It’s a 2017What year truck you asking about?
I work on semi trucks for a living and for Volvo trucks they have what’s called an emulator it taps into you ecm and tells it everything is there and finé without it being there ,so there’s no programming neededI believe those plugs are for capping the wires/sensors and injectors for the exhaust system. Since that would also mean you're disabling those components, it would require custom tuning for the ECM as well.