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bigdaddy4x4 · 06-08-2021, 08:00 PM

its a fan cooler module relay that runs the front aux.cooling fan that is in front of the radiator it controls that fan when the a/c is running

06-08-2021, 08:00 PM	#2
bigdaddy4x4 Registered User Join Date: Aug 2012 Location: concord ga Posts: 185	Re: What are these in 1986 GMC Sierra? its a fan cooler module relay that runs the front aux.cooling fan that is in front of the radiator it controls that fan when the a/c is running