you have to take the dash out.it's a big project.
Remove the water supply hoses from your 1992 Chevy S 10 pickup truck heater core. Remove the heater core retaining bolts. Reverse the process to install your new heater core.
Drain the water from your 1994 Chevrolet Blazer cooling system. Remove the heater core water supply hoses. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
What are the steps to change the heater core on a 1991Chevy S10 pickup ?
With proper tools and knowledge, 4 hours, 5 hours if it has ac.
Probably around $500 or more if you have AC.
If coolant is leaking inside your cabin, you have a leak in the heater core. The only repair is to replace the heater core. Most auto parts stores sell them.
Replace the radiator cap and be sure the coolant reservoir is kept full to the line, it will bleed itself.
A replacement heater core would cost aprox $35.
i have a 93 s10 blazer and had to replace the heater core recently, it is a pain, and it helps to have another person there to give you a hand, you have to take the entire dash out, remove the heater core cover, undo the brackets and undo the hoses from the heater core, the worst part is removing the dash and remembering where all the wires go if you do this job yourself i sugest taking pictures as you go along