2026 GMC Sierra 2500HD Engine Options: 6.6L Gas vs Duramax Diesel — Which Is Right for You?
2026 GMC Sierra 2500HD Engine Options: 6.6L Gas vs Duramax Diesel — Which Is Right for You? By Ryan Green, Marketing Director Learn more about Ryan The 2026 GMC Sierra 2500HD offers two distinct powerplants: the proven 6.6L V8 gas engine and the revolutionary Duramax 6.6L Turbo-Diesel. The gas option provides straightforward reliability and simpler…