Squarebody digital sensing speedo? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Factory Guy** · 01-08-2020, 08:22 PM

Whats everybody here doing for a electronic speedometer if one converts to a modern engine say an LS?

Please DO NOT reply Dakota Digital, or other AFTERMARKET OPTIONS, i really love the design of the stock gauge set up, I have zero interest in switching to aftermarket.

I know you can get an old cluster out of a 1990-1992 Suburban, that is electronic speedo, but is anybody making new printed circuit sheets for those?

Justins76 · 01-08-2020, 09:04 PM

I've seen these boxes used to drive a stock mechanical speedos off a VSS.
https://www.speedhut.com/Speedbox.html

SunSoaked · 01-08-2020, 11:06 PM

Dakota Digital. They have a classic series that look just like the original. Best upgrade you'll ever do. Except maybe Vintage Air.

**Factory Guy** · 01-09-2020, 10:48 AM

Quote:

Originally Posted by Justins76

I've seen these boxes used to drive a stock mechanical speedos off a VSS.
https://www.speedhut.com/Speedbox.html

That looks like an option.

Thanks!

**Wgesnerjr** · 01-10-2020, 07:38 AM

No separate printed circuit for the 90-92 electric suburban clusters. They were made as one part number - meaning back in the day, the whole thing was replaced as a unit. Not rebuilt.
Getting a cluster is expensive. Getting the speedo out without damaging the circuit board plug is nearly impossible.
Once I got mine apart, it was cleaning and painting. I got a new lens (which is available in the LMC catalog for suburbans) to finish it off. Then had to re-pin the plug and bolt up. Not sure if a stock LS PCM is set up for the right signal form the factory. Ask that mine was changed to match the electric Speedo cluster when I sent it out to have the VAT removed.

**mongocanfly** · 01-10-2020, 07:57 AM

on my 81 I used the Dakota digital box with my stock speedometer....ecd-100....https://www.summitracing.com/parts/dak-ecd-100-1/
and am using the same style DD box on my IH build
I also have a elec speedo on the shelf I pulled from a 91 burb I parted out

**hatzie** · 01-10-2020, 11:53 AM

What transmission are you using?
Do you have 4wd?

If you have 4wd you can use a VSS generator inline with the cable from the squarebody transfer case and keep your original speedometer.

2wd with the LS transmission requires a box to feed the speedo or a 1990-92 Suburban or K5 cluster.

01-08-2020, 08:22 PM	#1
Factory Guy Senior Member Join Date: Jun 2019 Location: Midway USA Kentucky Posts: 566	Squarebody digital sensing speedo? Whats everybody here doing for a electronic speedometer if one converts to a modern engine say an LS? Please DO NOT reply Dakota Digital, or other AFTERMARKET OPTIONS, i really love the design of the stock gauge set up, I have zero interest in switching to aftermarket. I know you can get an old cluster out of a 1990-1992 Suburban, that is electronic speedo, but is anybody making new printed circuit sheets for those? Attached Images

01-08-2020, 09:04 PM	#2
Justins76 OutOfMyMind & I'llNeverKnowWhy Join Date: Apr 2004 Location: Another world, some other time Posts: 672	Re: Squarebody digital sensing speedo? I've seen these boxes used to drive a stock mechanical speedos off a VSS. https://www.speedhut.com/Speedbox.html __________________ -Justin-Out of my mind and I'll never know why 1976 Chevrolet Silverado C10 350 4bbl / TH350 Big10 longbed 1986 Pontiac Firebird T-Top 5.0L TPI 700R4 WS6 1992 Pontiac Firebird T-Top 5.0L TBI 700R4 My cardomain page I don't like to save, it's more fun to spend!!

01-08-2020, 11:06 PM	#3
SunSoaked Registered User Join Date: Dec 2011 Location: Yuma Arizona Posts: 1,525	Re: Squarebody digital sensing speedo? Dakota Digital. They have a classic series that look just like the original. Best upgrade you'll ever do. Except maybe Vintage Air.

01-10-2020, 07:38 AM	#5
Wgesnerjr Senior Member Join Date: Jun 2015 Location: Atlanta, GA. Posts: 737	Re: Squarebody digital sensing speedo? No separate printed circuit for the 90-92 electric suburban clusters. They were made as one part number - meaning back in the day, the whole thing was replaced as a unit. Not rebuilt. Getting a cluster is expensive. Getting the speedo out without damaging the circuit board plug is nearly impossible. Once I got mine apart, it was cleaning and painting. I got a new lens (which is available in the LMC catalog for suburbans) to finish it off. Then had to re-pin the plug and bolt up. Not sure if a stock LS PCM is set up for the right signal form the factory. Ask that mine was changed to match the electric Speedo cluster when I sent it out to have the VAT removed. __________________ Jay Gesner Atlanta, GA 1985 C10 Long Bed 4X2 LS 5.3, 4L60E Father/Daughter Project

01-10-2020, 07:57 AM	#6
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: Squarebody digital sensing speedo? on my 81 I used the Dakota digital box with my stock speedometer....ecd-100....https://www.summitracing.com/parts/dak-ecd-100-1/ and am using the same style DD box on my IH build I also have a elec speedo on the shelf I pulled from a 91 burb I parted out __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver Last edited by mongocanfly; 01-10-2020 at 08:04 AM.

01-10-2020, 11:53 AM	#7
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: Squarebody digital sensing speedo? What transmission are you using? Do you have 4wd? If you have 4wd you can use a VSS generator inline with the cable from the squarebody transfer case and keep your original speedometer. 2wd with the LS transmission requires a box to feed the speedo or a 1990-92 Suburban or K5 cluster. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

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