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How do you replace the heater core on a GMC Sierra?
Install the replacement heater core to the heater case and reconnect the case to the chassis, tightening all screws. Reconnect all electrical connectors that you detached. Reinstall the instrument panel carrier, mode and temperature control cables to the case assembly and the heater hoses to the core.
How do you take heater core out of case?
Unbolt the heater core case screws, working through the fender with the 3/8-inch ratchet and socket. Unbolt the heater core from the case with the 3/8-inch ratchet and socket and take it out of the case. Install the replacement heater core into the case with the 3/8-inch ratchet and socket.
How does a 1979 Chevy truck heater work?
The heater core on a 1979 Chevrolet truck acts just like the radiator on the front of the truck, but it does the job slightly differently. The heater core takes the coolant that circulates from the engine and circulates it through its core. The heat is then blown out with the blower motor through the dash vents.
Where are the heater core tubes on a Chevy truck?
To fix the issue, replace the heater core. The job should take about an hour for experienced home mechanics. Let the engine cool. Open the hood of the ’79 Chevy truck and locate the heater core tubes. They are on the passenger side of the firewall and stick out next to the blower motor box.
How do you replace coolant in a GMC Sierra?
Use a clean container, if you believe you can use the coolant again, although replacing it with fresh coolant may be best. Crawl under the GMC Sierra, remove the drain plug from the radiator, let the coolant flow into your container and then replace the plug.
How does a Chevy Silverado heater core work?
The heater core has coolant lines which connect to it and produce the actual heat. A fan then pushes the heat through the ventilation system and into the cabin. If a heater core gets clogged or the blend door becomes jammed, the unit will need to be removed.
What to do if your Chevy Silverado heater gets clogged?
A fan then pushes the heat through the ventilation system and into the cabin. If a heater core gets clogged or the blend door becomes jammed, the unit will need to be removed. This task is not for the faint of heart and requires the complete removal of the dashboard, including the radio, airbags, and climate control system.