 28, 2011 at 1:20 AM