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Step 1: Disconnect heater hoses from under the hood Step 2: Remove the (6) 9/32" screws securing the heater box cover to the bottom of the heater box. Note: (2) of them are hidden so make sure you get them all. Step 3: Remove the heater box cover. Step 4: Locate the (1) 9/32" screw that holds the heater core to the housing. Step 5: Gently pull the heater core from the housing and remove. Installation is the reverse of disassembly.

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โˆ™ 2008-11-23 21:21:47
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Q: How do you change the heater core on a 1990 Chevy Silverado?
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