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checked antifreeze level???
How do I replace the heater core in a Chevy express 1500
Check your fuses!
we changed radaitor & thermastate , now heater blows cold air
replace heater core in a 1991 Chevy work truck 1500
It does not have one.
No, a clogged heater core will not make it overheat. A leaking heater core will.
heater core
Thermostat stuck open, heater core clogged, or the heater temperture control vlalve is defective.
Flows into the vehicle over the heater core.
This frequently happens when the heater coil is going bad.
Check with meter or test light if you have power to fuse block.