---
id: what-engine-options-does-the-2025-gmc-sierra-hd-have
title: "What engine options does the 2025 GMC Sierra HD have?"
category: faq
subtopic: sierra-hd-engines
page_type: faq
source_url: "https://www.markquartmotors.com/research/gmc/sierra-hd/trim.htm"
tags: ["GMC", "Sierra HD", "engine", "horsepower", "torque", "diesel"]
questions:
  - "What engines are available in the 2025 Sierra HD?"
  - "Can I get a diesel Sierra HD?"
  - "How much power does the Sierra HD have?"
related: [sierra-hd-trims-overview, sierra-hd-luxury]
dealer: Markquart Motors
---

The 2025 GMC Sierra HD offers two potent engine choices. The **standard 6.6-liter V8 gas engine** delivers 401 horsepower and 464 lb-ft of torque-plenty of power for serious workloads. For maximum capability, the **optional Duramax 6.6-liter Turbo-Diesel V8** pumps out 470 horsepower and an impressive 975 lb-ft of torque, making it ideal for the heaviest towing and hauling demands.

Both engines pair with a heavy-duty 10-speed automatic transmission. The Denali Ultimate trim comes standard with the Duramax Diesel. For personalized recommendations based on your towing and work requirements, contact Markquart Motors at (715) 833-0444 or browse current inventory online.