u/ATS256

I recently bought a 2021 Silverado with the 3.0L Duramax. So far I absolutely LOVE the truck and have researched everything I can think of since it's my first diesel. The only "issue" I seem to be having is sometimes at a red light the idle will be slightly lower than usual where the truck shakes somewhat. I've tried searching this but it seems everyone has high idle issues.

Anyone familiar with this and if it's an issue?