---
id: what-s-the-maximum-towing-capacity-of-the-gmc-sierra-heavy-duty
title: "What's the Maximum Towing Capacity of the GMC Sierra Heavy Duty?"
category: faq
subtopic: sierra-hd-towing
page_type: faq
source_url: "https://www.markquartmotors.com/new-vehicles/gmc/trucks.htm"
tags: ["Sierra HD", "heavy duty", "towing", "diesel", "Duramax"]
questions:
  - "How much can the GMC Sierra Heavy Duty tow?"
  - "What engine does the Sierra HD have?"
  - "Does the Sierra HD come with a diesel?"
  - "What makes the Sierra HD work-ready?"
related: [gmc-trucks-overview, sierra-1500-specs]
dealer: Markquart Motors
---

The 2026 GMC Sierra Heavy Duty is work-ready with an available Duramax 6.6L Turbo-Diesel V8 delivering 470 horsepower and 975 lb-ft of torque, enabling maximum towing up to 36,000 pounds. It features two-speed transfer cases, skid plates, and trail hardware on Z71, AT4, and AT4X variants, plus advanced trailering systems with towing-focused assists and up to 14 camera views for confidence in any job. The upscale cabin includes authentic wood accents on Denali models and premium comfort features. Contact Markquart Motors at (715) 833-0444 to explore the Sierra HD and find the right configuration for your work.