Reduced engine power 2017 Silverado

[SPi]

2017 Silverado 6.2 -8 spd auto. We installed longtubes and an F1A Procharger. Truck is tuned and our client has been enjoying for a couple months now. Only real issue I have is that ever since the first time i flashed my first tune into it I get a "reduced engine power " message on the dash. The truck runs and drives fine, no codes in the ECM or anywhere else i scan the truck. I have tried a number of things including flashing back to stock adn the message always appears when you start the truck. It's more of annoyance then anything but I would like to fix it for my client. Any ideas ?
This is the tune.

20999

[SPi]

Bump

[1906]

If you adjusted your speed limiter, move it back a bit.

[bobo]

If you adjusted your speed limiter, move it back a bit.


x2. You can also log the reduce engine power reason. I had one for speed limit mismatch with onstar. Moved speed limiter lower and message is gone.

[SPi]

Thanks guys, I finally have the truck back at the shop. I'll give this a shot and report back.

[SPi]

Well, I moved the speed limiter lower and it fixed my issue up right away!! Thanks bobo and 1906 !!

[GMPX]

Good feedback, what a strange thing that is though.

[SPi]

Yah GMPX, very strange. Truck is running very well, at least 15000 kms put on it now and that was the only issue. I would have thought it would effect other things as well.

[Abesstorage]

I have almost the identical truck. 2017 6.2 with Procharger and 8 speed. I’m getting ECM driven throttle blade flutter after 5000 rpm and up to the shift under WOT. Did you experience this? Assume i need to remove torque reduction somewhere?

[SPi]

Abesstorage, I don't think I experienced that but I will look at some of my datalogs to confirm for you. I will say that this truck did not drive well at all until I tuned the 8spd trans. The trans. tuning transformed this truck completely, it wasn't enjoyable to drive before I did. It performed well on the dyno, but the street manners and shift characteristics under heavy throttle or WOT were not good.

[Abesstorage]

Got it, I did tune the trans and you are correct, huge difference!! Anyway you would be willing to share your ECM tune so I can compare to my tables?

[SPi]

Post your tune, or PM me with it and I would be happy to take a look and compare to mine. You can email me @ spitune@live.com too