The 2009 GMC Trucks Sierra 2500 HD sits in the heavy-duty pickup market as a truck built for real towing, hauling, and work-focused use, but it also carries the broad-shouldered stance and refinement buyers expected from a modern GMC HD platform. For tire selection, that matters because this truck uses radial fitments in two different sizes: 245/75R16 and 265/70R17. That means the first step is confirming which wheel diameter is actually on the truck before comparing tire options. From there, the decision centers on matching the right load-capable tire to the vehicle’s wheel setup, sub-model, and intended road or light off-road use.
Which Tire Size Is Right for The 2009 GMC Trucks Sierra 2500 HD
The 2009 GMC Trucks Sierra 2500 HD uses two primary tire sizes, and the correct one depends on the truck’s exact sub-model and wheel diameter. Both fitments are radial truck tires, but one is built around a 16-inch rim and the other around a 17-inch rim. Before choosing a tire, confirm whether the truck is equipped with 16-inch or 17-inch wheels and then match that to the specific cab and trim configuration.
245/75R16 is a metric radial size in which 245 identifies the nominal section width in millimeters, 75 is the aspect ratio, R denotes radial construction, and 16 is the rim diameter in inches. On the 2009 GMC Trucks Sierra 2500 HD, this size serves as one of the primary heavy-duty fitments and is used across several SLE and WT configurations. Available choices in this size include a BFGoodrich All-Terrain T/A KO2 with raised white letter styling. It is a practical size to consider when the truck is equipped with 16-inch wheels and the goal is to keep the intended wheel diameter and truck-oriented tire profile.
265/70R17 is a metric radial size where 265 represents the nominal section width in millimeters, 70 is the aspect ratio, R indicates radial construction, and 17 identifies the rim diameter in inches. For the 2009 GMC Trucks Sierra 2500 HD, this size appears on several SLE and SLT configurations and brings the selection process back to confirming the truck’s actual 17-inch wheel setup. BFGoodrich All-Terrain T/A KO2 options are available in this size with raised white letter sidewalls and different load-capacity specifications. It is the size to evaluate when the truck carries 17-inch wheels and needs a matching HD-capable tire choice.
Sub-model fitment on the 2009 GMC Trucks Sierra 2500 HD is not completely uniform, because some configurations use only one size while others may use either 245/75R16 or 265/70R17. Checking the exact cab and trim combination is important before choosing a tire, especially since the two sizes use different rim diameters.
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2009 GMC Trucks Sierra 2500 HD SLE Crew Cab
The SLE Crew Cab can use either of the Sierra 2500 HD’s primary radial tire sizes, so wheel diameter needs to be confirmed before moving forward. Tire selection here starts with identifying whether the truck is on 16-inch or 17-inch wheels and then comparing the available truck tire specifications in that matching size.
The SLE Ext. Cab also spans both primary radial fitments, which means there is no single size to assume without checking the truck itself. The practical step is to verify the installed wheel diameter first, then choose the matching tire size and load specification for the way the truck is used.
The SLE Reg. Cab uses the 245/75R16 radial fitment, keeping tire selection focused on 16-inch wheel compatibility. That makes the decision more straightforward, with attention shifting to rim-width suitability, load capacity, and the kind of truck use the tire will see.
The SLE w/Z71 Pkg. can be equipped with either 245/75R16 or 265/70R17 radial tires, so the truck’s current wheel setup should be confirmed before ordering. Once that is established, the remaining decision is choosing the tire specification that matches the truck’s duty cycle and wheel size.
The SLT Crew Cab is another configuration that may use either primary Sierra 2500 HD tire size rather than one fixed fitment. Tire selection should begin with verifying whether the truck has 16-inch or 17-inch wheels, then narrowing the choice by load capacity and intended use.
The SLT Ext. Cab uses the 265/70R17 radial size, so the tire search centers on 17-inch fitment rather than the smaller wheel package. That simplifies the process to comparing the available 265/70R17 options and making sure the selected tire matches the truck’s working load requirements.
The SLT w/Z71 Pkg. can use either of the two primary radial tire sizes found on this Sierra 2500 HD platform. Because both 16-inch and 17-inch fitments are possible, the safest approach is to confirm the current wheel diameter and then evaluate the available truck tire specifications in that exact size.
