---
id: what-engine-options-are-available-for-the-2026-gmc-sierra-hd
title: "What engine options are available for the 2026 GMC Sierra HD?"
category: faq
subtopic: sierra-hd-diesel
page_type: faq
source_url: "https://www.markquartmotors.com/research/gmc/sierra-hd.htm"
tags: ["gmc", "sierra hd", "diesel", "engine", "powertrain"]
questions:
  - "What engines does the GMC Sierra HD have?"
  - "Is there a diesel option for Sierra HD?"
  - "GMC Sierra HD Duramax engine specs"
related: [sierra-hd-towing, sierra-hd-performance]
dealer: Markquart Motors
---

The 2026 GMC Sierra HD offers two powerful engine options to match your workload. The standard 6.6L V8 gas engine pairs with a 10-speed automatic transmission for smooth, predictable power for daily hauling and jobsite use.

For maximum capability, the available Duramax 6.6L Turbo-Diesel V8 produces 470 horsepower and an industry-leading 975 lb-ft of torque. This diesel powertrain includes an integrated exhaust brake that enhances downhill control and reduces brake wear when towing heavy loads. Whether you need reliable everyday performance or peak capability for the toughest jobs, Markquart Motors has the right Sierra HD for you. Call (715) 833-0444 to discuss your needs or visit us in Chippewa Falls.