How can a bleed a cooling system in a GM?

Answer by  mt8267 (18)

Fill with water/coolant and make sure that when you get the car running to leave the valve that is located near the thermostat open. The air will escape and the moment when there are no more bubbles visible or the fluid comes out, you're done.

Answer by  Teaberry (846)

Take off hoses, open the radiator where the thermostate is located. Add water to the radiator and allow the system to circulate. Do this while the vehicle is running.

Answer by  Amber40 (24961)

First top of the radiator with coolant. Then let it run and you should see bubbles come out. Continue to add fluid until all the bubbles stop.

Answer by  doc325 (454)

First fill the cooling system and see if there is a vent(usually located at the highest point of the motor. Open this vent until coolant and no air comes out.

Answer by  ArunVivek (143)

If you need to Bleed a cooling system,you can find a bleed screw in the thermo housing please unscrew it ot pulling the thermostat & filling it.

Answer by  VickiSann (11)

Raise hood,use portable fan cool engine down. Slowly remove radiator cap, locate petcock on lower left side of radiator. Place large collection pan to catch fluid. Open petcock value using pliers turning counterclockwise. Fluid will drain completely.

Answer by  Amber40 (24961)

Start by filling the radiator up with the coolant. Then start the car up with the radiator cap off. The air should bubble out. Run it until the bubbles stop.

Answer by  tkarlav (1502)

hile running the vehicle there is a theaaded fitting on the engine block near the thermostat , open that valvetill water runs out

Answer by  Gaur (7676)

Bleeding the brake system after changing the brakes can be hard on some anti-lock braking systems. The good news is that on some GM vehicles,scan tool isn't needed to bleed ABS brakes. A scan tool is only needed with a DBC-7 anti-lock braking system,then only if air entered the ABS modulator during brake service.