When the exhaust is reintroduced ... One owner stated that their Duramax diesel-powered Silverado was producing smoke and suddenly wouldn't go over 10 miles per hour. However, the issue ceased ...

GMC's 3.0-liter Duramax was updated in 2023 with new steel ... New for 2024 is an available active exhaust system for SLT, Denali, Denali Ultimate, AT4, and AT4X. Engineers worked to provide ...