That was it. Got my fingers and right angle needlenose back in there and got it reconnected. It was the connection from the power puck to the OEM harness that can go either way. Got it right. It's screamin now. I'm gonna go drive around for awhile now. Love it. Thanks guys!!

That does make sense. I'll try that next time I get a few minutes and post back the results. I just wish they made fingers compatible with getting to that connector.

Just attempted to install P2040 Power Puck on my 2015 Denali HD. It's a pain getting the fuel pressure sensor plug off. Seems like they hid it under everything to try to keep people from installing things like this. It seems though with a slightly different harness it could be a lot easier ...