
2022 GMC Sierra Denali 2500 HD
Upgraded to Tow More: Driver Trades Up 2021 GMC 3.0L Diesel for Powerful 2022 GMC 6.6L Duramax Seeking increased towing capacity for a future camper, driver Denny Ide swapped his 2021 GMC 3.0L Duramax for a new 2022 model boasting the mighty 6.6L engine. The upgrade brings not just more power, but a smoother driving experience, according to Denny.