It can be that your coolant level is low, your thermostat is stuck, the actuators are sticking...
how to replace a heater core in a 1997 Chevy blazer
were is the heater relay on1996 jimmy?
Same as a 96 blazer go here.How_do_you_replace_the_blower_motor_on_a_1996_Chevy_blazer
To many steps to list here, would recomend purchasing a shop manual if you intend on replacing that heater core yourself.
yup
Behind the dash assembly, big job for the faint at heart.
your heater core is going out, you need to replace it before it ruptures.
Thermostat stuck open, clogged heater core, heater flow valve not functioning, or low of coolant.
Not a fun job. If your looking to replace the heater core it requires removal of the entire dash and steering columm. I would suggest purchasing a shop manual for that vehicle to help you step by step thru the job.
The high speed relay for the blower motor would be found under the hood, on the passenger side of the firewall, close to the blower motor speed resistor.
why is my 1997 chev blazer over heating
1995-1997