Im having a 03 3400 from an olds alero swapped into my 89z. I had a wiring harness made for my car b/c my old harness was trashed. Anyway the harness I have is setup for a digital egr and I am using the vacuum harness. The vacuum egr has 5 wires coming out and the digital egr has 4 wires . What do I do in order to keep the vacuum egr with the wiring for a digital egr? Thanks .
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