Re: modifying 4.8 vortec wire harness need help.......
Another option for the oil pressure gauge is to just use the stock hole behind the manifold. The PCM doesn't need the stock sending unit signal. Adapter bungs are also available for the temp sensor if you don't want to drill and tap.
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1971 Suburban 4x4, LQ4 6.0L, 4L80E, etc.
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