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73-87 Chevy _ GMC Trucks => Interior & Equipment => Topic started by: breeze on April 03, 2013, 05:07:38 pm

Title: Tach
Post by: breeze on April 03, 2013, 05:07:38 pm

is it rare to have a factory tach where normally u would have a fuel gauge? and I mean the big gauge beside the speedo. I have had several silverados and none with this setup, just this one 83 c10. curious!

Title: Re: Tach
Post by: breeze on April 03, 2013, 05:51:18 pm

here ya go.

Title: Re: Tach
Post by: Jason S on April 03, 2013, 06:54:23 pm

A factory tach is not exactly rare, but it isn't real common either.  They are very commonly swapped into trucks that did not have a factory tach.

I may be wrong, but based off the lettering on your tach/speedo, I think the tach in your photo is  from a late 70's GMC/Chevy truck. 

(https://lh5.googleusercontent.com/-ukBspvHAlUk/TrGlb1oMTiI/AAAAAAAAAAk/EJskoK08DY0/s400/DSC00614.JPG)

Title: Re: Tach
Post by: breeze on April 03, 2013, 07:03:26 pm

could have been put in I guess later, im not sure because im not the original owner. thanks for the info

Title: Re: Tach
Post by: bobcooter on April 03, 2013, 08:58:02 pm

I don't recall ever seeing one...

Title: Re: Tach
Post by: mrnapolean1 on April 06, 2013, 10:11:50 am

I would like to have a factory tach but I cannot find one for an 87 R10.

Title: Re: Tach
Post by: Irish_Alley on April 06, 2013, 05:11:36 pm

you would also need the circuit board behind the cluster to match and wire harness to match i think

Title: Re: Tach
Post by: breeze on April 06, 2013, 05:14:44 pm

that's why I thought mine was factory because it has all that but I guess its easy to buy and install.

Title: Re: Tach
Post by: bobcooter on April 08, 2013, 02:34:54 am

It looks really good.  :)

Title: Tach
Post by: 86silver on April 10, 2013, 05:11:36 pm

I just did this.  Found an '80 cluster, bought a new circuit sheet for the back (factory tach version) and tach wiring harness.  The factory tach has nothing to do with the circuit sheet on back of cluster.  The wiring harness for it is 3 wires, ground/12v power/distributor.  That's it.

Buy a new gas gauge (small style) and big tach...you'll be set.


JH

Sent from my iPad

Title: Re: Tach
Post by: Captkaos on April 11, 2013, 01:45:29 am

That didn't come in your truck, 1983 trucks had a 85mph speedo and completely different font.  That is a 1978-1979 cluster.

Title: Re: Tach
Post by: breeze on April 11, 2013, 07:28:58 pm

darnit! I thought I had sumthin special  :o 

Title: Re: Tach
Post by: 86silver on April 15, 2013, 08:13:03 pm

After all of my messin around here's my final result.

Title: Re: Tach
Post by: dalefan613 on June 29, 2013, 10:42:31 am

I want to do this to my 75 so I get the tach the harness and the small fuel gauge and put the fuel gauge where the clock is. Do I still need the circuit board or can I just take the fuel gauge wiring and hook it up to the small fuel gauge

Title: Re: Tach
Post by: sphinx on June 29, 2013, 05:34:51 pm

Dalefan613,

You can add the tach and add a small fuel gauge.  You just have to wire the fuel gauge from the circuit board (not really a board more like a plastic foil).  The tach has its own wiring and does not connect to the circuit board.  Check out my notes in this post, page 2, for some pics of how the tach fits in a non-tach dash.  http://forum.73-87chevytrucks.com/smforum/index.php/topic,25150.15.html (http://forum.73-87chevytrucks.com/smforum/index.php/topic,25150.15.html)