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Old Jun 19, 2020 | 04:18 AM
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Default LS3 Harness ground
In the middle of an LS3 swap. Where do ground the three grounding wires on the GMPP harness? No problem with the first one, have it going to the side of the block. What about the two in the near the engine oil pressure sensor?
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Old Jun 19, 2020 | 04:18 PM
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I grounded both heads and ran a lead to the firewall/unibody.
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Old Jun 19, 2020 | 05:29 PM
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Thanks Michael. I was a little nervous about using a head bolt.
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Old Jun 19, 2020 | 05:30 PM
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Originally Posted by Michael Yount
I grounded both heads and ran a lead to the firewall/unibody.
Thanks Michael. I was a little nervous about using a head bolt.
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Old Jun 19, 2020 | 05:36 PM
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Don't use a head bolt, there are threaded holes in the back of the heads where the OEM place the grounds. The ring terminal is big enough to fit the bolt through...

T,
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Old Jun 19, 2020 | 05:38 PM
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You don't use a head bolt there are 4 threaded holes in the end of each head use one of those, you may have to buy a bolt.
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Old Jun 19, 2020 | 05:40 PM
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^^^What they said...
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Old Jun 20, 2020 | 06:35 AM
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Thanks guys.
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