E67 help
Current performance wiring is doing the harness and wants 350 for a ECM and 175 to tune it. That seems like a lot from what I’m seeing on the web. The tune part I will have them do the basics so all my gauges work in the 99 suburban swap. Then it will have to go to an actual tuner to get dialed in.
I would appreciate any advice on where and what to get.

