2024 GMC Sierra HD: Are GMC Sierra HD Reliable? Since the unveiling of the related Chevrolet Silverado HD and the updated Ford Super Duty, this time of year has become known as the season for heavy-duty trucks. GMC recently unveiled its upcoming 2024 Sierra HD, which came right on the heels of the unveilings for the updated Ford Super Duty and the related Chevrolet Silverado HD.

These are all hefty pickup trucks that offer increased labor capabilities in addition to creature amenities and cutting-edge safety measures. By introducing a new Denali Ultimate trim level that is exceptionally well-appointed, GMC hopes to differentiate itself even more from Chevrolet as the upmarket alternative.

The competition between pickup trucks is taking place on a much greater stage now that the new GMC Sierra HD has entered the fray. It is prepared to compete against adversaries such as the Chevrolet Silverado HD and the Ford F-Series Super Duty. Let’s take a look at the areas that get the most substantial 2024 GMC Sierra HD changes.

This autumn has been a fruitful one for heavy-duty trucks, as Ford has debuted the new Super Duty, Chevrolet has taken the covers off the facelifted Silverado HD, and Ram has introduced the new 2500 HD Rebel.

Now that the 2024 GMC Sierra HD has been updated with new looks, an enhanced turbodiesel engine, more capabilities, and a new range-topping model known as the Denali Ultimate, it has taken the spotlight.

A minor facelift has been given to the exterior of the Sierra HD, with the primary emphasis being placed on the front end. The modifications are not too noticeable, but purchasers will notice that the grille has been updated, and it is now flanked by new headlights. The latter are also equipped with an animated lighting sequence that plays as the pickup is being approached or started.

A new front bumper has been added, and it has a more angular form than the previous one, in addition to fog lights that are more compact. The number of other improvements that have been made is restricted, but the vehicle now features updated wheels and new taillights.

Titanium Rush Metallic, Sterling Metallic, Volcanic Red Tintcoat, Redwood Metallic, Meteorite Metallic, and Downpour Metallic are the six new hues that have been added to the color palette since it has been updated.

2024 GMC Sierra HD
2024 GMC Sierra HD


The GMC Sierra HD pickups are capable of pulling a Herculean amount of weight, but that’s not all they accomplish to live up to their Herculean name. These high-powered workhorses are also rather presentable, as they include chrome accents on the outside and a leather saddle that provides a pleasant ride on the inside.

The Sierra 2500HD and 3500HD are the jumbo-shrimp versions of their half-ton equivalent, the Sierra 1500, which was evaluated in a separate article. When compared to the Chevrolet Silverado HD lineup, the degree of luxury and quality found in these GMC trucks is far better. The standard powertrain consists of a 6.6-liter V-8 with 401 horsepower and a 10-speed automatic transmission.

However, in order to achieve the Sierra HD’s maximum conventional towing capacity of 22,500 pounds, an optional 445-horsepower Duramax turbodiesel V-8 with a 10-speed automatic transmission is required. Additional trailer assist features, such as Transparent Trailer View and Trailer Side Blind Zone Alert, as well as an optional adaptive cruise control system that works with trailering, allow the Sierra HD to work smarter rather than harder.

Despite the fact that the heavy-duty Sierra does not have the polish or maximum towing capacity of rivals like the Ram HD or the Ford Super Duty, it is a good option for anyone who have a truck-sized hole in their heart.

What’s New for 2024?

The most powerful truck offered by GMC has received a subtle exterior facelift in addition to bigger updates, including as a redesigned engine that provides increased towing capability and an all-new grade level. The front fascia of the Sierra HDs has been updated, and they now have LED headlights and taillights that include sequential turn signals as optional extras.

Both the power and torque of the 6.6-liter Duramax turbocharged diesel V-8 have grown, now coming in at 470 horsepower and 975 pound-feet of torque, respectively. As a result of the boost in power, the towing capability of the whole array of Sierra 2500HD and 3500HD pickup trucks has improved, and the new maximum rating for the hitch is 22,500 pounds.

The six-speed automatic transmission that was formerly standard on the 401-horsepower, 6.6-liter V-8 gas engine has been swapped out with the Allison-certified 10-speed automatic transmission that was only available on the diesel engine. The popular Denali grade has been joined by an all-new Denali Ultimate trim, which is now available for both the 2500HD and the 3500HD.

This new trim delivers an even higher degree of luxury than its predecessor. In the same way as it does for the Sierra 1500, the Denali Ultimate adds leather wrapping to the door panels, steering wheel, and handles for the A and B pillars. Intricate leather stitching with a geographical map of Mount Denali in Alaska is added to the front seats, which are also power-adjustable in 16 different ways and come with heated and cooled messaging front seats.

These changes are reinforced by new trailering technology, which consists of adaptive cruise control when trailering, a gross combined weight (GCW) warning, and the fact that GM’s Transparent Trailer View is now also compatible with gooseneck and fifth wheel trailering. The driver assistance technology that comes standard on the Sierra HD has also been upgraded for 2024.

