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Old 09-12-2018, 09:08 AM   #6
Nodnarb76
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Join Date: May 2013
Location: Mississippi
Posts: 501
Re: 87 R10 Ls Swap (What old wires can I get rid of)

On the driver's side firewall there is a large wiring connector that the TBI harness goes to. When I did mine, I took the time to learn what each wire does and then just cut out the TBI harness. Most of those wires are 12v switched (provides power to the various TBI sensors). Some go to the gauges.
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1987 R20 Suburban LQ4/4L80e swap: http://67-72chevytrucks.com/vboard/s...d.php?t=693824
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