The 2024 GMC Trucks Sierra 2500 HD sits squarely in the modern heavy-duty pickup market, where towing ability, off-road capability, and upscale trim distinctions all influence the wheel-and-tire package. On this truck, tire selection is not a one-size-fits-all question, because Sierra 2500 HD fitment spans five radial sizes across 17-inch, 18-inch, and 20-inch rims. That makes sub-model and wheel confirmation especially important, from work-oriented Pro and SLE configurations to AT4, Denali, and AT4X variants. Available choices center on BFGoodrich All-Terrain T/A KO2 products with raised white letter or raised black letter sidewall presentation. The right choice comes down to matching the exact trim and wheel setup, then selecting the load capacity and appearance that suit how the truck is used.
Which Tire Size Is Right for The 2024 GMC Trucks Sierra 2500 HD
The 2024 GMC Trucks Sierra 2500 HD uses five primary tire sizes, and the correct one depends on the exact sub-model and wheel diameter. Fitment spans 17-inch, 18-inch, and 20-inch rims, so the first step is confirming the truck's trim and actual wheel setup before choosing a tire. Once that is settled, the decision shifts to the available radial product options, sidewall style, and load specification within the correct size.
Fit(s): AT4, Denali, Denali Ultimate, SLE, and SLT
Construction: Radial|Rim: 20 in
A 275/65R20 tire is a metric radial size with a 275-millimeter nominal section width, a 65-series aspect ratio, and fitment for a 20-inch rim. On the 2024 GMC Trucks Sierra 2500 HD, this size is one of the larger-diameter primary fitments used on certain trims and keeps the truck in a fully modern radial construction. In available products, it appears in BFGoodrich's All Terrain TA KO2 series with an RBL sidewall treatment. This size is the one to evaluate when the truck is equipped with 20-inch wheels and the trim level calls for that larger wheel-and-tire package.
A 275/70R18 size uses a 275-millimeter nominal section width, a 70-series profile, and an 18-inch rim in a modern radial construction. For the 2024 GMC Trucks Sierra 2500 HD, it serves as a primary fitment on several sub-models and sits between the 17-inch and 20-inch applications in wheel diameter. The available BFGoodrich All Terrain TA KO2 version carries a raised white letter sidewall, giving it a more traditional truck appearance than a plain black sidewall. This is the size to consider when the Sierra is on 18-inch wheels and the trim-specific fitment points to this combination.
A 305/70R18 tire is a wide metric radial size with a 305-millimeter nominal section width, a 70-series aspect ratio, and an 18-inch rim. On the 2024 GMC Trucks Sierra 2500 HD, this size is tied to AT4X and AT4X AEV Edition applications, where confirming the exact sub-model matters because it is not shared across the full range. Its broad section width gives it a distinct fitment role within the Sierra lineup compared with the narrower 275-series and 245-series sizes. This size should be matched carefully to the truck's actual wheel package and clearance setup rather than chosen simply because it shares an 18-inch rim diameter.
A 245/75R17 tire uses a 245-millimeter nominal section width, a 75-series profile, and a 17-inch rim in radial construction. For the 2024 GMC Trucks Sierra 2500 HD, it appears on certain Pro and SLE applications and represents one of the narrower primary fitments in the range. The available BFGoodrich All Terrain TA KO2 version uses a raised white letter sidewall and is built around a rim-width range tailored to this 17-inch size. This fitment is best evaluated by buyers who have confirmed a 17-inch wheel setup and want to stay within the truck's correct trim-specific tire dimensions.
A 265/70R17 size is a metric radial tire with a 265-millimeter nominal section width, a 70-series aspect ratio, and fitment for a 17-inch rim. On the 2024 GMC Trucks Sierra 2500 HD, it is used on certain Pro and SLE configurations, so it should not be treated as universal across all trims. Available BFGoodrich All Terrain TA KO2 options in this size include more than one load specification, both with raised white letter sidewalls, which makes product selection more than just a size match. This size deserves a closer look when the truck has 17-inch wheels and the intended use calls for comparing the available load-capacity choices.
Tire fitment on the 2024 GMC Trucks Sierra 2500 HD varies meaningfully by sub-model, and several trims can use more than one primary size. Checking the exact trim and wheel package is essential before choosing a tire, especially because the lineup spans 17-inch, 18-inch, and 20-inch applications.
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2024 GMC Trucks Sierra 2500 HD AT4
The 2024 GMC Trucks Sierra 2500 HD AT4 uses either 275/65R20 or 275/70R18 radial tires, so wheel diameter is the key first check. Once the truck's wheel package is confirmed, selection centers on the correct metric radial size and the available all-terrain product details within it.
The 2024 GMC Trucks Sierra 2500 HD AT4X uses 305/70R18 radial tires, giving it a distinct fitment compared with the rest of the Sierra 2500 HD range. Tire selection starts with staying in that larger 305-section size and confirming that the wheel and overall setup still match AT4X specifications.
