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MiniD · 11-23-2022, 10:23 AM

If you have heat on both sides of the heater core then you have flow through the core. Are you sure you're checking the lines into and out of the core? I'm not sure when Chevy started with the bypass line for the heater core.

11-23-2022, 10:23 AM	#9
MiniD Registered User Join Date: Mar 2007 Location: Portland, OR Posts: 108	Re: Zero Heat If you have heat on both sides of the heater core then you have flow through the core. Are you sure you're checking the lines into and out of the core? I'm not sure when Chevy started with the bypass line for the heater core.