---
id: what-engine-options-does-the-2026-gmc-sierra-hd-offer
title: "What engine options does the 2026 GMC Sierra HD offer?"
category: faq
subtopic: sierra-hd-engines
page_type: faq
source_url: "https://www.markquartmotors.com/research/gmc/sierra-hd.htm"
tags: ["engines", "powertrain", "diesel", "v8", "sierra hd"]
questions:
  - "What engines are available in the 2026 Sierra HD?"
  - "Does the GMC Sierra HD have a diesel option?"
  - "What's the horsepower of the Sierra HD?"
related: [sierra-hd-towing, sierra-hd-performance]
dealer: Markquart Motors
---

The 2026 GMC Sierra HD gives you two powerful engine choices. The standard 6.6L V8 gas engine pairs with a 10-speed automatic transmission for smooth, predictable power perfect for daily hauling and jobsite work.

For maximum capability, the available Duramax 6.6L Turbo-Diesel V8 produces 470 horsepower and an industry-leading 975 lb-ft of torque. The diesel powertrain includes an integrated exhaust brake that enhances downhill control and reduces brake wear when towing heavy loads.

Both engines are built to handle demanding workloads with confidence. To discuss which powertrain best fits your needs and see current Sierra HD inventory at Markquart Motors in Chippewa Falls, call (715) 833-0444 or visit our new vehicle listings online.