I wanted to make a thread to inform others that are trying to tune their newer GM, but more specifically a 2022 2.8 Duramax Colorado with E98.

At some point in maybe 2020-2021 GM started to implement a gateway module or something similar that in essence prevents any ability to read and write your ECM thru the OBD port with your HPT interface. I just got my Dmax Colorado and was going to pull the stock tune to start tinkering. After multiple failed attempts to read due to "timing out" and then proceeding to try every troubleshooting option with no luck I opened a ticket.

The outcome of that ticket is basically this: You cannot tune a 2022 2.8 Duramax Colorado with an E98 thru the OBD port due to the gateway module, you are limited to a bench harness. This was what I was told from HPT support. I wish there was another way not to use a bench harness but I was provided that as the "only solution." There is another solution from down under...