Found This Fun TSB / Bulletin Site

[Mad Maxx]

https://www.repairprocedures.com/bulletins/2019/make/model/84_100314062.html

 

Adjust Filter on the left for the time frame, change it to all. 

 

There certainly are a good amount of TSB's & Bulletins out for these Trucks! 

 

Without a subscription, you can't fully see what they're about, but you can read the title, get an idea and search the Number to get more info on your own.

[Mad Maxx]

This is one of my favorites: #09-06-04-026O - Identifying Non-GM (Aftermarket) Engine Calibrations for Gasoline Engines Using Tech 2 or GDS 2

 

They also have the same thing for the Diesel Engines.

[fish_guru]

Interesting. Didn't know the one about the oil filter.

[f8l vnm]

15 hours ago, Mad Maxx said:

This is one of my favorites: #09-06-04-026O - Identifying Non-GM (Aftermarket) Engine Calibrations for Gasoline Engines Using Tech 2 or GDS 2

 

They also have the same thing for the Diesel Engines.

yikes, good find