Factory tach in 91 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**kwmech** · 02-24-2018, 04:32 PM

Looking at putting a tach in my Suburban, but do not want some gaudy looking thing hanging off the steering column. Looking at available parts at LMC using the factory style parts. Tach next to the speedo, and moving the fuel gauge to the lower left corner. Anybody tried this or have a list of pieces and parts.? The price for parts at the moment is about 350. with what I think will work

68Timber · 02-24-2018, 07:46 PM

Have you considered the tach from gmsportssalvage? I think that's the name. OEM appearance and the fuel gauge is in the 6 o'clock position like it was on the heavy duty trucks of the era.

**kwmech** · 02-25-2018, 03:07 AM

Similar thing I am looking at in the LMC catalog. Just wondering if anybody has done the same thing and what the results are/ were

Ski-me · 02-25-2018, 01:09 PM

If I were going to do it again, I might try the one Timber suggested. I pulled it up and they now have a stand alone tach with fuel gauge in lower left.

http://www.gmsports.com/tags/tachometer

When I did it, I didn't want some big thing hanging there either. I found a small one and then did major mods to the cluster to get it to fit properly.

**kwmech** · 02-26-2018, 01:15 AM

I'd like to put the fuel gauge in that spot just like the factory did and have the tach where the the current fuel gauge is.

Irish1941 · 02-28-2018, 01:55 AM

I put a factory tach in my '89. It's tight but a tach can fit in the electronic speedo 90-91 gauge case. Im about to do it to my current '91.
Factory tach is a stand alone gauge. Pull the pins for the fuel gauge from the harness, rewire to small gauge and you're golden.

**kwmech** · 02-28-2018, 07:19 PM

That's the kind of answer I was looking for. I need to pull apart the dash for other repairs and I wanted to do everything at once including a new stereo. What about opening up the hole in the metal plate for the fuel gauge in the lower corner?

Irish1941 · 02-28-2018, 11:17 PM

The metal plate is actually plastic. Exacto knife makes short work of it. Use gauge panel as a guide.
You'll need to drill a hole in the case, behind the fuel gauge to run leads from the main harness fuel gauge HOT. The fuel gauge is direct fit. Uses the clock mounts. Run HOT from the main cluster harness to fuel gauge and run a ground. Done.

We are just by passing the printed circuit to fuel and just running hard wired to new small gauge.

The tach harness passes thru the big fuel gauge you'll be replacing. No cutting or drilling there. GM never change the cluster case.
And tach mounts in same spot as fuel gauge did.
Lots of mis-info out there about how this isn't even possible with TBI, after '86, with 700r4, or with blah blah...works just fine.

Here's a better picture of it.

**Hart_Rod** · 03-10-2020, 01:27 PM

Updates and pictures?

**kwmech** · 03-10-2020, 04:11 PM

Just took these, still resolving the dash pad fiasco

**Hart_Rod** · 03-10-2020, 05:05 PM

Quote:

Originally Posted by kwmech

Just took these, still resolving the dash pad fiasco

Can both tach and fuel gauge be purchased aftermarket?

**kwmech** · 03-10-2020, 08:51 PM

I got them both from LMC along with the tach wiring harness and tach mount. Had to change the power lead connector in the tach harness so it would plug into my fuse block. I also had to create my own small harness for the moving of the fuel gauge. Pulled the wires out of the dash harness and extended them to go directly to the gauge bypassing the printed circuit

Irish1941 · 03-11-2020, 12:00 PM

Told ya it was simple

Looks great. Good job!

**kwmech** · 03-11-2020, 02:40 PM

Wasn't too bad. Cutting out the shell was a little tedious without damaging it as they are no longer available new. But yeah, I think it came out ok.

