its a valve to let the air out of the system
The cooling system bleed valve, on your General Motors 5.7 liter engine, is located on the bottom of the radiator. The bleed valve should be in the middle of the radiator bottom.
no air bleed valve. all you need to do is to remove the radiator cap and let the car idle for a few minutes.
The first step that you can take to fix a radiator is to see if it needs to be bled. To bleed a radiator you will need a radiator bleed key. Unscrew the valve at the side of the radiator and when the first drop of water comes out, close the valve again. If this does not fix the radiator you will need to call in a plumber.
Yes - at a low point
Get underneath your vehicle and look for a wing nut valve on the buttom or side of the radiator, and loosen it.
On the bottom of the radiator it a purge valve
at the bottom of the radiator either side
on the top radiator hose.
google it, it should help you. who do you think people who answer this, get there answer from.
squeeze bottom hose, undo bleed valve on right hand side of radiator to let air out
there is a pee-cock "valve"on the bottom of your radiater. If you are trying to bleed the air from the system while filling the radiator. Where the top radiator hose connects to the engine just to the left of the intake there is a bleed valve. Take a 12mm socket and loosen this a couple of turns. When coolant starts to run out, tighten this valve (do not overtighten they break easily)
The bleed valve on the radiator is on the lower, passenger side of the radiator on the side facing the engine. On my truck, it is tucked away above part of the frame. The bleed valve on the engine block is also on the passenger side of the block, close to the middle and a little further back towards the cabin. To be honest, that one is hard to get to.