The 2013 GMC Trucks Sierra 1500 sits in the final years of a full-size pickup generation known for traditional body-on-frame truck character, broad trim variety, and real day-to-day utility. Buyers looking at this exact Sierra are often balancing work use, highway comfort, and the look of the truck they already own. Tire fitment varies meaningfully here, with four primary radial sizes across 17-, 18-, and 20-inch wheel setups: 245/70R17, 265/70R17, 265/65R18, and 275/55R20. That makes wheel diameter and sub-model confirmation the first step, while product choice can narrow further by load specification, RWL sidewall styling, and the truck's intended use.
Which Tire Size Is Right for The 2013 GMC Trucks Sierra 1500
The 2013 GMC Trucks Sierra 1500 uses four primary tire sizes, and the right one depends on the exact sub-model and wheel package. These fitments are all radial, but they span three different rim diameters, so confirming both the sub-model and the truck's actual wheel size is the first step before comparing tires.
Fit(s): Denali, SLE (20 Inch Option), SLT (20 Inch Option), and XFE
Construction: Radial|Rim: 20 in
In 275/55R20, 275 is the section width in millimeters, 55 is the aspect ratio, R identifies radial construction, and 20 is the wheel diameter in inches. On the 2013 GMC Trucks Sierra 1500, this size is tied to 20-inch wheel setups and suits trims where appearance and wheel package matter as much as basic fitment. Product choice should stay focused on true 20-inch compatibility rather than assuming another Sierra size will interchange. It is the size to evaluate when the truck has a factory-style or existing 20-inch setup that needs to be matched correctly.
The 265/65R18 size uses a 265-millimeter nominal section width, a 65-series profile, radial construction, and an 18-inch rim. For the 2013 GMC Trucks Sierra 1500, this fitment appears on specific configurations such as Hybrid and certain Z71-related applications, so it should not be treated as universal across the range. Its sizing format is familiar to modern truck owners, but exact wheel diameter still matters before making a selection. This is the right size to review when the truck is already on an 18-inch wheel package and that configuration needs to be retained.
A 245/70R17 tire has a 245-millimeter section width, a 70-series profile, radial construction, and a 17-inch rim diameter. On this Sierra 1500, it serves several 17-inch applications and is also the only size in the current product selection shown here, where it appears as a BFGoodrich All-Terrain T/A KO2 with an RWL sidewall. That makes the buying decision more about intended use and wheel compatibility than about choosing among multiple sidewall looks. It is worth checking closely when the truck has a 17-inch wheel and needs a more truck-oriented all-terrain tire.
Fit(s): SL 4x4, SLE 4x2, SLE 4x4, SLE 4x4 Ext. Cab Long Box, SLE Z71, SLT 4x2, SLT 4x4, SLT 4x4 Ext. Cab Long Box, SLT Z71, WT 4x4, and WT 4x4 Ext. Cab Long Box
Construction: Radial|Rim: 17 in
The 265/70R17 designation means a 265-millimeter nominal section width, a 70-series profile, radial construction, and fitment on a 17-inch rim. This size appears across many Sierra 1500 configurations, but it still should be matched to the truck's exact setup because some trims use other 17-inch, 18-inch, or 20-inch sizes instead. Available choices here include BFGoodrich All-Terrain T/A KO2 options with an RWL sidewall in more than one load specification. It is the size to examine when the truck needs a 17-inch fitment with room to compare load-capacity-oriented product differences.
Sub-model fitment on the 2013 GMC Trucks Sierra 1500 is not one-size-fits-all. Several trims use a single tire size, while others can appear with more than one fitment, so confirming the exact sub-model and actual wheel diameter matters before choosing a tire.
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2013 GMC Trucks Sierra 1500 Denali
The Denali uses the 275/55R20 radial fitment, tying it to a 20-inch wheel setup. Tire selection should stay focused on maintaining that wheel diameter and the overall look and stance associated with this configuration.
The Hybrid uses the 265/65R18 radial size on an 18-inch rim. Tire choice begins with preserving that 18-inch fitment rather than cross-shopping 17-inch or 20-inch Sierra sizes that belong to other configurations.
The SL 4x2 uses the 245/70R17 radial size. That keeps the decision centered on 17-inch compatibility and whether the truck's use calls for the available all-terrain-style product choice in this fitment.
The SL 4x4 uses the 265/70R17 radial size. Tire selection should focus on the correct 17-inch fitment and, where relevant, compare available load specifications within that size.
The SLE with the 20 Inch Option uses 275/55R20. Matching that setup means confirming the truck is still on its 20-inch wheels before considering any tire choice within this fitment.
