Question about 2002 GMC Yukon Denali
Help my 2005 denali is overheating, replaced thermostat and water pump and problem persists I haethe truck at GMC and they belive there is air in system or head Gasket needs to be replace can you please advise
Start it cold with rad cap off, and heater on high heat, and let it run until you see increased flow in radiator, indicating thermostat opened & engine reached operating temperature. Rev engine slightly every once in a while and hold it there for 10-20 seconds, just to help purge air better/faster. Watch rad flow again, and wait until you see increased flow 3 or 4 times. Then top up coolant in rad to an inch or 2 from top of rad, and put cap back on. Top up return bottle to appropriate level on bottle & then try it again. If it still heats up, get back to me. Does it overheat at all times? Rad fan is good i take it?
Posted on Jul 18, 2009
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Posted on Jan 02, 2017
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