What codes did you have?

 

First scan, a couple days before the CEL, I had these errors in the screenshot.

The codes point to a CD/radio calibration.. and a power loss (replaced batteries). I “cleared” them a couple days before this problem

This is only code on both scans once the CEL presented::: P133E

https://static.nhtsa.gov/odi/tsbs/2017/MC-10157036-9999.pdf

Thor was supposed to have all the “updates”… and since this was a 2017 TSB.. well, I guess they missed one…

The possible fixes are:

So… cheapest fix would be a glow plug relay… and verify the updated code is on the GP controller.

relay appears to work.. and since not stuck on the road and it’s under “warranty”, I hope this is covered…

 

Is that the Blue driver app?

 

Yes.. O-boys verified

 

@cfell ,
According to the rock, and DMAX store, not many options for glow plugs. You've got ACDELCO and Standard motor products.