Hey guys! Im planning an LS1 engine swap for my 04 Rubicon. I understand most of the modifications that need to be made. The one thing Im not sure about is the "marriage" of the OEM Jeep ECU with the donor ECU. I understand that the donor ECU and wiring harness will need to be sent to a tuner for harness cleanup and ECU programming. I just dont understand how the two ECU's are joined together to make it possible to use the OEM dash gauges and other functions the factory ECU controls. If anyone has any ideas or advice, I would really appreciate it. Thanks!
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