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Sterling · 01-30-2013, 10:10 PM

Did you get the small fuel gauge for trucks with factory tach? I'm pretty sure they fit right up. GM is all about cost cuts, 2 instrument trays is not GM like.

Does your new tach have 3 posts sticking out the back? The fuel gauge is 3 posts, one hot, one ground, and 1 for the sender feed. So if yours is 3 posts too, I bet the new circuit makes the sender feed into tach feed, so it should slip right in!

Best of luck with the set up! Also check your distributor where the ignition wires come out the side of the top. One of the posts is labeled TACH, if there is no wire going to that post, you will need to run a TACH wire to your dash circuit or however you wire this up.

01-30-2013, 10:10 PM	#2
Sterling Registered User Join Date: Oct 2012 Location: St Charles Illinois Posts: 26	Re: Quick question about factory tach Did you get the small fuel gauge for trucks with factory tach? I'm pretty sure they fit right up. GM is all about cost cuts, 2 instrument trays is not GM like. Does your new tach have 3 posts sticking out the back? The fuel gauge is 3 posts, one hot, one ground, and 1 for the sender feed. So if yours is 3 posts too, I bet the new circuit makes the sender feed into tach feed, so it should slip right in! Best of luck with the set up! Also check your distributor where the ignition wires come out the side of the top. One of the posts is labeled TACH, if there is no wire going to that post, you will need to run a TACH wire to your dash circuit or however you wire this up.