The 2024 GMC Trucks Sierra 2500 HD AT4X AEV Edition uses the 305/70R18 radial size. That makes the tire decision more about matching the truck's exact wheel package and preserving the intended fitment than comparing several primary size options.
2024 GMC Trucks Sierra 2500 HD AT4X AEV Edition Diesel
The 2024 GMC Trucks Sierra 2500 HD AT4X AEV Edition Diesel uses 305/70R18 radial tires. Buyers should focus on confirming that size against the truck's current wheel and suspension setup before evaluating tread, load specification, or other product differences.
The 2024 GMC Trucks Sierra 2500 HD AT4X Diesel also uses the 305/70R18 radial fitment. Because that size is specific to this part of the Sierra lineup, tire selection should begin with exact trim confirmation rather than assuming any 18-inch Sierra tire is appropriate.
The 2024 GMC Trucks Sierra 2500 HD Denali uses 275/65R20 radial tires. That points the buyer toward a 20-inch wheel fitment, where the decision becomes choosing the correct radial tire presentation and specification within that established size.
The 2024 GMC Trucks Sierra 2500 HD Denali Ultimate uses the same 275/65R20 radial tire size as other 20-inch applications in the range. Tire selection is therefore less about multiple primary sizes and more about staying with the correct 20-inch fitment and product specification.
The 2024 GMC Trucks Sierra 2500 HD Pro can use 245/75R17, 265/70R17, or 275/70R18 radial tires depending on its wheel setup. This makes wheel diameter and exact configuration the first priority before comparing available all-terrain choices or load-capacity differences.
The 2024 GMC Trucks Sierra 2500 HD SLE has the broadest fitment spread here, using 245/75R17, 265/70R17, 275/70R18, or 275/65R20 radial tires. Tire choice depends on confirming the truck's actual wheel package first, since the same trim can appear with several legitimate size combinations.
The 2024 GMC Trucks Sierra 2500 HD SLT uses either 275/65R20 or 275/70R18 radial tires. That means the buyer should verify whether the truck carries 20-inch or 18-inch wheels before moving on to sidewall appearance and other product details.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2024 GMC Trucks Sierra 2500 HD Tires for Sale
Available Sierra 2500 HD products center on BFGoodrich All Terrain TA KO2 radial tires in the supported 17-inch, 18-inch, and 20-inch sizes. Depending on size, buyers can compare raised white letter and raised black letter sidewall presentation, along with differing load-capacity and rim-width specifications.
These FAQs focus on exact 2024 GMC Trucks Sierra 2500 HD tire fitment, including trim-level size differences, wheel diameter, radial tire selection, sidewall style, and the checks that matter before road use or after modifications.
Tire Size & Fitment
What tire size fits a 2024 GMC Trucks Sierra 2500 HD?
The 2024 GMC Trucks Sierra 2500 HD uses five primary tire sizes: 275/65R20, 275/70R18, 305/70R18, 245/75R17, and 265/70R17. All of them are radial sizes, and the correct one depends on the truck's exact sub-model and wheel package rather than the Sierra 2500 HD name alone.
The practical first step is identifying the trim and confirming whether the truck has 17-inch, 18-inch, or 20-inch wheels. Pro and SLE trucks can appear with several sizes, while AT4X applications use 305/70R18 and Denali-related trims use 275/65R20, so choosing by appearance alone can lead to the wrong fitment.
What size rim does a 2024 GMC Trucks Sierra 2500 HD use?
A 2024 GMC Trucks Sierra 2500 HD can use 17-inch, 18-inch, or 20-inch rims depending on sub-model and tire size. The 245/75R17 and 265/70R17 sizes use 17-inch rims, 275/70R18 and 305/70R18 use 18-inch rims, and 275/65R20 uses a 20-inch rim.
Rim diameter should be confirmed before anything else because the Sierra 2500 HD lineup spans three wheel diameters. After that, check the actual tire size on the truck and compare it with the trim-specific fitment, especially on Pro, SLE, AT4, and SLT models that may have more than one legitimate wheel-and-tire combination.
Why does the 2024 GMC Trucks Sierra 2500 HD have more than one tire size?
The 2024 GMC Trucks Sierra 2500 HD has more than one tire size because different sub-models and wheel packages use different fitments. The range includes work-oriented trims with 17-inch options, mid-range and off-road trims with 18-inch sizes, and upper trims with a 20-inch application.
That variation means tire selection has to start with the exact truck, not just the model name. A Denali, an AT4X, and a Pro can all be Sierra 2500 HD trucks while using different sizes, so checking the door-jamb tire label, current wheels, and trim designation helps avoid choosing the wrong diameter or section width.
Choosing the Right Tire
What should I consider when choosing a tire for a 2024 GMC Trucks Sierra 2500 HD?
