Truck Idles Rough

Same

 

2017 AC manual 2.7.......exact same issue as Commocean. Idle cycles. When it dips below 500rpm, noticeable vibration. It does eventually settle down, and it’s very smooth once it does. It’s just the wide swing that’s weird. On mine, it seems related to brake booster. 2500 miles on mine, done it since day one. Reluctant to bring to dealer.....

 

If you happen to decide to clean your battery terminals, I haven’t seen it mentioned lately in the threads:
Battery post brushes are a quick and sanitary way to keep bits of battery corrosion and acid from getting flung all over your engine compartment and onto your paint, which could happen when using a regular hand brush when cleaning the posts.