The 2019 GMC Trucks Sierra 2500 HD sits in the heavy-duty pickup segment where towing ability, payload demands, and day-to-day durability matter as much as appearance. Buyers looking at this truck usually need tire fitment that matches the exact wheel and trim setup already on the vehicle, because this model year uses several different radial sizes. Depending on sub-model and wheel package, the Sierra 2500 HD uses 245/75R17, 265/70R17, 265/70R18, or 265/60R20 tires. Current product choice is strongest in the 17-inch sizes, with BFGoodrich All-Terrain T/A KO2 options carrying raised white letter sidewalls. The key step is confirming the truck's exact sub-model and wheel diameter before comparing load capacity, rim-width compatibility, and intended use.
Which Tire Size Is Right for The 2019 GMC Trucks Sierra 2500 HD
The 2019 GMC Trucks Sierra 2500 HD uses four primary tire sizes, and they do not apply across every version of the truck the same way. Sizes vary by sub-model and wheel package, and the truck spans 17-inch, 18-inch, and 20-inch rim diameters, so the first step is confirming the actual wheel diameter on the truck before choosing a tire.
In 245/75R17, the 245 is the nominal section width in millimeters, 75 is the aspect ratio, R identifies radial construction, and 17 is the wheel diameter in inches. This is a modern metric radial size used on certain Sierra 2500 HD configurations with 17-inch wheels. Available product choice in this size includes BFGoodrich's All-Terrain T/A KO2 with raised white letter sidewalls. It is a practical size to evaluate when the truck is equipped with the smaller 17-inch wheel setup and the buyer wants to balance correct fitment with an all-terrain tire style.
In 265/70R17, the 265 indicates nominal section width in millimeters, 70 is the aspect ratio, R means radial, and 17 identifies the wheel diameter. On the 2019 Sierra 2500 HD, this size belongs to 17-inch wheel applications and gives the buyer another correct fitment path within that rim diameter. BFGoodrich All-Terrain T/A KO2 options are available here as well, including versions with different load capacities and the same raised white letter presentation. This size is worth confirming carefully because it shares the 17-inch rim diameter with 245/75R17 but is not the same tire.
In 265/70R18, the 265 is the nominal section width in millimeters, 70 is the sidewall profile relationship, R denotes radial construction, and 18 is the wheel diameter in inches. This size serves Sierra 2500 HD configurations equipped with 18-inch wheels and appears across several sub-models. It is best approached as a wheel-specific fitment choice rather than a styling alternative to the 17-inch or 20-inch sizes. Buyers considering this size should verify the truck's current wheel package and overall setup before moving forward, especially if the truck has changed hands or received aftermarket wheels.
In 265/60R20, the 265 is the nominal section width in millimeters, 60 is the aspect ratio, R marks radial construction, and 20 is the wheel diameter. This is the 20-inch wheel fitment used on certain Sierra 2500 HD trims, making wheel confirmation especially important before selection. Its lower-profile format sets it apart from the 17-inch and 18-inch sizes used elsewhere in the lineup, even though the width figure begins the same as some other options. It should be chosen only when the truck is actually equipped for the 20-inch setup and clearance remains appropriate for the current suspension and wheel package.
Sub-model fitment on the 2019 GMC Trucks Sierra 2500 HD is not uniform, and several trims can use more than one tire size depending on wheel package. Checking the exact sub-model matters, but confirming the truck's actual rim diameter matters just as much before comparing tire options.
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2019 GMC Trucks Sierra 2500 HD Base
The 2019 GMC Trucks Sierra 2500 HD Base uses 17-inch or 18-inch tire fitments, so there is more than one correct path depending on how the truck is equipped. Tire selection starts with confirming the wheel diameter on the vehicle, then choosing the appropriate radial size for that setup.
The 2019 GMC Trucks Sierra 2500 HD Denali uses either an 18-inch or 20-inch radial tire fitment. That makes wheel verification especially important, since the buyer is choosing between two distinct rim diameters rather than simply comparing different tires in one size.
