2020-2024 GM 3.0L 6 Cyl LM2 / LZO Duramax Diesel. High-performance water-to-air Intercooler adds both style and performance to your 3.0L LM2, LZO Duramax. It also significantly improves the airflow and lowers the pressure drop which results from the flow-optimized, cast aluminum end tanks and a larger less restrictive core structure.