The 2019 GMC Trucks Sierra 3500 HD sits in the heavy-duty pickup segment where towing, hauling, and chassis configuration matter just as much as trim level. Buyers looking at this truck usually need to sort out more than appearance alone, because wheel and tire fitment changes with the exact setup. This Sierra 3500 HD uses radial tires in two primary sizes, 235/80R17 and 265/70R18, with the difference tied directly to specific sub-models and dual-rear-wheel configurations. That makes the real tire decision less about style and more about confirming the truck's exact trim, rear-wheel arrangement, and rim diameter before comparing available replacements.
Which Tire Size Is Right for The 2019 GMC Trucks Sierra 3500 HD
The 2019 GMC Trucks Sierra 3500 HD uses two primary tire sizes, and the correct choice depends on the exact sub-model and wheel setup. Both are radial tires, but they do not share the same rim diameter, so the first step is confirming whether the truck uses the 17-inch DRW fitment or the 18-inch single-rear-wheel fitment before selecting a tire.
235/80R17 is a metric radial size in which 235 identifies the nominal section width in millimeters, 80 is the aspect ratio, R marks radial construction, and 17 is the wheel diameter in inches. On the 2019 GMC Trucks Sierra 3500 HD, this size is used on DRW configurations, making it a fitment tied to the truck's dual-rear-wheel setup rather than every version of the model. The available product in this size is a BFGoodrich All-Terrain T/A KO2 with an RBL sidewall. This size should be evaluated by owners who need the correct 17-inch DRW fitment and want to confirm wheel width and intended truck use before replacement.
265/70R18 is a metric radial size where 265 is the nominal section width in millimeters, 70 is the aspect ratio, R indicates radial construction, and 18 identifies the wheel diameter in inches. On the 2019 GMC Trucks Sierra 3500 HD, this size applies to several non-DRW sub-models, so it belongs to specific single-rear-wheel configurations rather than the full Sierra 3500 HD range. Tire selection in this size starts with confirming that the truck actually carries the 18-inch wheel package. That matters because moving between the 17-inch and 18-inch fitments is not just a matter of preference; the wheel diameter and truck configuration must match.
Tire fitment on the 2019 GMC Trucks Sierra 3500 HD varies by sub-model, with the biggest split following DRW versus non-DRW configurations. Checking the exact trim and rear-wheel setup is essential, because the truck uses both 17-inch and 18-inch fitments across the range.
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2019 GMC Trucks Sierra 3500 HD (DRW)
The 2019 GMC Trucks Sierra 3500 HD (DRW) uses the 235/80R17 radial size. That makes wheel diameter and dual-rear-wheel configuration the key checks before comparing replacement tires for work use or general road service.
The 2019 GMC Trucks Sierra 3500 HD Base uses the 265/70R18 radial size. Tire selection begins with confirming the 18-inch wheel setup, then comparing available replacements that suit how the truck is actually used.
The 2019 GMC Trucks Sierra 3500 HD Denali uses the 265/70R18 radial size. For this sub-model, the main concern is matching the 18-inch fitment and verifying that any replacement still suits the truck's wheel and duty cycle.
The 2019 GMC Trucks Sierra 3500 HD Denali (DRW) uses the 235/80R17 radial size. Owners should treat this as a DRW-specific fitment and confirm the wheel setup before choosing a replacement tire.
2019 GMC Trucks Sierra 3500 HD Denali Snow Plow Prep Pkg.
The 2019 GMC Trucks Sierra 3500 HD Denali Snow Plow Prep Pkg. uses the 265/70R18 radial size. Selecting a tire here starts with the correct 18-inch fitment, then moves to matching the truck's working role and wheel compatibility.
2019 GMC Trucks Sierra 3500 HD Denali Snow Plow Prep Pkg. (DRW)
The 2019 GMC Trucks Sierra 3500 HD Denali Snow Plow Prep Pkg. (DRW) uses the 235/80R17 radial size. Because it is a DRW application, buyers should confirm both the 17-inch wheel diameter and the truck's rear-wheel configuration before replacement.
The 2019 GMC Trucks Sierra 3500 HD SLE uses the 265/70R18 radial size. The practical next step is confirming the truck still has its 18-inch wheel setup, especially if wheels or suspension have been changed.