The 2019 GMC Trucks Sierra 2500 HD SLE spans the widest fitment range here, covering 17-inch, 18-inch, and 20-inch tire sizes. Selection depends on the truck's actual wheel package first, after which load capacity, sidewall style, and intended road or trail use become the main comparison points.
The 2019 GMC Trucks Sierra 2500 HD SLT uses either an 18-inch or 20-inch radial size depending on wheel setup. That means tire shopping should begin with a direct check of the current wheels rather than assuming every SLT uses the same size.
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 2019 GMC Trucks Sierra 2500 HD Tires for Sale
Available product choice is concentrated in the 17-inch fitments, where BFGoodrich All-Terrain T/A KO2 tires appear in 245/75R17 and 265/70R17 with raised white letter sidewalls. These options can be compared by load capacity, rim-width compatibility, and overall all-terrain tire character.
Owners of a 2019 GMC Trucks Sierra 2500 HD usually need to sort out wheel diameter first, then compare the correct tire size, load capacity, and available product style. These FAQs focus on fitment by sub-model, 17-inch product choices, and practical checks before road use.
Tire Size & Fitment
What tire size fits a 2019 GMC Trucks Sierra 2500 HD?
The 2019 GMC Trucks Sierra 2500 HD uses four primary radial tire sizes: 245/75R17, 265/70R17, 265/70R18, and 265/60R20. The correct one depends on the truck's sub-model and wheel package, so there is not one universal size for every Sierra 2500 HD in this model year.
The quickest way to narrow it down is to confirm the actual wheel diameter on the truck first. A 17-inch wheel points toward either 245/75R17 or 265/70R17, while 18-inch and 20-inch wheels use their own sizes. That check is especially important if the truck has aftermarket wheels or has changed trim-level appearance over time.
What size rim does a 2019 GMC Trucks Sierra 2500 HD use?
A 2019 GMC Trucks Sierra 2500 HD can use 17-inch, 18-inch, or 20-inch rims, depending on sub-model and wheel setup. The tire sizes paired with those diameters are 245/75R17 or 265/70R17 on 17-inch wheels, 265/70R18 on 18-inch wheels, and 265/60R20 on 20-inch wheels.
That means rim diameter is the first fitment check before comparing tread style or load rating. Tire sizes that look similar on paper are not interchangeable across different wheel diameters. A direct look at the tire sidewall or wheel itself is often the safest starting point when the truck's current setup is uncertain.
Do all 2019 GMC Trucks Sierra 2500 HD sub-models use the same tire size?
No, the 2019 GMC Trucks Sierra 2500 HD sub-models do not all use the same tire size. Base, Denali, SLE, and SLT versions can share some sizes, but they do not all share one common fitment across the board, and several trims have more than one possible size.
That makes sub-model identification helpful, but wheel confirmation is still essential because some trims span multiple diameters. For example, certain versions use 18-inch wheels while others may use 17-inch or 20-inch setups. Tire selection gets much easier once the buyer confirms both the trim and the actual wheel on the truck.
Choosing the Right Tire
What should I consider when choosing a 17-inch tire for a 2019 GMC Trucks Sierra 2500 HD?
Start by confirming whether the truck uses 245/75R17 or 265/70R17, since both are correct 17-inch sizes on certain Sierra 2500 HD configurations. From there, compare radial construction, intended use, load capacity, and rim-width compatibility rather than assuming any 17-inch truck tire will suit the vehicle equally well.
The available BFGoodrich All-Terrain T/A KO2 choices make those comparisons especially relevant. In 245/75R17, the rim-width range is 6.5 to 7.5 inches, while 265/70R17 products are matched to 7.0 to 9.0 inches. Checking the wheel width, the truck's work demands, and whether the tire is meant for highway use or mixed terrain helps narrow the choice.
What sidewall styles are available for 2019 GMC Trucks Sierra 2500 HD tires?
Among the available products for this 2019 GMC Trucks Sierra 2500 HD fitment set, the visible sidewall style is RWL, or raised white letter. That treatment appears on the BFGoodrich All-Terrain T/A KO2 options offered in the covered 17-inch sizes.
