It will be on the bottom right corner of the radiator under the hood
Assuming you are asking about the radiator coolant drain, it should be on the passenger side under the lower radiator hose. It should take a 1/4" square drive to open it.
Counter-clockwise to open
Drain the blazer radiator. Refill with water. Open the heat on high, start the engine for a few minutes. Drain the system again Repeat this several times to get all of the old coolant out.
i have a 2002 Chevy blazer 2 door my horn is located right above the right front wheel, right outside the engine compartment. if you are standing faceing the front of the car, look to your left and down, above where the wheel is and youll see it. or open the hood and set the alram off and follow the sound. hope this helps
If you are unable to get the back glass of a 2002 Trailblazer open, you can remove the glass or take the window panel off of the hinges.
Open the hood, locate upper radiator hose, follow the upper radiator hose from the radiator to the "gooseneck" located on the engine, the thermostat is located under the "gooseneck". The "gooseneck" has to be removed to replace thermostat.
If it is a plug -- turn it counterclockwise to remove If it is a "petcock" turn it clockwise to open
I ran out of time on Saturday to do it, but it looks like you remove the battery. Then you can reach down and open the drain plug. It is just below the battery at the bottom of the radiator.
Could be: Low coolant in the radiator - or - thermostat stuck open - or - heater core plugged.
Open the hood and look down at the right inside bottom of the radiator, The right bottom side of tank. It is right there, hard to see.
im not sure but i have a 94 bravada and it has an oil filtre relocator kit on it from the factory, i have to pull my air filter box up to get to it, its probably located close to the radiator, check all the lines coming from the radiator as your blazer probably has an oil cooler in the radiator, hope i helped. sharris@maplenet.net if you have any more gm questions There is an access door on the driver's side just behind the front bumper. It is marked "oil filter". Turn the screw 1/2 turn to open the door and there it is!
I have a 1999 Vemture. Open the passenger front door and there is an obvious small door in the side of the dash!!