The 2019 GMC Trucks Sierra 3500 HD SLE (DRW) uses the 235/80R17 radial size. This points buyers toward the 17-inch DRW fitment, where wheel compatibility matters more than appearance-based tire shopping.
2019 GMC Trucks Sierra 3500 HD SLE Snow Plow Prep Pkg.
The 2019 GMC Trucks Sierra 3500 HD SLE Snow Plow Prep Pkg. uses the 265/70R18 radial size. Tire choice should start with the confirmed 18-inch setup and then focus on the kind of road and work use the truck sees.
2019 GMC Trucks Sierra 3500 HD SLE Snow Plow Prep Pkg. (DRW)
The 2019 GMC Trucks Sierra 3500 HD SLE Snow Plow Prep Pkg. (DRW) uses the 235/80R17 radial size. Replacement selection should stay centered on the DRW-specific 17-inch fitment and the truck's actual wheel package.
The 2019 GMC Trucks Sierra 3500 HD SLT uses the 265/70R18 radial size. That means buyers should verify the 18-inch wheel fitment first, then compare tire choices based on intended hauling, towing, and road use.
The 2019 GMC Trucks Sierra 3500 HD SLT (DRW) uses the 235/80R17 radial size. The important step is confirming the truck's DRW configuration so the replacement tire matches the correct wheel diameter and application.
2019 GMC Trucks Sierra 3500 HD SLT Snow Plow Prep Pkg.
The 2019 GMC Trucks Sierra 3500 HD SLT Snow Plow Prep Pkg. uses the 265/70R18 radial size. Tire selection should remain focused on proper 18-inch wheel fitment and the truck's actual use rather than trim level alone.
2019 GMC Trucks Sierra 3500 HD SLT Snow Plow Prep Pkg. (DRW)
The 2019 GMC Trucks Sierra 3500 HD SLT Snow Plow Prep Pkg. (DRW) uses the 235/80R17 radial size. Buyers should confirm the 17-inch DRW wheel setup first, then compare tires that match the truck's working demands.
2019 GMC Trucks Sierra 3500 HD Snow Plow Prep Pkg.
The 2019 GMC Trucks Sierra 3500 HD Snow Plow Prep Pkg. uses the 265/70R18 radial size. For this configuration, the right starting point is the 18-inch wheel fitment, followed by a careful look at the truck's intended service.
2019 GMC Trucks Sierra 3500 HD Snow Plow Prep Pkg. (DRW)
The 2019 GMC Trucks Sierra 3500 HD Snow Plow Prep Pkg. (DRW) uses the 235/80R17 radial size. This is a DRW-specific tire fitment, so wheel diameter and truck configuration should be confirmed before replacement.
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 3500 HD Tires for Sale
Available product selection for the 2019 GMC Trucks Sierra 3500 HD currently centers on 235/80R17, including a BFGoodrich All-Terrain T/A KO2 radial with an RBL sidewall. Buyers can compare the product grid with close attention to rim-width compatibility, load capacity, and intended truck use.
Owners of a 2019 GMC Trucks Sierra 3500 HD usually need clear answers on tire size by sub-model, 17-inch versus 18-inch wheel fitment, and what to inspect before putting a heavy-duty truck back on the road. These FAQs focus on those exact concerns.
Tire Size & Fitment
What tire size fits a 2019 GMC Trucks Sierra 3500 HD?
The 2019 GMC Trucks Sierra 3500 HD uses two primary tire sizes: 235/80R17 and 265/70R18. Both are radial sizes, but they apply to different truck configurations rather than the full model line as a whole.
The key distinction is sub-model and rear-wheel setup. DRW versions use 235/80R17, while several non-DRW trims use 265/70R18. Before choosing a replacement, confirm the exact trim, check whether the truck is dual rear wheel or single rear wheel, and verify the wheel diameter currently on the truck.
What size rim does a 2019 GMC Trucks Sierra 3500 HD use?
A 2019 GMC Trucks Sierra 3500 HD uses either a 17-inch or 18-inch rim, depending on the tire size and truck configuration. The 235/80R17 fitment uses a 17-inch rim, while the 265/70R18 fitment uses an 18-inch rim.
That rim difference is one of the most important fitment checks on this truck. A buyer should not choose a tire by overall appearance alone, because the correct rim diameter must match the wheel already on the vehicle. Checking the sidewall size and measuring the wheel if needed helps prevent ordering the wrong fitment.
