2025 6.6 Duramax Problems

2025 6.6 Duramax Problems. One of the reasons i mentioned the ulv is if you use a thicker 6 or 7 cst fluid in these things they slip and shift like crap when its cold. General motors has released a service update for units of the 2025 chevy silverado hd equipped with the 6.6l v8 l5p turbodiesel duramax diesel engine.

First came check engine light and code for clogged particulate filter, dealer cleaned filter. Then came check engine light and code for bad mass airflow.