The 2013 GMC Trucks Sierra 2500 HD sits in the heavy-duty pickup market where towing, hauling, and long-wheelbase stability matter just as much as everyday road manners. Buyers looking at this generation are often balancing work-truck practicality with premium trims and larger wheel packages. Tire fitment on the 2013 GMC Trucks Sierra 2500 HD is entirely radial, but the exact size changes by sub-model and wheel setup, ranging from 17-inch applications up to 20-inch fitments. That makes the real decision less about bias-ply versus radial and more about confirming the truck’s wheel diameter, load-oriented tire spec, and the right appearance and use case for the specific trim.
Which Tire Size Is Right for The 2013 GMC Trucks Sierra 2500 HD
The 2013 GMC Trucks Sierra 2500 HD uses four primary tire sizes, and the right one depends on the exact sub-model and wheel diameter. All of these are metric radial sizes, but they span 17-inch, 18-inch, and 20-inch rims, so the first step is confirming the truck’s current wheel setup before comparing tread style, load-oriented specifications, or product choice.
Fit(s): Denali, SLE Crew Cab, and SLT (20 Inch Option)
Construction: Radial|Rim: 20 in
265/60R20 is a metric radial size that uses a 265-millimeter section width, a 60-series aspect ratio, and a 20-inch rim. On the 2013 GMC Trucks Sierra 2500 HD, this size is tied to 20-inch wheel applications, making wheel confirmation especially important before selection. Product variety is not broad here, so the main focus is verifying that the truck is actually on the 20-inch setup rather than one of the 17-inch or 18-inch configurations. This size makes the most sense when the truck already carries the matching 20-inch wheels and the owner wants to stay with that larger-wheel fitment.
265/70R18 is a metric radial size with a 265-millimeter section width, a 70-series profile, and an 18-inch rim diameter. It is one of the key fitments used across several 2013 GMC Trucks Sierra 2500 HD sub-models, so it often becomes the size to confirm when the truck is equipped with factory-style 18-inch wheels. Tire selection here is driven more by matching the correct wheel diameter and intended truck use than by appearance differences. It is a practical size to evaluate for owners who want to preserve the truck’s existing 18-inch setup and avoid mismatching wheel and tire dimensions.
245/75R17 is a metric radial size using a 245-millimeter section width, a 75-series aspect ratio, and a 17-inch rim. On the 2013 GMC Trucks Sierra 2500 HD, this size appears on several work-oriented and SLE configurations, so it is a common fitment for trucks equipped with 17-inch wheels. Available product choice in this size includes a BFGoodrich All-Terrain T/A KO2 with raised white letter sidewalls and a 6.5- to 7.5-inch rim-width range. This is a useful size to consider when the truck remains on its narrower 17-inch wheel package and the owner wants an all-terrain-style radial option.
265/70R17 is a metric radial size with a 265-millimeter section width, a 70-series profile, and a 17-inch rim diameter. It gives the 2013 GMC Trucks Sierra 2500 HD another 17-inch fitment path, but with a wider section than 245/75R17, so it should not be treated as interchangeable without checking the actual wheel and truck setup. In available products, this size appears in BFGoodrich All-Terrain T/A KO2 form with raised white letter sidewalls and more than one load-oriented specification. It is worth evaluating when the truck already uses 17-inch wheels and the owner needs to compare width, rim-width compatibility, and intended use carefully.
Sub-model fitment on the 2013 GMC Trucks Sierra 2500 HD is not one-size-fits-all, because tire selection changes with trim and wheel package. Checking the exact sub-model matters first, especially where the truck could be on 17-inch, 18-inch, or 20-inch wheels.
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2013 GMC Trucks Sierra 2500 HD Denali
The 2013 GMC Trucks Sierra 2500 HD Denali uses either an 18-inch or 20-inch radial fitment, so wheel diameter is the key detail before choosing tires. That makes this sub-model less about broad tire-size searching and more about confirming the actual wheel package already on the truck.
The 2013 GMC Trucks Sierra 2500 HD SLE Crew Cab spans all four primary tire sizes, making it the most variable fitment within this model range. Tire choice here starts with identifying the truck’s exact wheel diameter and current setup before comparing width, profile, or available product styles.
The 2013 GMC Trucks Sierra 2500 HD SLE Ext. Cab uses 17-inch or 18-inch radial fitments depending on the wheel configuration. Choosing the right tire means confirming whether the truck is on the narrower 245/75R17 setup, the wider 265/70R17 arrangement, or the 18-inch 265/70R18 package.
