Question about 2003 GMC Yukon XL
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
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Oct 02, 2015 | 2003 GMC Yukon XL
Sep 09, 2015 | Cars & Trucks
May 16, 2011 | 2003 GMC Yukon XL
Mar 24, 2017 | 2003 GMC Yukon XL
Check your radiator fluid level, if it is low it is a good chance your heater core or the hose to the heater core has a leak. The heater core is a small version of a radiator which has the air from the blower blow across it to force warm air into the cabin of the vehicle. You will need to probe under the passenger's dash to locate the leak.
Nov 16, 2010 | 2003 GMC Yukon XL
Jan 17, 2010 | 2003 GMC Yukon XL
Dec 05, 2009 | 2002 GMC Yukon XL
386 people viewed this question
Usually answered in minutes!