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03-15-2012, 12:21 AM
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#1 |
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GM Addicted
Join Date: Jan 2009
Location: Visalia, Ca
Posts: 2,291
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Re: 7K 73-87 tachs
Yes i got the tach harness with it. Im just trying to get it wired without having to run long lengths of wire, thats why i wanted to get power and ground from fuel gauge, also i want to know if there is a way i could test temp, and volt gauge outside of truck before i install them just to verify they work. The cluster is out of a 77 mine being a 79. i want to move over the brake warning light to the speedometer housing, since my truck is not 4wheel drive i could just swap over the plastics but which wires would have to be moved in the pin of harness?
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 ..Mac’s Garage..73 GMC, 54 Caddy, 2010 Silverado, 68 C10 RIP DAd My 73 GMC Truck Build Pic 2010 Silverado 4/6 on 24s IG:MacsGarage |
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03-15-2012, 09:11 AM
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#2 | |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 7K 73-87 tachs
Quote:
this swap should work
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 03-15-2012 at 09:21 AM. |
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04-12-2012, 04:43 PM
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#3 |
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Registered User
Join Date: Dec 2007
Location: Palmer, Alaska
Posts: 13,821
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Re: 7K 73-87 tachs
Does any one have any experience with a factory diesel tach on a 6.2 diesel engine?
How did the factory run the tach on the big diesels?
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04-12-2012, 05:39 PM
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#4 | |
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Just here to tinker
 
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,689
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Re: 7K 73-87 tachs
Quote:
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(winter unit)https://67-72chevytrucks.com/vboard/...25#post8900725 |
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04-12-2012, 05:57 PM
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#5 | ||
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Registered User
Join Date: Dec 2007
Location: Palmer, Alaska
Posts: 13,821
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Re: 7K 73-87 tachs
Quote:
Diesels don't have ignition coils... Anyone know if the factory tachs will run of the alternator? Quote:
Not me Lol Posted via Mobile Device
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04-29-2012, 06:48 PM
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#6 | |
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Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,689
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Re: 7K 73-87 tachs
Quote:
__________________
78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(winter unit)https://67-72chevytrucks.com/vboard/...25#post8900725 |
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04-29-2012, 09:48 PM
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#7 |
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Registered User
Join Date: Apr 2012
Location: Chatt Tn
Posts: 966
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Re: 7K 73-87 tachs
Man I need to find a complete gauge assembly out of a big truck, with the diesel tach, and the air pressure gauge on the left. that would be sweet in my cummins truck! need to figure out where they're all sitting. never see them anywhere.
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88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535 |
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04-12-2012, 05:29 PM
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#8 |
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Chevy Enthusiast
Join Date: Jul 2009
Location: Canyon Lake Texas
Posts: 2,024
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Re: 7K 73-87 tachs
It should be the same, just 4K instead of 5K.
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Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress) |
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04-12-2012, 07:06 PM
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#9 |
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Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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Re: 7K 73-87 tachs
I ordered the GM Sport Salvage one a few minutes ago. Hopefully it will work in the '91 cluster.
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1974 Jimmy- 5.3/4L80e/NP241 |
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04-12-2012, 08:44 PM
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#10 | |
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Registered User
Join Date: Dec 2007
Location: Palmer, Alaska
Posts: 13,821
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Re: 7K 73-87 tachs
Quote:
Posted via Mobile Device
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04-12-2012, 08:56 PM
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#11 |
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Second Chance Program
Join Date: Jun 2006
Location: Portland, OR
Posts: 2,642
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Re: 7K 73-87 tachs
Subscribed!
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04-12-2012, 10:32 PM
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#12 | |
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Registered User
Join Date: Jun 2011
Location: Baytown TX
Posts: 2,219
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Re: 7K 73-87 tachs
Quote:
http://www.gmsportssalvage.com/?q=node/1316 http://67-72chevytrucks.com/vboard/s...d.php?t=470240
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John 82 Chevy Silverado 350ci/TH350
Last edited by J Knight; 04-12-2012 at 10:41 PM. |
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04-13-2012, 07:20 AM
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#13 | |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 7K 73-87 tachs
Quote:
no pics, they do say it does tho...