The 2013 GMC Trucks Sierra 2500 HD SLE Reg. Cab also uses multiple radial tire sizes across 17-inch and 18-inch wheel applications. That makes wheel and trim verification more important than brand comparison at the start, since the wrong rim diameter ends the fitment discussion immediately.
2013 GMC Trucks Sierra 2500 HD SLT (20 Inch Option)
The 2013 GMC Trucks Sierra 2500 HD SLT (20 Inch Option) centers the fitment decision around a single 20-inch radial size. Tire selection for this setup is straightforward once the 20-inch wheel package is confirmed, with the focus shifting to maintaining the correct overall fitment character for that larger wheel.
The 2013 GMC Trucks Sierra 2500 HD SLT Crew Cab uses one principal 18-inch radial tire size. That simplifies tire shopping, since the main job is matching the truck’s existing 18-inch wheel setup rather than sorting through several primary fitment paths.
The 2013 GMC Trucks Sierra 2500 HD SLT Ext. Cab also uses a single 18-inch radial tire size. With that fitment established, the buyer can focus on the tire’s intended use and wheel compatibility instead of deciding among multiple primary size families.
The 2013 GMC Trucks Sierra 2500 HD WT Crew Cab can use more than one radial tire size across 17-inch and 18-inch wheel packages. Tire selection here depends on confirming the truck’s actual wheel setup first, then narrowing the choice by width, profile, and use case.
The 2013 GMC Trucks Sierra 2500 HD WT Ext. Cab shares the same multi-size fitment pattern found on other work-oriented trims. That means the buyer should verify whether the truck is wearing 17-inch or 18-inch wheels before moving on to product details or load-oriented comparisons.
The 2013 GMC Trucks Sierra 2500 HD WT Reg. Cab uses several radial tire sizes depending on wheel configuration. Selecting the right tire starts with matching the truck’s actual wheel diameter, then checking that the chosen width and load-oriented specification suit the intended work or road use.
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 2013 GMC Trucks Sierra 2500 HD Tires for Sale
Available product selection centers on the 17-inch sizes, with BFGoodrich All-Terrain T/A KO2 options in raised white letter form. Within those fitments, comparison points include rim-width range, load capacity, and whether the truck uses 245/75R17 or 265/70R17.
These FAQs for the 2013 GMC Trucks Sierra 2500 HD focus on size identification, wheel-diameter differences, product selection in the supported fitments, and the practical checks that matter before putting a heavy-duty truck back on the road.
Tire Size & Fitment
What tire size fits a 2013 GMC Trucks Sierra 2500 HD?
The 2013 GMC Trucks Sierra 2500 HD uses four primary radial tire sizes: 265/60R20, 265/70R18, 245/75R17, and 265/70R17. The correct size depends on the truck’s exact sub-model and wheel package, so there is not one universal fitment across the entire Sierra 2500 HD range.
The most important next step is checking the truck’s current wheel diameter, since these sizes span 20-inch, 18-inch, and 17-inch rims. Once that is confirmed, the buyer can narrow the choice by sub-model, tire width, and intended use instead of risking a mismatch between tire and wheel.
What size rim does a 2013 GMC Trucks Sierra 2500 HD use?
A 2013 GMC Trucks Sierra 2500 HD can use 17-inch, 18-inch, or 20-inch rims, depending on the sub-model and wheel option. The supported tire sizes pair with those diameters as follows: 245/75R17 and 265/70R17 on 17-inch rims, 265/70R18 on 18-inch rims, and 265/60R20 on 20-inch rims.
That wide range makes wheel confirmation more important than guessing by trim name alone. Looking at the actual tire sidewall or measuring the installed wheel is the cleanest way to verify what the truck has before comparing tires, especially on trucks that may have changed hands or received different wheels over time.
Why does the 2013 GMC Trucks Sierra 2500 HD have more than one tire size?
The 2013 GMC Trucks Sierra 2500 HD has more than one tire size because its trim levels and wheel packages vary. Denali, SLE, SLT, and WT configurations do not all use the same wheel diameter, and some sub-models can appear with more than one supported size depending on how the truck was equipped.
In practical terms, that means tire shopping starts with the exact sub-model and the wheels currently on the truck. A 17-inch fitment and a 20-inch fitment are not interchangeable, and even within the 17-inch group the buyer still needs to confirm whether the truck uses 245/75R17 or 265/70R17.
Choosing the Right Tire
What should I consider when choosing a 245/75R17 or 265/70R17 tire for a 2013 GMC Trucks Sierra 2500 HD?
