91 suburban electronic instrument cluster in an Ls swap 86? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MUNCH72 · 01-26-2018, 07:14 PM

Anybody ever use the suburban electronic instrument cluster to get the speedometer to work in an L's swap 86?

**mongocanfly** · 01-26-2018, 07:46 PM

very common...and ive got one in my 91 donor burb that I wish I had when I did my 81

ElGracho · 01-26-2018, 11:08 PM

That's exactly what I have in my 85 with Vortec 4.8. Works great. I have another one for my 84 that's getting a 5.3.

MUNCH72 · 01-27-2018, 12:09 AM

So I can hook the wire from the ecm directly to the speedometer and the speedo will receive the 4000 ppm from the ecm.

ElGracho · 01-27-2018, 08:19 AM

Yes. Look at the pinouts for your year and the year of the cluster here:

http://67-72chevytrucks.com/vboard/s...d.php?t=545416

Make sure the rest of the gages are wired correctly but there are no adapters or anything special required between the ecm and the cluster.

MUNCH72 · 02-24-2018, 10:37 PM

Hey guys. I did the conversion and it worked great for a week and then the speedometer strates freaking out. One time you drive it and it works the next time the speedometer will be at zero then goes to 70 then pegged out then anywhere in between. It doesn't seem to be a broken or loose wire. The odometer always works. Any ideas out there.

**mongocanfly** · 02-24-2018, 11:20 PM

sounds like the input from the output....

AustinBelair · 02-25-2018, 09:53 PM

I've been trying to find a mint one for my 87 when I swap. I've passed on a few locally for a great low price but now I need to locate one.

Do you just run the ECM output to the speedo input on the cluster?

Goats86 · 02-26-2018, 08:52 PM

My speedo does the freak out thing from time to time. On mine, it is after sitting a few days or in damp weather. Once the cab warms up or dries out, no problems. I think it is the speedo itself not a connection. It is 26 years old and was sitting in the donor for no telling how long..

ivorton74 · 02-27-2018, 10:59 PM

Where can i find one of these clusters for a good price?

**mongocanfly** · 02-28-2018, 12:52 AM

here's one on ebay....https://www.ebay.com/itm/88-91-OEM-C...ZaVXCt&vxp=mtr
I've got one but I'm not 100% sure I want to sell it....and if I did it would be the whole gauge set........

01-26-2018, 07:14 PM	#1
MUNCH72 Registered User Join Date: Apr 2013 Location: Florence Al Posts: 36	91 suburban electronic instrument cluster in an Ls swap 86? Anybody ever use the suburban electronic instrument cluster to get the speedometer to work in an L's swap 86? __________________ Michael

01-26-2018, 07:46 PM	#2
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,581	Re: 91 suburban electronic instrument cluster in an Ls swap 86? very common...and ive got one in my 91 donor burb that I wish I had when I did my 81 __________________ 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

01-26-2018, 11:08 PM	#3
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,550	Re: 91 suburban electronic instrument cluster in an Ls swap 86? That's exactly what I have in my 85 with Vortec 4.8. Works great. I have another one for my 84 that's getting a 5.3. __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

01-27-2018, 12:09 AM	#4
MUNCH72 Registered User Join Date: Apr 2013 Location: Florence Al Posts: 36	Re: 91 suburban electronic instrument cluster in an Ls swap 86? So I can hook the wire from the ecm directly to the speedometer and the speedo will receive the 4000 ppm from the ecm. __________________ Michael

01-27-2018, 08:19 AM	#5
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,550	Re: 91 suburban electronic instrument cluster in an Ls swap 86? Yes. Look at the pinouts for your year and the year of the cluster here: http://67-72chevytrucks.com/vboard/s...d.php?t=545416 Make sure the rest of the gages are wired correctly but there are no adapters or anything special required between the ecm and the cluster. __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

02-24-2018, 10:37 PM	#6
MUNCH72 Registered User Join Date: Apr 2013 Location: Florence Al Posts: 36	Re: 91 suburban electronic instrument cluster in an Ls swap 86? Hey guys. I did the conversion and it worked great for a week and then the speedometer strates freaking out. One time you drive it and it works the next time the speedometer will be at zero then goes to 70 then pegged out then anywhere in between. It doesn't seem to be a broken or loose wire. The odometer always works. Any ideas out there. __________________ Michael

02-24-2018, 11:20 PM	#7
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,581	Re: 91 suburban electronic instrument cluster in an Ls swap 86? sounds like the input from the output.... __________________ 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

02-25-2018, 09:53 PM	#8
AustinBelair Registered User Join Date: Apr 2005 Location: Austin, Texas Posts: 291	Re: 91 suburban electronic instrument cluster in an Ls swap 86? I've been trying to find a mint one for my 87 when I swap. I've passed on a few locally for a great low price but now I need to locate one. Do you just run the ECM output to the speedo input on the cluster? __________________ My mother is a recent cancer survivor and this truck build is for her

02-26-2018, 08:52 PM	#9
Goats86 Registered User Join Date: Dec 2010 Location: Waxahachie, Texas Posts: 144	Re: 91 suburban electronic instrument cluster in an Ls swap 86? My speedo does the freak out thing from time to time. On mine, it is after sitting a few days or in damp weather. Once the cab warms up or dries out, no problems. I think it is the speedo itself not a connection. It is 26 years old and was sitting in the donor for no telling how long..

02-27-2018, 10:59 PM	#10
ivorton74 Registered User Join Date: Nov 2011 Location: South Dakota Posts: 916	Re: 91 suburban electronic instrument cluster in an Ls swap 86? Where can i find one of these clusters for a good price? __________________ 1983 C10 Silverado 5.3 swap 1974 C10 lwb 5.3 swap(sold)...http://67-72chevytrucks.com/board/sh...d.php?t=614122 2001 BMW 530i 5 speed 2019 Nissan Titan SV Midnight 1979 Datsun 210 4 door 1980 Datsun 120y(back home in Trinidad)

02-28-2018, 12:52 AM	#11
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,581	Re: 91 suburban electronic instrument cluster in an Ls swap 86? here's one on ebay....https://www.ebay.com/itm/88-91-OEM-C...ZaVXCt&vxp=mtr I've got one but I'm not 100% sure I want to sell it....and if I did it would be the whole gauge set........ __________________ 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



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