Owners/service Manual problems of the 2017 Chevrolet Silverado

Just received a letter from general motors with a page that is to be inserted into my owners manual. The issue it purports to solve is that the manual states that if this truck has forward collision alert, it also has forward automatic braking & intelligent brake assist. That is incorrect & this alert is to correct that error. But, the manual insert provided is nonsense. It has no page number to tell us where to insert the new page; there are 2 sections relating to this in the manual. The insert also says it only applies to 1500 series trucks. Mine is a 2500 series. So why send this. Gm has messed this up and it seems to me you need to call them on it to provide correct inserts for the 2 manual areas to which it applies. That should include correct information and page numbers. Otherwise the material I received is irrelevant to correcting the original error. I am a retired government performance auditor, so serious mistakes in correcting problems concern me.