2024 Gmc Denali 2024 Duramax

2024 Gmc Denali 2024 Duramax. Anyone know what’s going on with the new trucks? Truck ran fine no issues, but around 600 miles i started feeling a tug / pulse when i was driving and the rpm was sitting around 1100.

All are on extended drains and all sample well. This truck is by far the best one i have ever owned or used.