Sidewall style matters mostly as an appearance decision once the correct size, load capacity, and wheel compatibility are established. Raised white letters give the truck a more traditional all-terrain presentation than a plain black sidewall. Buyers who want the tire to complement the Sierra's stance should treat sidewall styling as a finishing choice rather than the starting point.
What brands offer tires for the 2019 GMC Trucks Sierra 2500 HD?
BFGoodrich is the brand represented in the currently available products for the 2019 GMC Trucks Sierra 2500 HD sizes covered here. The product line shown is the All-Terrain T/A KO2, offered in 245/75R17 and 265/70R17 radial fitments.
That keeps the comparison focused on specification differences within one established all-terrain series rather than on brand-to-brand tradeoffs. Buyers should pay closer attention to the exact size, rim-width range, and load figure than to the brand name alone. Matching the tire to the truck's actual wheel setup and intended use remains the more important step.
Restoration & Appearance
Which tire should I choose for a period-style 2019 GMC Trucks Sierra 2500 HD?
A period-style approach on a 2019 GMC Trucks Sierra 2500 HD usually starts with staying in the truck's correct primary tire size and matching the actual wheel diameter already on the vehicle. For the product choices shown here, that means looking at the proper 17-inch radial size and then deciding whether an all-terrain presentation suits the truck's intended look.
Since this is a modern heavy-duty pickup, appearance usually works best when it stays consistent with the trim and wheel package rather than chasing a one-size-fits-all vintage theme. Raised white letter sidewalls can create a more assertive, traditional truck look, but the right fitment and load capability should still come before styling details.
How does tire construction affect the appearance of a restored 2019 GMC Trucks Sierra 2500 HD?
For the 2019 GMC Trucks Sierra 2500 HD, the primary fitments covered here are radial tires, so construction choice is less about bias-ply versus radial appearance and more about selecting the right radial size and sidewall treatment. The visual difference buyers will notice most comes from wheel diameter, tire proportions, and sidewall styling.
A 17-inch all-terrain tire with raised white letters creates a different presentation than an 18-inch or 20-inch setup, even when the truck remains within correct fitment families. Anyone aiming for a clean restoration-style finish should match tire size closely to the wheel package and overall build rather than using appearance alone to guide the choice.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 GMC Trucks Sierra 2500 HD?
Yes, modifications can affect tire fitment on a 2019 GMC Trucks Sierra 2500 HD. Aftermarket wheels, suspension changes, leveling or lowering kits, and body alterations can all change the space available for the tire and can also change which wheel width a given tire needs to work properly.
That matters even when the tire size itself is one of the correct Sierra 2500 HD fitments. A truck that started with a 17-inch setup may now have different wheels, offset, or clearance than stock. Checking wheel diameter, wheel width, and turning clearance before installing new tires helps avoid surprises during steering or full suspension movement.
What should I inspect before driving a 2019 GMC Trucks Sierra 2500 HD on new tires?
Before road use, inspect tire pressure, lug nut tightness, visible sidewall condition, tread seating, and clearance at the fenders and suspension on the 2019 GMC Trucks Sierra 2500 HD. It also helps to confirm that the tire size matches the wheel diameter and that the wheel width falls within the tire's acceptable range.
A short local drive followed by a second visual check is a sensible next step. Look for any rubbing marks, uneven stance, or unexpected air loss after the first miles. On a heavy-duty pickup, it is also smart to make sure the tire's load capacity matches the truck's intended work before using it for towing or hauling.
How often should tires on a 2019 GMC Trucks Sierra 2500 HD be inspected?
Tires on a 2019 GMC Trucks Sierra 2500 HD should be inspected regularly, with quick checks before longer drives and more careful inspections at routine service intervals. Pay attention to tread wear, cuts, bulges, cracking, punctures, and slow air loss, especially on a truck that may see towing, hauling, or periods of infrequent use.
Regular inspection is important because a heavy-duty truck can place very different demands on its tires depending on how it is used. A Sierra 2500 HD driven empty around town may wear tires differently than one that works under load. Keeping pressures correct and catching uneven wear early can also reveal alignment or suspension issues before they become larger problems.