02-24-2018, 04:32 PM	#1
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,391	Factory tach in 91 Looking at putting a tach in my Suburban, but do not want some gaudy looking thing hanging off the steering column. Looking at available parts at LMC using the factory style parts. Tach next to the speedo, and moving the fuel gauge to the lower left corner. Anybody tried this or have a list of pieces and parts.? The price for parts at the moment is about 350. with what I think will work

02-24-2018, 07:46 PM	#2
68Timber I know the pieces fit Join Date: Nov 2007 Location: MONTGOMERY, AL Posts: 5,523	Re: Factory tach in 91 Have you considered the tach from gmsportssalvage? I think that's the name. OEM appearance and the fuel gauge is in the 6 o'clock position like it was on the heavy duty trucks of the era. __________________ John 79 2wd Blazer (Bruiser) 85 M1009 Blazer (Sarge) build 74 Honda Z50 build

02-25-2018, 03:07 AM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,391	Re: Factory tach in 91 Similar thing I am looking at in the LMC catalog. Just wondering if anybody has done the same thing and what the results are/ were

02-25-2018, 01:09 PM	#4
Ski-me Registered User Join Date: May 2012 Location: Colo Springs, CO Posts: 870	Re: Factory tach in 91 If I were going to do it again, I might try the one Timber suggested. I pulled it up and they now have a stand alone tach with fuel gauge in lower left. http://www.gmsports.com/tags/tachometer When I did it, I didn't want some big thing hanging there either. I found a small one and then did major mods to the cluster to get it to fit properly. Attached Images __________________ - Jeff 89' K5 Blazer, 2.5" lift, 35" tires 04' GMC Yukon XL, 3/4 ton, 8.1L

02-26-2018, 01:15 AM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,391	Re: Factory tach in 91 I'd like to put the fuel gauge in that spot just like the factory did and have the tach where the the current fuel gauge is.

02-28-2018, 01:55 AM	#6
Irish1941 Registered User Join Date: Nov 2012 Location: Los Angeles, CA Posts: 450	Re: Factory tach in 91 I put a factory tach in my '89. It's tight but a tach can fit in the electronic speedo 90-91 gauge case. Im about to do it to my current '91. Factory tach is a stand alone gauge. Pull the pins for the fuel gauge from the harness, rewire to small gauge and you're golden.

02-28-2018, 07:19 PM	#7
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,391	Re: Factory tach in 91 That's the kind of answer I was looking for. I need to pull apart the dash for other repairs and I wanted to do everything at once including a new stereo. What about opening up the hole in the metal plate for the fuel gauge in the lower corner?

02-28-2018, 11:17 PM	#8
Irish1941 Registered User Join Date: Nov 2012 Location: Los Angeles, CA Posts: 450	Re: Factory tach in 91 The metal plate is actually plastic. Exacto knife makes short work of it. Use gauge panel as a guide. You'll need to drill a hole in the case, behind the fuel gauge to run leads from the main harness fuel gauge HOT. The fuel gauge is direct fit. Uses the clock mounts. Run HOT from the main cluster harness to fuel gauge and run a ground. Done. We are just by passing the printed circuit to fuel and just running hard wired to new small gauge. The tach harness passes thru the big fuel gauge you'll be replacing. No cutting or drilling there. GM never change the cluster case. And tach mounts in same spot as fuel gauge did. Lots of mis-info out there about how this isn't even possible with TBI, after '86, with 700r4, or with blah blah...works just fine. Here's a better picture of it.

03-10-2020, 01:27 PM	#9
Hart_Rod ************* Join Date: Apr 2005 Location: Pensacola, FL Posts: 17,827	Re: Factory tach in 91 Updates and pictures? __________________ Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3

03-10-2020, 04:11 PM	#10
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,391	Re: Factory tach in 91 Just took these, still resolving the dash pad fiasco Attached Images

03-10-2020, 08:51 PM	#12
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,391	Re: Factory tach in 91 I got them both from LMC along with the tach wiring harness and tach mount. Had to change the power lead connector in the tach harness so it would plug into my fuse block. I also had to create my own small harness for the moving of the fuel gauge. Pulled the wires out of the dash harness and extended them to go directly to the gauge bypassing the printed circuit

03-11-2020, 12:00 PM	#13
Irish1941 Registered User Join Date: Nov 2012 Location: Los Angeles, CA Posts: 450	Re: Factory tach in 91 Told ya it was simple Looks great. Good job!

03-11-2020, 02:40 PM	#14
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,391	Re: Factory tach in 91 Wasn't too bad. Cutting out the shell was a little tedious without damaging it as they are no longer available new. But yeah, I think it came out ok.



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