Did you check the thermostat to make sure it is working? If it is and you have enough coolant, you might want to check for head gasket issue. You can rent a tester at Autozone. HTH
Bad head gasket or... Crack in exhaust port in head. Check exhaust for presence of antifreeze smell or exhaust gas in radiator.
There can be many causes of overheating. Clogged radiator, stuck thermostat, inoperable cooling fan, bad water pump, defective radiator cap, air trapped in cooling system, and blown head gasket.
The heater core has no gasket. If it is leaking, it must be replaced.
possibly you have a leaking cooling line from your trans cooler or radiator
why is my 1997 chev blazer over heating
Could be a number of reasons. Lack of coolant, clogged heater core, bent radiator fins, bad thermostat, non-functioning engine fan.
how many gallons of antifreeze in a 2003 blazer radiator with a/c
In the front
In the radiator.
Have your radiator tested at a radiator shop, replace the thermostat, and if it was mine I would replace the water pump also. If fluid is leaking from under the front snout of the water pump, it needs replaced. If there is either white slurry in your oil or excess gas and black oil floating on top of your coolant, you may have a head gasket or cracked head causing the overheating. In most cases having the radiator cleaned/tested and a new thermostat should fix the problem.
The radiator drain plug in 95 blazer is a plastic bolt with ears like a wing nut. It is usually on the radiator facing the engine.
It will be on the bottom right corner of the radiator under the hood