Why does the 2019 GMC Trucks Sierra 3500 HD have more than one tire size?
The 2019 GMC Trucks Sierra 3500 HD has more than one tire size because fitment changes with the truck's exact configuration. The main dividing line is DRW versus non-DRW models, which use different wheel and tire combinations.
That means the right choice is tied to how the truck was built, not just the Sierra 3500 HD nameplate. Snow Plow Prep Package trims also follow those same configuration-based fitments. Matching the tire to the truck starts with identifying the sub-model and confirming whether the truck still has its original wheel setup.
Choosing the Right Tire
What should I consider when choosing a tire for a 2019 GMC Trucks Sierra 3500 HD?
Start with the correct size for the exact truck: 235/80R17 for DRW versions or 265/70R18 for several non-DRW trims. From there, compare construction, wheel compatibility, load capacity, and the kind of work the truck actually does.
A heavy-duty pickup places more importance on fitment discipline than casual appearance changes. Check the wheel diameter already on the truck, confirm that the tire suits the truck's hauling or towing role, and review details such as rim-width compatibility. Trucks with aftermarket wheels or suspension changes should be measured carefully before replacement.
What brands offer tires for the 2019 GMC Trucks Sierra 3500 HD?
Current product coverage for the 2019 GMC Trucks Sierra 3500 HD includes BFGoodrich in 235/80R17. The available product in that size is the All-Terrain T/A KO2 radial, which gives buyers a clearly defined option in the 17-inch DRW fitment.
Brand selection only matters after the size and wheel setup are confirmed. On this truck, choosing the wrong diameter or the wrong DRW versus non-DRW fitment is a bigger mistake than picking between brands. Once the fitment is settled, compare product details such as sidewall style, rim-width range, and load specification.
How do I choose between the available 235/80R17 tires for a 2019 GMC Trucks Sierra 3500 HD?
For a 2019 GMC Trucks Sierra 3500 HD that uses 235/80R17, begin by confirming the truck is a DRW model with 17-inch wheels. Then compare the tire's radial construction, load specification, rim-width range, and tread character against how the truck is actually used.
The available 235/80R17 option includes a BFGoodrich All-Terrain T/A KO2 with an RBL sidewall, a 6.0 to 7.5 inch rim-width range, and a maximum load rating of 3,085 lbs @ 80 psi. Those details help narrow the decision, but they still need to be checked against the truck's wheel and service requirements.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 GMC Trucks Sierra 3500 HD?
Yes. Modifications can affect tire fitment on a 2019 GMC Trucks Sierra 3500 HD even when the tire size looks close to the original specification. Wheel changes, altered offset, suspension lifts or drops, and body modifications can all change clearance and usable fitment.
This matters even more on a heavy-duty truck because the correct fitment is tied to both configuration and wheel diameter. A truck that originally used 235/80R17 or 265/70R18 should be checked carefully if aftermarket wheels have been installed. Clearance at the fenders, steering components, and under load should all be verified before road use.
What should I inspect before driving a 2019 GMC Trucks Sierra 3500 HD on new tires?
Before driving a 2019 GMC Trucks Sierra 3500 HD on new tires, inspect the wheel diameter, confirm the tire size matches the truck's exact configuration, and check inflation pressure, lug torque, and visible clearance. It is also wise to look over the valve stems and wheel condition.
A heavy-duty pickup benefits from a thorough first-use check because the wrong setup can show up quickly under load. Recheck for rubbing during steering and suspension movement, and watch for uneven stance or contact issues on DRW trucks. After the first miles, confirm pressure stability and inspect for any signs of interference.
What should I check before a longer drive in a 2019 GMC Trucks Sierra 3500 HD?
A longer drive in a 2019 GMC Trucks Sierra 3500 HD calls for a careful review of tire condition, inflation, and fitment. Look for cuts, bulges, irregular wear, cracking, or slow air loss, and make sure the tire size matches the truck's actual wheel and rear-wheel configuration.
Longer trips place more demand on a truck that may be towing, hauling, or carrying equipment. It helps to inspect the wheels, confirm the tires have proper clearance at full steering lock, and make sure pressures are appropriate before departure. On a lower-use truck, age and storage condition deserve as much attention as tread depth.
