#diesel

The 2026 GMC Sierra lineup spans gasoline, diesel, and electric variants, reflecting a truck market in which manufacturers are serving multiple use cases rather than betting on a single propulsion path.

Diesel engines now occupy a shrinking corner of the American light-duty market, with surviving options concentrated in pickups, vans, and a limited set of SUVs even as heavy-duty demand remains resilient.

Near-record diesel prices are squeezing truckers, reviving fuel surcharges and raising the odds that higher transportation costs will move through to retailers and consumers.

Diesel exhaust fluid freezes at 12 degrees Fahrenheit, and that basic chemistry can turn into a real-world operational problem for trucks relying on SCR emissions systems in extreme cold.