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Thread: 1995 C2500 ls1 swap

  1. #61
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    794
    Awesome....so say I swapped in a 96+ cluster, do you happen to know if I can just hook the white tach wire from the new pcm to the back of the cluster? If so do you know what color wire I need to hook to and what pin location it is?

    Here's the only vid I have for now.... Took this right before I did the exhaust. This is open headers and the tune was way off. She smooths out and starts hittin one wicked lick

    http://youtu.be/SXvzvjo7Cg4
    2008 GMC Sierra SLE....370ci LY6 with some goodies SOLD
    1995 C2500- LS1 swap with a mp112
    build thread- http://www.ls1truck.com/forums/lsx-t...-ls1-swap.html

  2. #62
    Join Date
    Aug 2012
    Location
    Portland, OR
    Posts
    81
    The cluster is a direct bolt in, you don't change the connector so the wires all remain the same. Yes, you can hook the white tack wire to the wires going into the connector that goes to the cluster. According to the wiring diagram from alldatadiy, and how I wired mine, it's the white wire in pin #6 on the back of the cluster. This white wire originally came from the ignition coil on your TBI motor. If you still have that wire in the engine bay you can splice into that and there will be no need to go into the cab.


    Here's some info on the police cluster, it's hard to find and you will need the jumper on these. To be safe just look for a 96-97 cluster then it should be a direct swap IIRC, but do some searching first don't take my word for it.
    http://www.gmt400.com/forum/showthre...ap-Step-Motors

  3. #63
    Join Date
    Dec 2008
    Location
    South Carolina
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    794
    Hmmmmm I hooked to the white wire that was originally for the coil and my tach doesn't work...Maybe I messed up somewhere. I'll ohm the wire under the hood and at the cluster and make sure I hooked to the right wire.
    2008 GMC Sierra SLE....370ci LY6 with some goodies SOLD
    1995 C2500- LS1 swap with a mp112
    build thread- http://www.ls1truck.com/forums/lsx-t...-ls1-swap.html

  4. #64
    Join Date
    Aug 2012
    Location
    Portland, OR
    Posts
    81
    Yeah, just check for continuity. You can see the diagram has the tack connected to the ignition coil. If it ends up not working try this:
    http://lt1swap.com/lsx_tach.htm
    Last edited by Jeebalow; 04-14-2015 at 12:27 AM.

  5. #65
    This is awesome! Yeah, we need some videos...in cab video shifting as well. Does the 95 2500 have the same updated interior as the 95 1500? Or is it the older interior like the 89-94 1500 interior?
    Ethan

    First & only 4th gen Ram 4x4 in the 12's NA 12.747 @ 104.07 (1.663 60')
    2012 Black SC 4x4 1500 Hemi ARH longtubes, Vararam intake, Circle-D 3000, Meziere E-water pump
    Moe's 87mm throttle body, efan, 2010 frontend swap/4.56 gears, Greene Racing tune, E-power steering pump

  6. #66
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    794
    Yea mine has the updated interior. Once the rain quits I'll get some vids. It's supposed to rain solid for like a week
    2008 GMC Sierra SLE....370ci LY6 with some goodies SOLD
    1995 C2500- LS1 swap with a mp112
    build thread- http://www.ls1truck.com/forums/lsx-t...-ls1-swap.html

  7. #67
    Quote Originally Posted by chvy=power View Post
    Yea mine has the updated interior. Once the rain quits I'll get some vids. It's supposed to rain solid for like a week
    Damn. Was hoping you were gonna say the old interior like I have and it was a direct swap because when I searched it seemed like a 95-98 cluster swap into a 92 was either not doable or a huge pain in the ass.

    I'm looking at this one:
    http://www.dakotadigital.com/index.c...rod/prd911.htm

    It will display A/F as well
    Ethan

    First & only 4th gen Ram 4x4 in the 12's NA 12.747 @ 104.07 (1.663 60')
    2012 Black SC 4x4 1500 Hemi ARH longtubes, Vararam intake, Circle-D 3000, Meziere E-water pump
    Moe's 87mm throttle body, efan, 2010 frontend swap/4.56 gears, Greene Racing tune, E-power steering pump

  8. #68
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    794
    oh lawd at the price tag on that bad boy! Ya that look like a nice little set up tho
    2008 GMC Sierra SLE....370ci LY6 with some goodies SOLD
    1995 C2500- LS1 swap with a mp112
    build thread- http://www.ls1truck.com/forums/lsx-t...-ls1-swap.html

  9. #69
    Join Date
    Apr 2014
    Posts
    158
    Quote Originally Posted by GreyChevy View Post
    It will display A/F as well
    I don't see a/f listed. Where did you spot that?

  10. #70
    Yeah, that's why I was hoping the 95+ would swap right in cause that bastard is expensive!

    To get it to display a/f or a bunch of other readings you need an expansion module:
    http://www.dakotadigital.com/index.c...rod/prd785.htm

    Still requires a wideband but would display on the dash.
    Ethan

    First & only 4th gen Ram 4x4 in the 12's NA 12.747 @ 104.07 (1.663 60')
    2012 Black SC 4x4 1500 Hemi ARH longtubes, Vararam intake, Circle-D 3000, Meziere E-water pump
    Moe's 87mm throttle body, efan, 2010 frontend swap/4.56 gears, Greene Racing tune, E-power steering pump

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