The SLE 4x2 appears with either 245/70R17 or 265/70R17, both radial 17-inch sizes. Selection depends on verifying the truck's actual wheel and tire setup rather than choosing between the two by assumption.
The SLE 4x4 can use 245/70R17 or 265/70R17, so this trim needs closer fitment confirmation than single-size sub-models. The practical first step is checking what 17-inch wheel and tire combination is currently on the truck.
2013 GMC Trucks Sierra 1500 SLE 4x4 Ext. Cab Long Box
The SLE 4x4 Ext. Cab Long Box uses 265/70R17. That keeps the tire search straightforward, with attention centered on correct 17-inch fitment and the intended mix of everyday driving and truck use.
The SLE Z71 can use either 265/65R18 or 265/70R17, both radial sizes but on different wheel diameters. The key decision is confirming whether the truck is on 18-inch or 17-inch wheels before narrowing the tire choice.
The SLT with the 20 Inch Option uses 275/55R20. Tire selection should preserve the 20-inch wheel fitment and keep the choice tied to the truck's actual wheel package.
The SLT 4x2 can use 245/70R17 or 265/70R17. That makes current wheel-and-tire confirmation important before comparing available products or deciding which 17-inch size belongs on the truck.
The SLT 4x4 also appears with either 245/70R17 or 265/70R17 radial tires. Buyers should verify the actual mounted size and wheel setup first, especially if the truck has seen wheel or trim-package changes over time.
2013 GMC Trucks Sierra 1500 SLT 4x4 Ext. Cab Long Box
The SLT 4x4 Ext. Cab Long Box uses 265/70R17. That narrows the search to a single 17-inch fitment and makes product differences within that size more important than cross-size comparison.
The SLT Z71 can use 265/65R18 or 265/70R17, depending on the wheel setup. Choosing correctly starts with identifying the truck's actual rim diameter before looking at any tire option.
The WT 4x2 uses 245/70R17. This is a straightforward 17-inch radial fitment, so the main considerations become product type, load suitability, and the truck's day-to-day use.
The WT 4x4 appears with either 245/70R17 or 265/70R17. Tire choice depends on confirming which 17-inch setup the truck actually has before comparing product details.
2013 GMC Trucks Sierra 1500 WT 4x4 Ext. Cab Long Box
The WT 4x4 Ext. Cab Long Box uses 265/70R17. That makes the search more direct, with attention on correct 17-inch fitment and the product specifications that match the truck's workload.
The XFE can use either 245/70R17 or 275/55R20, which means fitment spans two very different wheel diameters. Verifying whether the truck is on 17-inch or 20-inch wheels is essential before selecting any tire.
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 1500 Tires for Sale
Current product choices focus on the 17-inch Sierra sizes, with BFGoodrich All-Terrain T/A KO2 options available in 245/70R17 and 265/70R17. Comparison points include load specification, rim-width range, tire weight, and the RWL sidewall treatment.
For a 2013 GMC Trucks Sierra 1500, the biggest questions usually involve identifying the correct size by sub-model and wheel diameter, then comparing available radial tire choices, appearance details, and the fitment checks that matter before regular road use.
Tire Size & Fitment
What tire size fits a 2013 GMC Trucks Sierra 1500?
A 2013 GMC Trucks Sierra 1500 can use 275/55R20, 265/65R18, 245/70R17, or 265/70R17, depending on the exact sub-model and wheel package. All of these are radial fitments, but they do not belong to every Sierra 1500 configuration across the range.
The practical first step is matching the tire size to the truck's actual sub-model and wheel diameter. Several trims can appear with more than one fitment, so checking the current wheel size and existing tire markings helps prevent choosing a 17-inch tire for an 18-inch or 20-inch setup.
What size rim does a 2013 GMC Trucks Sierra 1500 use?
The 2013 GMC Trucks Sierra 1500 uses 17-inch, 18-inch, and 20-inch rim diameters, depending on configuration. The 245/70R17 and 265/70R17 sizes fit 17-inch wheels, 265/65R18 fits an 18-inch wheel, and 275/55R20 fits a 20-inch wheel.
Rim diameter is the most important checkpoint because these tire sizes are not interchangeable across different wheel sizes. Before choosing a tire, confirm the truck still has its intended wheel package, especially if it has changed hands or has had trim-related wheel swaps at some point.
Why does the 2013 GMC Trucks Sierra 1500 have more than one tire size?
The Sierra 1500 covers a wide spread of trims and equipment packages, so tire fitment changes with sub-model and wheel setup. Denali, Hybrid, Z71-related trims, work-oriented models, and 20-inch option packages do not all use the same tire size or rim diameter.
