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Thread: 94 Lifted Silverado 6.0/4L80e swap Build

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  1. 03-20-2012 08:12 PM #1
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    HPICamaroSS
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    Nelsons harness is hooked up for the most part, installed the drivers side head and it was just barely hitting the frame rail so I have 2 ratchet straps sucking it toward the passenger side right now. had them wrapped in ceran wrap and then tin foil on top of that so they wouldnt get scratches, or my greasy finger prints. Going to let it sit like that over night. Got my throttle body on as well and now I have to figure out where I am going to mount the ecm because i want it inside but it wont fit behind my glove box, its just too bulky. any ideas for where to put it INSIDE.
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    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html
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  2. 03-23-2012 05:56 PM #2
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    HPICamaroSS
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    Doesnt look like I am going to be mounting the ECM inside the truck...just not enough room. Theres 2 things I could do to possibly make it work and thats either shove it under the passenger seat (which it wont fit good because the wires wont be long enough, or cut the fins off the ecm and see if it will fit in the dash then. So I think Ill just put it where my stock batt was. And I am still stuck on my VSS connector. I still have an extra one left and I can not find any left over plugs on the tranny or xfer case. I have the front one on the tranny plugged in and I looked all over for where I plug the second vss in and I cant find anything. Theres nothing on the tranny and nothing on the xfer case (besides the 2 plugs that my old harness plugs into)
    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html
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  3. 03-23-2012 09:45 PM #3
    92 6.0
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    Quote Originally Posted by HPICamaroSS View Post
    Doesnt look like I am going to be mounting the ECM inside the truck...just not enough room. Theres 2 things I could do to possibly make it work and thats either shove it under the passenger seat (which it wont fit good because the wires wont be long enough, or cut the fins off the ecm and see if it will fit in the dash then. So I think Ill just put it where my stock batt was. And I am still stuck on my VSS connector. I still have an extra one left and I can not find any left over plugs on the tranny or xfer case. I have the front one on the tranny plugged in and I looked all over for where I plug the second vss in and I cant find anything. Theres nothing on the tranny and nothing on the xfer case (besides the 2 plugs that my old harness plugs into)
    The vss will plug in to the rear of your transfer case. You will have to wire the vss output freom your swap harness to the speedo and get rid of the original plug that you left in your transfer for the vss only. You'll need the one that plugs in above the shift linkage so your front end will engage.
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  4. 04-22-2012 06:05 PM #4
    RedHeartbeat
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    Power may be coming from Blue PCM connector pin 19 or it may be wired into the power lead that is going to the 4 wire connector for 12v power, could be switched or always on.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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  5. 04-23-2012 11:17 AM #5
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    Quote Originally Posted by RedHeartbeat View Post
    Power may be coming from Blue PCM connector pin 19 or it may be wired into the power lead that is going to the 4 wire connector for 12v power, could be switched or always on.
    Ok I'll try that thanks!
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  6. 04-23-2012 11:23 AM #6
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    i have a Nelson harness too & didn't have to hook anything up to the brakes, & i don't have a neutral safety switch, & mine shifts & stops just fine.
    how's your idle when you try to stop, is it high?


    My LS1 swap http://www.ls1truck.com/forums/my-ga...t-gondown.html
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  7. 04-23-2012 04:29 PM #7
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    Quote Originally Posted by RPM Graphics View Post
    i have a Nelson harness too & didn't have to hook anything up to the brakes, & i don't have a neutral safety switch, & mine shifts & stops just fine.
    how's your idle when you try to stop, is it high?
    My idle is just fine. Warm and cold. I dont have a accurate reading bc My tach is way off and I need to call Nelson to see if they can fix it/ recalibrate it with me sending my ecm back in. But I do know its idleing about right. Sounds like its between 600 and 1000. When I try to stop it might rev up a tad because it wants to leep forward but then ends up stalling if you dont put it in neutral.
    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html
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  8. 04-23-2012 06:03 PM #8
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    Pic updates

    Heres some pics of my 3" exhaust from the headers back to a y pipe, through a electric cutout, then a flowbasterd, then back to duals.
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    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html
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  9. 04-23-2012 07:00 PM #9
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    Quote Originally Posted by RedHeartbeat View Post
    Power may be coming from Blue PCM connector pin 19 or it may be wired into the power lead that is going to the 4 wire connector for 12v power, could be switched or always on.
    So is that all I do is take pin 19 from the blue connector and wire it into the power lead on the brake switch?
    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html
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