hardly any heat

Asked by GuruDYYVV Aug 12, 2017 at 10:33 AM about the 2003 Chevrolet Silverado 1500

Question type: Maintenance & Repair

i use to have good heat , then last year it started to get less and less . no i have
no heat . could it be that the heater core is blocked ?

2 Answers
22,280

Guru9FSV8 answered 6 years ago

Yes or the heater door actuator is broke. Is car overheating? Stuck thermostat? Low coolant? Air in cooling system? Is blower working? Bad blower resistor?

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Guru9FSV8 answered 6 years ago

If heater core is blocked you can flush it easily. Tell me nobody put stop leak in your cooling system recently? This stuff is horrible! It plugs stuff up that doesn't need plugged. Chrisfix has a video on YouTube how to clean out and unblock a heater core. It is very detailed and works. A few dollars on clear hoses to hook up to the core.

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