There are two block drain plugs, one on each side of the block, close to the motor mounts and oil pan.
Disconnect the lower coolant hose.
What does your owner's manual say to use? If low silicate is not listed then drain and refill with the proper coolant.
There is a drain plug located on lower left side of radiator directly below radiator cap. Position a collection pan on floor below drain plug. Rotate drain plug counter clockwise until coolant flows freely from radiator.
The radiator does not have a drain. You have to siphon it out or pull a hose. I don't know about the block one.AnswerI have a 1999 4wd suburban, and yes it has a drain on the radiator. When you face the engine, standing in front of the truck, look down on the side of the radiator cowling. You should see the drain under the transmission line where it enters the radiator. The only way I could reach mine was to remove the radiator cowling and use a pair of needle nose pliers to turn the pet cock valve to drain the radiator.
Should be at the bottom of the radiator.
if you are talking about the coolant drain hose there isn't one on this model.
if coolant is ok!! then check coolant sensor.
the cooling system is a pressurized system with the radiator cap designed to release pressure and expanded coolant into the overflow can. there is a drain however, look at the bottom of the radiator on the passenger side for a wingnut, loosen it and the coolant flows out.
2.5 gallons.
To change the heater core on a 1999 Chevy 4-wheel drive, first remove the dashboard and drain the coolant. Unbolt the core from its mounts and remove the dash panel to be able to change the heater core.
LOOSEN DRAIN NUT ON RADIATOR LET WATER DRAIN TIGHTEN NUT REFILL WITH COOLANT M
there is a big plastic screw on the bottom right side of the radiator easily accesable from the bottom just unscrew that and it will begin to drain but i wouldn't recommend you removed it completely just enough to let the fluid drain freely