81+ tach wire firewall location - The 1947 - Present Chevrolet & GMC Truck Message Board Network

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81+ tach wire firewall location

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01-02-2023, 12:20 AM	#1
Morgsie Registered User Join Date: Apr 2005 Location: BC, Canada Posts: 122	81+ tach wire firewall location Does any one have any pictures or info on where the tach harness goes through the firewall on the 81-87 trucks? I found a pic for 73-80 and it looks like it is to the right of the cruise control hole in the firewall (from inside the cab). also, anyone know what size hole it is? Attached Images

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