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2024 GMC Sierra 2500 HD

The 2024 GMC Sierra 2500 HD represents the fifth model year of the fourth-generation full-size heavy duty pickup, for which it received a mid-cycle refresh.

This refresh follows the 2020 Sierra 2500 HD, which received a complete overhaul (re-engineering and redesign), followed by minor changes to the 2021 Sierra 2500 HD, 2022 Sierra 2500 HD and 2023 Sierra 2500 HD.

Quick Facts

Assembly Location GM Flint Assembly, Michigan, USA
Type Full-size heavy-duty pickup truck (three quarter ton), single rear wheel
Cab(s) Regular Cab, Double Cab, Crew Cab
Bed(s) Standard Bed, Long Bed
Layout Front-Engined, Longitudinal
Engine(s) 6.6L L8T V8 (Gasoline), Turbo 6.6 L5P V8 Duramax (Diesel)
Transmission(s) 10-Speed Auto, 10-Speed Auto Allison
Drive Wheels Rear-Wheel-Drive, Four-Wheel-Drive
Availability U.S.A., Canada, Mexico, Middle East
Chronology Fifth year of fourth-generation model
Changes summary Midcycle refresh
Predecessor 2023 GMC Sierra 2500 HD
Successor 2025 GMC Sierra 2500 HD

 

Model Line

The 2024 GMC Sierra 2500 HD is offered as a full-size heavy duty, three quarter ton pickup across the following trim levels and configurations:

Trim Levels

  • Pro
  • SLE
  • SLT
  • AT4
  • AT4X
  • Denali
  • Denali Ultimate

Configurations

  • 2WD Standard Bed Crew Cab (TC20743)
  • 4WD Standard Bed Crew Cab (TK20743)
  • 2WD Long Bed Crew Cab (TC20943)
  • 4WD Long Bed Crew Cab (TK20943)
  • 2WD Standard Bed Double Cab (TC20753)
  • 4WD Standard Bed Double Cab (TK20753)
  • 2WD Long Bed Double Cab (TC20953)
  • 4WD Long Bed Double Cab (TK20953)
  • 2WD Long Bed Regular Cab (TC20903)
  • 4WD Long Bed Regular Cab (TK20903)

Changes, Updates, New Features

The 2024 Sierra 2500 HD receives a mid-cycle refresh that includes a new front end design, a new cockpit (on some trims), powertrain updates, and the introduction of the new AT4X trim level.

See the complete list of 2024 GMC Sierra 2500 HD changes, updates and new features (link coming soon).

Powertrain

The 2024 GMC Sierra 2500 HD introduces a more potent turbo-diesel Duramax engine, while replacing the six-speed automatic transmission with a 10-speed transmission on models with the 6.6L V8 gasoline engine.

Engine Fuel Aspiration Transmission Drivetrain Horsepower @ RPM Torque @ RPM Axle Ratio
6.6L L8T V8 Gasoline Atmospheric 10-Speed Automatic (MKM) RWD or 4WD 401 @ 5200 464 @ 4000 3.73
6.6 L5P V8 Diesel Turbocharged 10-Speed Automatic (MGM or MGU) RWD or 4WD 470 @ 2800 975 @ 1600 3.42

Production

Production of the 2024 GMC Sierra 2500 HD began on March 1st, 2023 and ended on July 26th, 2024 to make way for the 2025 model. The truck is produced at the GM Flint plant in Michigan.

Platform

The 2024 Sierra 2500 HD continues to ride on a heavy duty variant of the GM T1 platform. Otherwise known as GMT-T1 or T1XX, the architecture is designed for pickup trucks and body-on-frame SUVs.

Seating

The 2024 Sierra 2500 HD is offered in three seating configurations, seating either three, five or six passengers:

  • Three-passenger configuration: this setup features a front 40/20/40 split bench seat (providing seating for three)
    • Exclusive to Regular Cab models
  • Five-passenger configuration (2-3): this setup features bucket seats in the front row (providing seating for two), along with a 60/40 bench seat in the second row (seating three), resulting in a 2-3 seating configuration
    • Available on SLT. Standard on AT4, AT4X, Denali and Denali Ultimate.
  • Six-passenger configuration: this setup features a 40/20/40 split bench seat in the front row (providing seating for three), along with a 60/40 bench seat in the second row (seating three), resulting in a 3-3 seating configuration
    • Standard on Pro and SLE. Available on SLT.

Rear three-quarters view of GMC Sierra HD Denali Ultimate in Titanium Rush Metallic paint.

Beyond 2024

We expect the fourth-generation Sierra 2500 HD to remain in production through the 2027 model year, at which point it will be overhauled for the next generation generation.

Sales

See running GMC Sierra sales numbers for global markets.

Discussion

Discuss the 2024 GMC Sierra 2500 HD in our GMC forum.

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Sierra 2500 HD News

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