GMPP LS3 Harness - Team Camaro Tech
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post #1 of 45 (permalink) Old Mar 17th, 17, 07:32 AM Thread Starter
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GMPP LS3 Harness

Guys, I was thinking of using a Bulkhead connector on the firewall for my LS3 GMPP controller harness. Anyone use one ??

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post #2 of 45 (permalink) Old Mar 17th, 17, 07:37 AM
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Re: GMPP LS3 Harness

I pulled all the stuff that needed to go into the interior through the old gas pedal hole. You have to pull a few connectors apart then re-ssemble to get everything through but that is a simple enough procedure.
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post #3 of 45 (permalink) Old Mar 17th, 17, 07:45 AM
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Re: GMPP LS3 Harness

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Guys, I was thinking of using a Bulkhead connector on the firewall for my LS3 GMPP controller harness. Anyone use one ??
Just for the pedal and ODB or for the ECM?

For Pedal and OBD I go thru the old pedal hole too

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post #4 of 45 (permalink) Old Mar 17th, 17, 07:52 AM Thread Starter
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Re: GMPP LS3 Harness

I wanted a clean install and was thinking it would be easier if I had a bulkhead connector on the firewall. The ECM and Fuse box will be installed in the battery tray. Now that I think about it, How many wires are needed in the interior ??? I may not need a bulkhead connector at all.

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post #5 of 45 (permalink) Old Mar 17th, 17, 08:19 AM
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Re: GMPP LS3 Harness

Only wires that go inside are pedal and OBD. Then you may have the tach wire which you can go thru the pedal hole or use the factory bulkhead connector as a pass thru.
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post #6 of 45 (permalink) Old Mar 17th, 17, 08:24 AM Thread Starter
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Re: GMPP LS3 Harness

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Originally Posted by Vega$69 View Post
Only wires that go inside are pedal and OBD. Then you may have the tach wire which you can go thru the pedal hole or use the factory bulkhead connector as a pass thru.
I was trying to figure out how to hide the wires going to the ECM and fuse box. How do I get to the passenger fender (under fenderwell) and to battery tray. I was trying to avoid routing across firewall/cowl area from engine side.

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post #7 of 45 (permalink) Old Mar 17th, 17, 08:48 AM
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Re: GMPP LS3 Harness

Under heater box and pull the fuse box and ECM connectors through inner fender,

There is not enough room for both the fuse box and the ECM in the battery tray. I mount the ECM to the inner fender behind the battery tray (between the batt tray and fender) then the fuse box in the battery tray.

There are no holes or tabs on the fuse box to mount it. I've found the best method is industrial strength 2" Velcro.
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post #8 of 45 (permalink) Old Mar 17th, 17, 08:53 AM Thread Starter
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Re: GMPP LS3 Harness

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Originally Posted by Vega$69 View Post
Under heater box and pull the fuse box and ECM connectors through inner fender,

There is not enough room for both the fuse box and the ECM in the battery tray. I mount the ECM to the inner fender behind the battery tray (between the batt tray and fender) then the fuse box in the battery tray.

There are no holes or tabs on the fuse box to mount it. I've found the best method is industrial strength 2" Velcro.
Thanks John. I will be running vintage air. So the passenger side of firewall is somewhat smooth, I added a plate. Here is what I had planned for the fuse box and ECM. Again, I'm trying to avoid running any wire from engine to passenger side on firewall. I would love to hide the wires.
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post #9 of 45 (permalink) Old Mar 17th, 17, 09:02 AM
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Re: GMPP LS3 Harness

if you keep them low on the firewall you don't really see them. I would think about re-wrapping them with power braid instead of the plastic split loom
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post #10 of 45 (permalink) Old Mar 17th, 17, 09:13 AM Thread Starter
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Re: GMPP LS3 Harness

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Originally Posted by Vega$69 View Post
if you keep them low on the firewall you don't really see them. I would think about re-wrapping them with power braid instead of the plastic split loom
OK, thank you.

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post #11 of 45 (permalink) Old Mar 17th, 17, 09:36 AM
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Re: GMPP LS3 Harness

I use the Ironworks bracket to mount the ECM up under the fender above the battery box where it also clears the front cocktail shaker. I fabricated a bracket to mount the fuse block to the core support above the battery tray. The Vaporworx controller mounts to the botttom of the bracket. You can split the fuse block apart and bolt the bottom shell to the bracket. It is tight with the diagonal fender brace but it will fit right in there. The Entropy fan controller also mounts to the core support in the same area.

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post #12 of 45 (permalink) Old Mar 17th, 17, 09:40 AM
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Re: GMPP LS3 Harness

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Originally Posted by dhutton View Post
I use the Ironworks bracket to mount the ECM up under the fender above the battery box. I fabricate a bracket to mount the fuse block to the core support above the battery tray. The Vaporworx controller mounts to the botttom of the bracket. You can split the fuse block apart and bolt the bottom shell to the bracket. It is tight with the diagonal fender brace but it will fit right in there. The Entropy fan controller also mounts to the core support in the same area.

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I just ordered their pedal bracket today to give it a try on the LS swap I'm doing in the 68 at this time

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post #13 of 45 (permalink) Old Mar 17th, 17, 09:44 AM
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Re: GMPP LS3 Harness

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Originally Posted by Vega$69 View Post
I just ordered their pedal bracket today to give it a try on the LS swap I'm doing in the 68 at this time
I used it. It places the gas pedal quite high, flush with the brake pedal. I would have preferred it if sat 1" behind the brake pedal, more like most cars.

Don
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post #14 of 45 (permalink) Old Mar 17th, 17, 10:03 AM Thread Starter
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Re: GMPP LS3 Harness

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I used it. It places the gas pedal quite high, flush with the brake pedal. I would have preferred it if sat 1" behind the brake pedal, more like most cars.

Don
I see guys using a C6 Corvette (2005-2013) pedal as well. The Corvette pedal looks more like an OEM Camaro pedal IMHO.

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post #15 of 45 (permalink) Old Mar 17th, 17, 10:23 AM
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Re: GMPP LS3 Harness

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I see guys using a C6 Corvette pedal as well. The Corvette pedal looks more like an OEM Camaro pedal IMHO.
Make sure they interchange. They are not all the same resistance as far as I know. That is not to say they won't work but ECM programming may be required.

Pedal looks OK to me, I am just not happy with the location of the pedal with the Ironworks bracket.

Don
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