Question about 2003 GMC Yukon XL

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How do you find and fill the radiator in 2003 GMC Yukon XL

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Some of these vehicles have a false petcock. Pop off the lower hose over a catch pan, pour a gallon of water in the plastic Dexcool Coolant bottle and put the hose back on when it stops pouring out. Fill to the max line and run the car until both radiator hoses are hot (thermostat has opened). Replenish fluid to max line and cap the bottle. If you have electric fans make sure they come on and make sure your temp. gauge stays in the middle. It'll take longer on cooler days. You might have to get in the car and gas it to about 2000 rpms. Don't cap the bottle until the thermostat opens. If it vomits, change the thermostat and again make sure the electric fans kick on or the clutch fan speeds up at about 210 degrees.

Posted on Sep 04, 2010

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Posted on Jan 02, 2017

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