---
id: what-engine-options-does-the-2025-gmc-sierra-hd-offer
title: "What engine options does the 2025 GMC Sierra HD offer?"
category: faq
subtopic: sierra-hd-engines
page_type: faq
source_url: "https://www.markquartmotors.com/research/gmc/sierra-hd/trims.htm"
tags: ["GMC", "Sierra HD", "engines", "power", "torque"]
questions:
  - "What engines are available in the 2025 GMC Sierra HD?"
  - "How much horsepower does the GMC Sierra HD have?"
  - "What's the difference between the gas and diesel engines?"
related: [sierra-hd-trims, sierra-hd-denali-ultimate]
dealer: Markquart Motors
---

The 2025 GMC Sierra HD offers two powerful engine choices.

The **standard 6.6-liter V8 gas engine** delivers 401 horsepower and 464 lb-ft of torque-plenty of power for heavy loads and towing. If you need maximum capability, the **optional 6.6-liter Duramax Turbo-Diesel V8** steps up with 470 horsepower and an impressive 975 lb-ft of torque, engineered for serious workloads.

Both pair with a heavy-duty 10-speed automatic transmission built for durability. Whether you're hauling across rough terrain or managing daily hauling, you'll have the brawn to get it done.

Ready to see which Sierra HD suits your needs? Browse our new GMC inventory or call us at (715) 833-0444 to discuss engine options and schedule a test drive at Markquart Motors in Chippewa Falls.