Where do I fill the coolant on a 93 jimmy - 1993 GMC Jimmy

it could be that the regelater is kaput ,take alternator off and take to electical garage such as LUCAShave it check before you damage your electrics????****

Im pretty sure its under the dash, right under the glove box. Should have a cover over it which could be why you cant see it.

You need to get or rent a coolant system tester and identify where it is leaking from. They are very simple to use. You just remove your radiator cap and install the tester and pump up the cooling system and then you watch for where the coolant is coming from. Look closely at your water pump, intake manifold gasket, radiator, heater hose coupler on the intake manifold, and coolant hoses. Those are all the common leak areas.

I suspect a bad head gasket or intake,if you lost
coolant. It had to go somewhere.
Stop using it,until diagnosed and resolved

Hope this helps, it it does please leave feedback and vote Thank You and Good Luck

Removal Procedure

1. Remove the air inlet duct.
2. Remove the necessary coolant from the radiator. Refer to Draining and Filling Cooling System.
3. Remove the upper radiator inlet hose.
4. Remove the coolant outlet bolts.

1. Remove the coolant outlet from the lower intake manifold.
2. Remove the thermostat gasket.

1. Remove the coolant thermostat.
2. Clean all the sealing surfaces of the coolant outlet.
3. Clean the sealing surface on the lower intake manifold.

Your coolant level is low, and you hear the coolant taking up the vacant areas....bubbling...due to low coolant.

probably not. 93 was the change over year from vacuum operated to electronic.

You should see heat well prior to this heat, is your coolant level exceeding low? I have seen situations where the coolant level is so low it will not get to the heater until it warms up (by warming up the coolant has expanded thus filling up the heating system more.
I hope this may have helped,
Tom

If the Blazer is the same Year. I think the years are 1992 to 1994 will work as long as it's the 4L60E, and you have the manuel transfer case to activate the 4WD.
Good luck and keep me posted.

Find the 2 hoses that go into firewall, for heater core, remove them & join together with a piece of copper pipe or similar & top up your coolant, you should be o.k.