1991 GMC Sierra "heater core gets air locked" Questions

...heater core I have a 3500 5.7 motor is there any thing I need to know if I am doing it my self is it ok to by pass the core how long can I drive the truck if I did that it is ok to by pass the heater ...

...heater core and raise the hose up high . Fill the rad until coolant comes out of the heater core pipe. Carefully reattach the heater hose. Fill the rad slowly allowing trapped air to escape.This may ...

...heater core to get "air locked" Check your coolant level. There could also be a problem with your water pump not able to pump correctly due to a worn or corroded impeller. This will usually cause the ...

heater core (dex cool is notorious for plugging these up). There is a TSB for cracked cylinder heads from GM for unexplained coolant loss.Remove drivers side valve cover, and look at center three head

...heater core. Flushed it and I still don't got any heat in the car it just blows cold there could be a air lock in the cooling system and the heater core is full of air bleed the air out or have an ...

heater core. You have to bleed all the air out of it to get it to work right. Check out your owner's manual on this, it should tell you exactly how to do it. Hope this helped you out. LabRat was right

...heater core isn't plugged. The Jeep isn't overheating, just won't blow hot air inside the cabin. Thanks... coolant probles the heater blows hot & then it will blow cold air changed thermostat&flushed ...

...ac core only blows cold air but You must be talking about the heater core.. In which case I would suggest that you bleed the air out of the coolant system as there is an air lock in the heater

...gets warmer but never hot Check water level in radiator, could air locked Its probably a blend door actuator or plugged heater core. If it's the heater core you will probably want to bring it to a ...

...heater core. After fillling the coolant I bled all the air out that I could thru the bleeder screw at the thermostat housing. However I had no heat. Pulled the cover back off and the core was cold ...