That means the correct choice is not based on the model name alone. A Sierra 1500 owner should confirm the exact sub-model, check the wheel diameter, and verify the size already mounted on the truck before comparing replacement tires or assuming another Sierra fitment applies.
Choosing the Right Tire
What should I consider when choosing a tire for a 2013 GMC Trucks Sierra 1500?
Start with the correct size for the truck's exact sub-model and wheel diameter, since this Sierra 1500 uses four different primary fitments. After that, compare construction details within the available products, including load specification, rim-width range, tire weight, and whether the tire's character matches how the truck is used.
A work-oriented truck, a weekend-use pickup, and a Sierra with a more appearance-focused wheel package may all point the buyer in different directions even when the basic size is correct. The most useful comparison is the one that keeps fitment accurate while matching the truck's real driving conditions.
What sidewall styles are available for 2013 GMC Trucks Sierra 1500 tires?
Among the currently available products for this 2013 GMC Trucks Sierra 1500, the visible sidewall treatment is RWL, or raised white letter. That styling appears on the BFGoodrich All-Terrain T/A KO2 options offered in the covered 17-inch sizes.
Sidewall style matters mostly as an appearance choice once the correct tire size has been confirmed. An RWL sidewall gives the truck a more traditional light-truck look, but it should still be evaluated alongside load rating, wheel compatibility, and whether the tire's overall character suits the Sierra's intended use.
What brands offer tires for the 2013 GMC Trucks Sierra 1500?
The current product selection for the covered Sierra 1500 sizes includes BFGoodrich. The available tires shown here are from the All-Terrain T/A KO2 series in 245/70R17 and 265/70R17 fitments.
Brand is only one part of the decision. Once the size is confirmed, it helps to compare the specific product version, including its load capacity, rim-width range, and overall suitability for how the truck is driven rather than choosing only by the name on the sidewall.
Restoration & Appearance
Which tire should I choose for a period-style 2013 GMC Trucks Sierra 1500?
A period-style choice for a 2013 GMC Trucks Sierra 1500 starts with keeping the correct original-type size format and the wheel diameter that belongs to the truck's exact configuration. Since this Sierra uses modern metric radial sizes, the first priority is matching the proper 17-, 18-, or 20-inch fitment.
Appearance comes into the decision after fitment is settled. A truck-oriented radial with an RWL sidewall can support a traditional early-2010s pickup presentation, but buyers focused on exact originality should compare the truck's existing setup with window-sticker, dealer, or marque-specific references before making a final choice.
Does correct tire fitment matter for a 2013 GMC Trucks Sierra 1500 restoration?
Correct tire fitment matters because wheel diameter, tire profile, and sidewall presentation all influence how a restored 2013 GMC Trucks Sierra 1500 looks and sits. Using the wrong size can change the truck's stance and create a mismatch between the tire and the sub-model's intended wheel package.
The most restoration-minded approach is to confirm the exact trim and the wheel setup currently on the truck before selecting replacement tires. Even on a relatively modern collectible pickup, staying close to the proper size family helps preserve the truck's visual balance and avoids unnecessary fitment complications.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 GMC Trucks Sierra 1500?
Yes. Wheel changes, leveling kits, suspension alterations, and tire upgrades can all affect fitment on a 2013 GMC Trucks Sierra 1500 even when the truck originally used one of the correct factory-type sizes. Differences in wheel width or offset can change clearance at the fender, suspension, and steering components.
That makes it important to check the truck as it sits today rather than relying only on the sub-model name. A Sierra with aftermarket wheels should have its actual rim diameter, width, and current tire markings confirmed before a replacement tire is selected.
What should I inspect before driving a 2013 GMC Trucks Sierra 1500 on new tires?
Before regular road use, inspect tire pressure, lug-nut security, valve stems, tread condition, and sidewalls for cuts, bulges, or shipping damage. It also helps to confirm that the tire size matches the wheel diameter and that there is clean clearance at full steering lock and through normal suspension movement.
A short initial drive followed by a second inspection is a sensible habit on a full-size pickup. Recheck inflation, look for any rubbing marks, and make sure the truck tracks normally, especially if the Sierra has different wheels, recent suspension work, or a heavier-duty tire than before.
How often should tires on a 2013 GMC Trucks Sierra 1500 be inspected?
Tires on a 2013 GMC Trucks Sierra 1500 should be inspected regularly, not just when tread looks low. Monthly pressure checks, visual inspection for uneven wear, and a closer review before long drives or towing seasons help catch issues early on a truck that may see mixed duty.
Owners should also pay attention after impacts, off-pavement use, or long idle periods. A Sierra that sits for stretches can still develop age-related issues, flat spotting, or slow air loss, so routine inspection remains important even when annual mileage is modest.
