GMC's huge Twin Six V12 gas engine was made to take on its diesel counterparts, powering fire trucks and farm machines, but ...

we now have news for the GMC Sierra 2500/3500 pickups. The brand has unveiled its refreshed 2024 models, which feature some mild styling updates, new interiors, upgraded engine power, a host of ...

GM pickups like the 2015 GMC Sierra 3500 boast strong engineering that ... power to the rear wheels is a bulletproof Allison 1000 six-speed automatic transmission. The Allison transmission ...