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Old 07-28-2014, 07:45 AM   #5
Katrina/10
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Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
Re: Doing TBI swap to 69 GMC

If you carefully remove the 87 harness and mark every connector, you should be able to reuse it. It's nearly a stand alone harness already. I located the ECM on the side of my heater box inside the truck, and the wires were the right length.
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Gary

1971 Chevrolet C/10
1951 GMC 100
1977 GMC C15
1955 Chevrolet 3100
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