The 2024 GMC Sierra 2500HD has powerful engine options and ... the six-speed automatic transmission mated to the base gas engine has been replaced with a ten-speed auto. Other widespread changes ...

The 6.6 Duramax is one of the most powerful engines for heavy-duty trucks like the Chevy Silverado and GMC Sierra, but how many miles per gallon does it get?

We've tested a Sierra 2500HD Denali with the diesel engine, which returned 17 mpg ... Those who stick with the GMC's standard gas-fed V-8 should expect to see even worse fuel economy than with ...

Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.) Alternator ...

In 2012, the Sierra 2500HD received enhancements aimed at improving performance and comfort. Notably, the integration of the available 6.6-liter Duramax Turbo Diesel V8 engine paired with an ...

This has become a season for heavy-duty trucks, with GMC revealing its upcoming 2024 Sierra HD, right on the heels of the unveils for the related Chevrolet Silverado HD and updated Ford Super Duty.

Made in either short- or long-bed form, with two or four doors and with 2- or 4-wheel drive, optional dual rear wheels and with a choice of several impressively powerful engines, the Sierra can be set ...

Showing the 2023 GMC Sierra 2500 2WD Reg Cab 142" Pro 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) $890 Starting MSRP $890 Starting MSRP includes (UD5) Front and Rear Park Assist (UKC ...

The 2025 GMC Sierra 2500HD Pro Regular Cab Long Box is equipped with a[n]Gasoline 6.6L V-8 engine that can produce ... 2500HD Pro Regular Cab Long Box's fuel tank? How efficient is a 2025 GMC ...

The 2024 GMC Sierra 2500HD Pro Regular Cab Long Box is equipped with a[n]Gasoline 6.6L V-8 engine that can produce ... 2500HD Pro Regular Cab Long Box's fuel tank? How efficient is a 2024 GMC ...