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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04-12-2012, 11:50 PM
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#14 | ||
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Chevy Enthusiast
Join Date: Jul 2009
Location: Canyon Lake Texas
Posts: 2,024
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Re: 7K 73-87 tachs
Quote:
Quote:
And yes I do realize that... Look here: http://67-72chevytrucks.com/vboard/s...d.php?t=140436
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Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress) |
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04-13-2012, 07:57 AM
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#15 |
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Registered User
Join Date: Jun 2011
Location: Baytown TX
Posts: 2,219
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Re: 7K 73-87 tachs
The font pictured in the links matches almost perfect with the 85mph speedo but I haven't seen if they have the older font of the 100mph speedo's.
Posted via Mobile Device
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John 82 Chevy Silverado 350ci/TH350
Last edited by J Knight; 04-13-2012 at 08:02 AM. |
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11-15-2012, 03:53 PM
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#16 |
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Chevy Enthusiast
Join Date: Jul 2009
Location: Canyon Lake Texas
Posts: 2,024
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Re: 7K 73-87 tachs
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Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress) |
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11-17-2012, 04:42 PM
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#17 |
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Registered User
Join Date: Dec 2009
Location: Madison, Wi
Posts: 80
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Re: 7K 73-87 tachs
I wonder if anybody has asked LMC to looked in to reproducing the 1980 tach.??
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11-17-2012, 07:22 PM
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#18 |
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Chevy Enthusiast
Join Date: Jul 2009
Location: Canyon Lake Texas
Posts: 2,024
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Re: 7K 73-87 tachs
Whats wrong with the second tach.
__________________
Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress) |
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11-18-2012, 05:43 PM
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#19 |
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Registered User
Join Date: Dec 2009
Location: Madison, Wi
Posts: 80
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Re: 7K 73-87 tachs
I am putting a tach in a 1990 cluster and line the look of the canadian 1980 tach..
Look at the pics from 73-87.com Just a prefrence |
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11-18-2012, 06:51 PM
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#20 |
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Chevy Enthusiast
Join Date: Jul 2009
Location: Canyon Lake Texas
Posts: 2,024
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Re: 7K 73-87 tachs
The 80 canadian tach doesn't look any different then the original 80-87 US tachs, the only thing that looks different is the speedo. In fact it looks just like the 3rd LMC tach but without the redline.
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Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress) |
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11-18-2012, 10:13 PM
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#21 |
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Registered User
Join Date: Nov 2012
Location: BY THE CAROLINA SEA
Posts: 919
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Re: 7K 73-87 tachs
I sometimes wonder how accurate these old tachs are?
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FRANKENTRUCK 1981 Chevrolet C10 Shortbed Stepside GRANDTRUCK 1968 Chevrolet C10 Stepside Longbed http://67-72chevytrucks.com/vboard/s...d.php?t=584617 PROJECT JIGSAW 1967 GMC C3500 GREAT WHITE 1986 Blazer M1009 |
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11-20-2012, 11:00 AM
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#22 | |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 7K 73-87 tachs
Quote:
I ran a second tach for a while saw this one earlier this year,yard wanted 100. doubted it would work,rusted up
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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11-19-2012, 02:24 PM
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#23 | |
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Registered User
Join Date: Dec 2009
Location: Madison, Wi
Posts: 80
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Re: 7K 73-87 tachs
Quote:
Did they have them untill 1987? |
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11-18-2012, 10:56 PM
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#24 |
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Chevy Enthusiast
Join Date: Jul 2009
Location: Canyon Lake Texas
Posts: 2,024
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Re: 7K 73-87 tachs
Pretty accurate once you do the POT mod and sync it with a known good tach.
__________________
Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress) |
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11-19-2012, 02:38 PM
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#25 |
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Chevy Enthusiast
Join Date: Jul 2009
Location: Canyon Lake Texas
Posts: 2,024
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Re: 7K 73-87 tachs
They had them until 91 in the crew cabs and suburbans. Its just the 73-87 site didn't put pictures up after the 80 tach.
__________________
Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress) |
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