---
id: what-engine-options-are-available-on-the-2026-gmc-sierra-hd
title: "What engine options are available on the 2026 GMC Sierra HD?"
category: faq
subtopic: sierra-hd-engines
page_type: faq
source_url: "https://www.markquartmotors.com/research/gmc/sierra-hd.htm"
tags: ["GMC", "Sierra HD", "engine", "powertrain", "diesel"]
questions:
  - "What engines does the GMC Sierra HD have?"
  - "Is there a diesel option for the Sierra HD?"
  - "6.6L V8 vs Duramax diesel Sierra HD"
related: [sierra-hd-towing, sierra-hd-vs-competitors]
dealer: Markquart Motors
---

The 2026 GMC Sierra HD offers two powerful engine choices to match your hauling and towing needs.

The standard 6.6L V8 gas engine pairs with a 10-speed automatic transmission, delivering 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.

Both engines are built for demanding work. The diesel is the go-to choice for maximum towing and load control capability. Talk with our sales team at (715) 833-0444 to compare which powertrain best suits your workload, or browse our current new GMC inventory online.