Re: Add Factory Tach or Not ?
Can someone post a pic of where the harness comes through the firewall and also show the routing of the wire going to the distributor ?
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1979 C-10 Silverado SWB 454/400 Turbo
1987 GMC Jimmy Sierra Classic
2015 GMC Sierra SLT Z71 (Cayenne Metallic)
2018 GMC Denali HD Duramax (Red Quartz)
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