Start with the correct primary size for the truck's exact trim and wheel diameter, because the 2024 GMC Trucks Sierra 2500 HD uses five different radial sizes. After size is confirmed, compare the available product's load capacity, rim-width specification, sidewall style, and whether the tire matches the truck's intended work, towing, or off-road use.
A Sierra used as a daily-driven heavy-duty pickup may call for a different emphasis than one set up mainly for trail use or appearance. It also helps to verify whether the truck still has its original wheel package, since aftermarket wheels or suspension changes can affect which supported tire dimensions make the most sense.
What sidewall styles are available for 2024 GMC Trucks Sierra 2500 HD tires?
Available sidewall styles for the 2024 GMC Trucks Sierra 2500 HD include RWL and RBL, depending on tire size. RWL means raised white letter, which gives a more traditional off-road and truck presentation, while RBL means raised black letter for a darker, more understated appearance.
Sidewall style does not change the need to match the correct tire size and wheel diameter. It simply lets the buyer shape the truck's visual character once fitment is settled, so a Sierra owner can choose between a more classic all-terrain look or a cleaner black-sidewall presentation within the proper radial application.
What brands offer tires for the 2024 GMC Trucks Sierra 2500 HD?
The available products for the supported 2024 GMC Trucks Sierra 2500 HD sizes come from BFGoodrich. The current assortment centers on the All Terrain TA KO2 series in the applicable 17-inch, 18-inch, and 20-inch radial sizes used across the Sierra 2500 HD trim range.
That makes size, sidewall treatment, and load specification more important comparison points than brand switching on this page. For a buyer, the key is confirming the truck's exact fitment first, then deciding whether the available KO2 option in that size matches the intended use and the desired overall look.
Restoration & Appearance
Which tire should I choose for a period-style 2024 GMC Trucks Sierra 2500 HD?
A period-style choice for a 2024 GMC Trucks Sierra 2500 HD still begins with the correct modern radial size for the exact trim and wheel package. Since this is a current heavy-duty truck rather than a vintage restoration application, appearance usually comes down to selecting the appropriate supported size and choosing the sidewall treatment that best suits the build.
Raised white letter options can emphasize a more traditional all-terrain truck look, while raised black letter styling feels more subdued. The best visual result still depends on keeping the tire matched to the truck's actual rim diameter and overall setup, especially on trims where more than one legitimate size may be used.
How does tire construction affect the appearance of a restored 2024 GMC Trucks Sierra 2500 HD?
On the 2024 GMC Trucks Sierra 2500 HD, the primary fitments are modern radial tires across every supported size. That means the appearance difference is shaped less by bias-ply-versus-radial choice and more by the tire's proportions, wheel diameter, and whether the sidewall uses raised white letters or raised black letters.
Visual balance can change noticeably between the 17-inch, 18-inch, and 20-inch packages, so trim-correct sizing matters to the truck's stance. Buyers aiming for a clean, cohesive look should confirm the wheel package first, then compare sidewall presentation and tread character within the supported radial size for that specific Sierra.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2024 GMC Trucks Sierra 2500 HD?
Yes. Modifications can affect tire fitment on a 2024 GMC Trucks Sierra 2500 HD even when the tire size itself is correct for a stock application. Aftermarket wheels, offset changes, lift or leveling kits, suspension alterations, and body-trim changes can all influence clearance, steering sweep, and the amount of room available for the chosen tire.
That matters even more on trims with larger factory sizes such as 305/70R18 or 275/65R20. A modified truck should be checked for wheel width, clearance at full lock, and any contact points under compression so the selected radial tire matches the real-world setup rather than only the original trim specification.
What should I inspect before driving a 2024 GMC Trucks Sierra 2500 HD on new tires?
Before driving a 2024 GMC Trucks Sierra 2500 HD on new tires, inspect tire pressure, verify the correct size and rim diameter, and make sure each tire is mounted on a wheel within the appropriate width range. A quick visual check for bead seating, valve condition, and any rubbing points is also worthwhile before normal road use.
After installation, it helps to recheck clearance with the steering turned and the truck loaded as it will actually be used. On a heavy-duty pickup, confirming that the selected tire's load capacity matches the truck's demands is just as important as confirming the size stamped on the sidewall.
What should I check before a longer drive in a 2024 GMC Trucks Sierra 2500 HD?
Before a longer drive in a 2024 GMC Trucks Sierra 2500 HD, check inflation pressure, tread condition, visible sidewall damage, and any signs of air loss. It is also smart to confirm that all four tires match the truck's intended fitment, especially on trims where more than one wheel-and-tire package may be common.
A longer trip puts more importance on consistent condition across the set, particularly if the truck will be towing or carrying load. Looking over wheel fasteners, listening for rubbing after recent suspension work, and inspecting for cuts, bulges, or irregular wear can help catch fitment or maintenance issues before they become roadside problems.
