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Thread: 1995 C2500 ls1 swap

  1. #1
    Join Date
    Dec 2008
    Location
    South Carolina
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    795

    1995 C2500 ls1 swap

    The old TBI 350 in my 2500 work truck just turned over 200k not too long ago, and with it being almost 20 years old I figure it wouldnt be long before it bit the dust. This is my first LS swap into an obs truck so bare with me!! Any help is greatly appreciated because I need a lot of it lol. So far here are the parts I have

    -2000 LS1 motor with truck 78mm dbc intake
    - Custom EPS blower cam
    -Whipple side mount blower
    -Schoenfield headers
    -walbro fuel pump
    -dirty dingo mounts
    -Nelson swap harness and nelson tuned pcm
    -Clutch and flywheel for 6.0 nbs truck
    -earl/russel fuel line fittings

    Here is the truck


    I stacked some of my parts under the Christmas tree shortly after the wife saw them...needless to say I found another spot for them! Lol
    Last edited by chvy=power; 12-15-2014 at 01:21 PM.
    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. #2
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    Did some work this weekend and got the tired 350 out and the nv4500 trans out. Gonna get the trans freshened up with new bearings and syncros.

    Kitty puss hangin out for moral support lol




    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

  3. #3
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    Im not much on wires, electronics, etc.....so i need some help figuring out what to do with the old harness?? Do I just leave it in the truck? Where the hell is the PCM on this truck? Do i need the original pcm? I know the nelson harness is pretty much a stand alone harness so im not sure how the abs system, windshield wiper motor, and things like that are going to work if i take the old harness out...
    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. #4
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    Just wanna take a second and give a big thanks to Nelson Performance. The whole crew is great and awesome to work with. Wanna give a special thanks to Allen for all his help. He has tuned every truck Iv ever had and tunes all my friends and families trucks. His work has always been excellent and he has always been quick to respond, whether it's business or just me needing help. He has been a big help during this swap as well
    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

  5. #5
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    Got the fittings in to do my fuel system...now all I need is a corvette fuel filter
    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

  6. #6
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    The paint job the schoenfield puts on their headers is absolutely pathetic. Most of it rubbed off in the box during shipping. My guess is they put the cheapest thing they can on them just to keep them from rusting. Anyways I cleaned off all the old paint and prepped and painted them with some VHT header paint I picked up from the parts store. Iv had good luck with this stuff in the past and it has ceramic in it. Kinda has a matte black look, I like it
    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. #7
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    So changed plans and IM going with a mp112 supercharger instead of the whipple side mount. So the whipple
    Is for sale if anyone is interested!!!

    Been messing with the stock wiring harness thining out the bs I don't need. What a pain in the a$$!!!!!!! Anyways my Nelson harness came in the mail along with the pcm and a Nelson tune . Nelson put the wrong vss plug on the harness so I need to get that fixed ASAP. Hopefully he will just send one and I can splice it on. Here she is


    Vss plug on Nelson harness

    Plug that I need
    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

  8. #8
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    Ran down to the parts store and got a vette filter for my fuel system. Here is the part number if anyone wants it. My s&p adapters came in as well
    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. #9
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    Cam came in last night! Iv used EPS cams in multiple builds for myself and each time the cams performed beyond my expectations. Geoff at EPS is an awesome guy to work with and always answers my questions thoroughly.

    Anyways! Specs on my custom grind blower cam are 222/226 .604/.604 116lsa


    Picked up my heads from the machine shop last night too...just some ole 5.3 truck heads I had rebuilt and had BTR dual platinum springs and titanium retainers installed

    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

  10. #10
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    Got the cam, timing set, and lifters put in the motor today


    Hopefully tomorrow I'll get the heads on, and mate the engine and trans. If all goes well I'll set the motor and trans in the truck!
    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

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