---
id: what-engine-options-does-the-2026-gmc-sierra-hd-offer
title: "What engine options does the 2026 GMC Sierra HD offer?"
category: guide
subtopic: sierra-hd-engines
page_type: guide
source_url: "https://www.markquartmotors.com/research/gmc/sierra-hd.htm"
tags: ["GMC", "Sierra HD", "engines", "Duramax", "diesel", "gas"]
questions:
  - "What engine does the Sierra HD have?"
  - "Can I get a diesel Sierra HD?"
  - "What's the horsepower and torque of the Sierra HD?"
  - "Duramax vs gas engine in the Sierra HD"
related: [sierra-hd-overview, 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 for smooth, predictable power on 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. This diesel includes an integrated exhaust brake that enhances downhill control and reduces brake wear during heavy towing. Whether you choose gas or diesel, the Sierra HD delivers the power you need.

To learn current pricing, fuel economy, and which engine is right for your needs, call Markquart Motors at (715) 833-0444. Our sales team can walk you through the options and help you find the perfect Sierra HD.