The response is appreciated. No short trips, the Jimmy got a substantial amount of highway time but the fuel likely was from hours of idling in -35c weather and injector issues. I'll point out the elevated iron level was likely from the distributor gear, as I had to replace it (The distributor assembly) as many others have due to a grinding noise and rough idle. Upon inspection the gears were actually heavily worn, I'll post pictures tomorrow.
The BN unit input from anyone would be great as this I have no idea about.
Im definitely pleased with the report except for the lack of comments from the lab.