The Sierra HD Got Better Tech

The headlights of the 2024 GMC Sierra HD will play an animation as you get closer to your vehicle in an effort to include the most advanced technology available. The cabin is equipped with sunroof and chairs that massage the occupants.

This large vehicle is equipped with an infotainment display measuring 13.4 inches as standard, a digital gauge cluster measuring 12.3 inches, and an optional head-up display measuring 15 inches and offering many color options.

New trailers are equipped with cameras that assist in aligning the trailer with the hitch or fifth wheel. What’s behind the trailer may be seen on screen thanks to a camera. In addition, adaptive cruise control continues to function even while a trailer is being towed, and an alarm will sound if the maximum allowable weight is exceeded.

When it finally gets here, we can’t wait to see what the AT4X is capable of doing. It is anticipated that the remaining variants will be accessible by the spring of 2023.

The latest generation of the GMC Sierra HD looks better, has an interior that is of a higher quality, has more power, and provides a performance that is more efficient. Additionally, it ought to have improved off-roading capabilities.

2024 GMC Sierra HD Interior
2024 GMC Sierra HD Interior

2024 GMC Sierra HD Interior: Luxurious Cabin Loaded With Tech

GMC has invested in a significant amount of effort to improve the interior of the 2024 Sierra HD by adding more advanced technologies, as well as increased levels of comfort and elegance. New upholstery hues and stitching patterns are being added to the SLE and SLT trim levels, respectively. Premium materials provide higher-end trims like the AT4, Denali, and the recently introduced Denali Ultimate a more opulent appearance within the vehicle.

The Denali Ultimate is the model that steals the show for 2024 because to its ridiculously high levels of luxury and technological amenities. It has a one-of-a-kind Alpine Umber interior that is upholstered in full-grain leather and has open pores in the darker Paldeo wood.

The inside of the Sierra HD Denali Ultimate is on par with those of luxury saloons, and it can hold its own against them! In terms of its technological capabilities and features, it is outfitted with a six-way MultiPro Tailgate and a Kicker audio system as standard equipment. You also have the option of customizing it with a Bose audio system that has 12 speakers.

It also has a standard power sunroof and a head-up display with a diagonal screen of 15 inches as standard equipment. Microsuede was used for the headliner, visors, and pillar trimmings in addition to having 16-way power adjustments and massage capabilities for the front seats. Other opulent amenities include these. Even the grips on the A and B pillars have been covered in leather to complete the look.

2024 GMC Sierra HD Gets More Duramax Diesel Grunt

The 2024 GMC Sierra HD will continue to be offered with two different engine choices and will have the same chassis configuration as the 2024 Chevrolet Silverado HD. The gasoline engine has a 6.6-liter V8 displacement and is capable of producing 401 horsepower and 464 pound-feet of torque. The standout feature of the 2024 model, though, is its Duramax diesel engine.

GMC has increased the power such that it can now generate 470 horsepower and 975 pound-feet of torque. The Duramax engine that was used in the 2023 Sierra HD produced 445 horsepower and 910 pound-feet of torque. According to GMC, the newly discovered muscle contributes to a roughly 25 percent improvement in the low-end torque. This has been accomplished by installing a brand-new turbocharger system.

The new turbo package also includes internals that are more powerful, which improves the engine’s braking performance. Both of the motors are connected to an Allision ten-speed automatic gearbox, which is the default configuration for the vehicle and delivers power to the rear wheels. The configuration of adaptive four-wheel drive is an available option.

2024 GMC Sierra HD Exterior
2024 GMC Sierra HD Exterior

New Sierra HD Adds More Hauling Capabilities With Clever Tech

GMC has been able to improve the carrying capability of the 2024 Sierra HD thanks to the addition of low-end oomph. Towing capacity has been increased by 4,000 pounds with the introduction of the new Sierra 2500HD, which can now haul up to 22,500 pounds. Towing a weight of up to 36,000 pounds is no problem for the 2024 Sierra 3500HD.

But this time it’s not all about brute force; GMC has upgraded these workhorses with a whole host of new intelligent technological features so that they can perform to their full potential. It is certain that the ProGrade Trailering System will make people’s lives on the road a great deal more comfortable. The package includes a Trailer View that may be used for Gooseneck or Fifth Wheel Trailering. This view gives the impression that the driver is seeing “through the trailer.”

Driving attentively is made easier by the availability of a Trailer Side Blind Zone Alert. The GCW Alert is now standard on the Sierra HD and will sound an alarm if the combined weight of the vehicle and its trailer is more than the specified maximum. The hitch may be dropped correctly in just one move with the assistance of a Hitch Guidance that includes a Hitch View. A Bed View with Zoom and Bed Hitch Guidance, in addition to a Rear Side View with a Trailer Length Indicator, are some of the other features.

Additionally, there is a trailering-specific Adaptive Cruise Control that may be used. The purpose of incorporating all of these technological elements was to make the vehicle safer and easier to operate.