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On the LS1, the oil pressure sender (A) is in the same location, but the two sensors don’t share a common plug. The easy fix was to remove the sensor from the LS1 and swap it to the LS3. Other connections on the back of the LS1 included the cam sensor (B) and knock sensor plug (C). Both the LS3 and LS1 share a common power brake booster port.