bottom of the radiator on the drivers side is a plug. It takes an Allen wrench to open and the antifreeze will drain through the hole just below it
on my 2003mit a wing nut
On the bottom of the radiator on the drivers side is a plastic wing nut you will have to do it by hand you cant get a pair of pliers in there to losen it and when you put it back on just hand tightn it
You have to remove the drain plug that is located near the bottom passenger side, on the side of the radiator. It is a black plastic plug that must be removed in order to drain the fluid.
Should be a plug at the bottom or rear of the radiator
pull the petcock on the bottom of the radiator. it's either on the feft or the right bottom
if you run your engine without antifreeze your car will overheat and ruin the engine.
Empty the radiator - and re-fill it ! Car anti-freeze is added to the water in the radiator so, if you drain it and re-fill it, you can add a fresh quantity of anti-freeze into the radiator filler hole.
=To properly flush the antifreeze on a 2002 Yukon you will need a antifreeze vacume system you will need to start the car and have it running turn on all the heating modules to high and have the car reved at about 1.5 r.p.m, or a little higher to activate the vaccume this will start sucking the old antifreeze out. When the radiator is empty{you will know when it is empty because there will be no more antifreeze coming out}you can then fill it up with half and half antifreeze[half water half antifreeze].=
have the radiator cap pressure tested
you can add antifreeze in 2 places. If engine is cold,open radiator cap and poor directly in.Also there is a antifreeze reservor thatr you can poor it in if it is empty. Remember just add fluid until it comes up to the cold line on resv.
Depending on which engine you have it should take between 10 and 12 quarts to fill an empty cooling system. If you are just draining the radiator, probably 4 quarts. This coolant mixture should be at least a 50/50 mix of anti freeze and clean water.
Your radiator appears empty because your cooling system has a leak.
20 Minutes tops. Empty antifreeze from radiator, take 4 small bolts from the fan cover that is attached to the radiator and scoot it towards the engine, loosen top and buttom hose off radiator, take 2 maybe 4 bolts holding the radiator to the front off and pull the radiator straight up!
If you put the brake fluid in the overflow reservoir just empty the reservoir and pour in a 50/50 mix of antifreeze and distilled water. If however you put it in the radiator itself, I would recommend you drain the radiator and refill. Brake fluid is corrosive and may damage the water pump seal.