Start with the exact size already matched to the truck’s wheel diameter and setup. For the 17-inch fitments on a 2013 GMC Trucks Sierra 2500 HD, the supported sizes are 245/75R17 and 265/70R17, and available products include BFGoodrich All-Terrain T/A KO2 options with different load-oriented specifications.
From there, compare rim-width range, maximum load capacity at the stated psi, and the truck’s intended use. A heavy-duty pickup used for hauling or rougher service may need a different specification than one driven mostly unloaded, so the sidewall information and wheel compatibility deserve as much attention as the size itself.
What sidewall styles are available for 2013 GMC Trucks Sierra 2500 HD tires?
Within the currently available products for this application, the visible sidewall style is RWL, or raised white letter. That sidewall treatment appears on the BFGoodrich All-Terrain T/A KO2 options offered in the supported 17-inch Sierra 2500 HD tire sizes.
Sidewall style affects appearance more than fitment, but it still matters on a truck that balances work use with a more aggressive visual stance. The key is to choose the correct size and wheel match first, then decide whether a raised white letter presentation suits the truck’s look and intended use.
What brands offer tires for the 2013 GMC Trucks Sierra 2500 HD?
The available products in the supported fitments shown here come from BFGoodrich. For the 17-inch Sierra 2500 HD sizes with current product coverage, the brand appears in the All-Terrain T/A KO2 series and includes raised white letter sidewalls.
Brand alone should not be the only filter on a heavy-duty truck. It still makes sense to compare the exact tire size, load capacity at the stated inflation pressure, and the approved rim-width range so the selected tire matches both the wheel and the way the Sierra 2500 HD is actually used.
Restoration & Appearance
Does correct tire fitment matter for a 2013 GMC Trucks Sierra 2500 HD restoration?
Correct tire fitment matters on a 2013 GMC Trucks Sierra 2500 HD restoration because the truck used multiple wheel diameters and size combinations across its trim range. Using the wrong rim diameter or an unsupported size can change the truck’s stance, upset the intended visual balance, and complicate everyday use.
A restoration-minded owner should start by confirming the exact sub-model and wheel package already on the truck. Once that foundation is clear, it becomes much easier to choose a tire that preserves a stock-style presentation, matches the proper wheel size, and avoids unnecessary fitment surprises.
How does tire construction affect the appearance of a restored 2013 GMC Trucks Sierra 2500 HD?
On the 2013 GMC Trucks Sierra 2500 HD, the primary fitments are radial tires, so construction changes are not really a bias-ply-versus-radial appearance decision. The more noticeable visual differences come from tire size, wheel diameter, tread style, and sidewall treatment such as raised white letters.
For a restoration-oriented truck, appearance usually comes down to whether the tire complements the wheel package and trim level. A 17-inch all-terrain radial with RWL sidewalls creates a different look than an 18-inch or 20-inch highway-oriented setup, even when each one is still within the supported fitment family.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 GMC Trucks Sierra 2500 HD?
Yes, modifications can affect tire fitment on a 2013 GMC Trucks Sierra 2500 HD. Aftermarket wheels, suspension height changes, leveling kits, or body modifications can all alter the clearance picture, even if the tire size itself is one of the supported Sierra 2500 HD fitments.
A truck with non-original wheels should have its actual wheel diameter and width checked before new tires are chosen. Steering clearance, fender clearance, and the relationship between the tire and suspension components are worth verifying as well, especially on a heavy-duty truck that may see towing, hauling, or rougher road use.
What should I inspect before driving a 2013 GMC Trucks Sierra 2500 HD on new tires?
Before driving a 2013 GMC Trucks Sierra 2500 HD on new tires, inspect the wheels for the correct diameter and condition, confirm the tire size matches the truck’s setup, and check inflation against the tire’s intended service use. It is also smart to look over the valve stems and make sure there is no obvious interference at full steering lock.
A heavy-duty pickup places more demand on its tires than a light commuter vehicle, so a quick road-use inspection goes a long way. Look for proper clearance, listen for rubbing, and keep an eye on pressure stability after the first drives so any mismatch or mounting issue is caught early.
How often should tires on a 2013 GMC Trucks Sierra 2500 HD be inspected?
Tires on a 2013 GMC Trucks Sierra 2500 HD should be inspected regularly, with extra attention before hauling, towing, or taking the truck on a longer trip. At a minimum, pressure, visible tread condition, cuts, bulges, and signs of irregular wear deserve a routine check rather than a once-in-a-while glance.
That habit matters even more on trucks that sit for periods and then return to service. A Sierra 2500 HD can look ready to go while still having aging rubber, slow air loss, or wear related to alignment or suspension condition, so frequent inspections help catch problems before they become roadside issues.
