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On all chevys that year 1979-1988 It's Not Fun. Step 1. Remove heater hoses from core under hood. 2. Remove glove box door inside. 3. Take off all 5 heater mounting nuts under the hood. 4.Remove defroster hood on front of heater inside . 5 Gently pull heater unit back and down. 6. Remove all control cables from heater and mark them. 7. Then you can take heater core out of heater casing by removing 4 srews from case where core is. 8. remove front and back retainer straps from core. Reverse to put it back in.

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โˆ™ 2007-12-14 16:12:17
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Q: How do you replace a heater core on a 1984 Chevy pickup C series?
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