The WT Crew Cab uses the 245/75R16 radial fitment, so the correct tire decision begins and ends with the 16-inch wheel setup. With the size established, the main considerations become tire construction, load rating, rim-width compatibility, and whether the truck sees mostly highway or mixed-surface service.
The WT Ext. Cab uses 245/75R16 radial tires, giving it a straightforward fitment path tied to 16-inch wheels. Buyers can focus on choosing an appropriate truck tire within that size while checking wheel width, tire condition, and the demands of towing, hauling, or everyday work use.
The WT Reg. Cab uses the 245/75R16 radial size, which keeps fitment centered on the 16-inch wheel package. That makes tire choice more about selecting the right load-capable option in the proper size and confirming the truck has not been altered with a different wheel setup.
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 2009 GMC Trucks Sierra 2500 HD Tires for Sale
Available products for the 2009 GMC Trucks Sierra 2500 HD focus on BFGoodrich All-Terrain T/A KO2 tires in both primary sizes. The visible comparison points are wheel-size match, load-capacity specification, rim-width compatibility, and raised white letter sidewall presentation.
Common questions for the 2009 GMC Trucks Sierra 2500 HD usually center on which tire size belongs on a specific sub-model, how 16-inch and 17-inch wheel setups differ, and what to inspect before putting an HD truck back into regular road use.
Tire Size & Fitment
What tire size fits a 2009 GMC Trucks Sierra 2500 HD?
A 2009 GMC Trucks Sierra 2500 HD uses either 245/75R16 or 265/70R17 radial tires. The correct size depends on the truck’s exact sub-model and wheel package, because some configurations use only one of those sizes while others can be equipped with either one.
The key step is to confirm the wheel diameter actually on the truck before choosing a tire. A 16-inch wheel requires 245/75R16, while a 17-inch wheel requires 265/70R17. If the truck has been changed from its original wheel setup, check the wheel diameter, wheel width, and available clearance rather than relying on trim level alone.
What size rim does a 2009 GMC Trucks Sierra 2500 HD use?
The 2009 GMC Trucks Sierra 2500 HD uses either a 16-inch or 17-inch rim, depending on the tire size and configuration. The 245/75R16 fitment is built around a 16-inch rim, and the 265/70R17 fitment is built around a 17-inch rim.
That distinction matters because tire size and rim diameter must match exactly. Before replacing tires, read the current tire sidewall and verify the wheel size on the truck. If the Sierra has aftermarket wheels, confirm both diameter and width so the selected tire matches the wheel properly and maintains adequate steering and fender clearance.
Do all 2009 GMC Trucks Sierra 2500 HD sub-models use the same tire size?
No, not all 2009 GMC Trucks Sierra 2500 HD sub-models use the same tire size. Some versions, including several WT and SLE regular-cab or work-truck configurations, use 245/75R16 only, while certain SLT configurations use 265/70R17 and several other sub-models can appear with either size.
That means trim name alone is not always enough to choose a tire. Crew Cab, Extended Cab, and Z71-equipped trucks may overlap across both wheel packages, so it is smart to confirm the exact sub-model and then verify the actual wheel diameter on the vehicle. Doing both prevents ordering a correct-looking size for the wrong wheel.
Choosing the Right Tire
What should I consider when choosing a 245/75R16 tire for a 2009 GMC Trucks Sierra 2500 HD?
Start by making sure 245/75R16 is the correct size for the truck’s wheel package and sub-model. For the 2009 GMC Trucks Sierra 2500 HD, this size is a radial fitment on a 16-inch rim, and the available BFGoodrich option uses raised white letter sidewalls with a truck-oriented all-terrain design.
After confirming size, compare rim-width compatibility, load capacity, and how the truck is actually used. A heavy-duty pickup that sees towing, hauling, or mixed-surface driving places different demands on a tire than one used mostly unloaded on pavement. Also check whether the truck still has its original wheel setup before settling on a replacement.
What brands offer tires for the 2009 GMC Trucks Sierra 2500 HD?
The available tires for the 2009 GMC Trucks Sierra 2500 HD come from BFGoodrich. Both 245/75R16 and 265/70R17 selections are represented by the All-Terrain T/A KO2 series, which keeps the brand choice simple and shifts the comparison toward size, load specification, and wheel compatibility.
Because the available products stay within one brand and one series, the more useful comparison is between the actual tire specifications. On this truck, that means confirming the correct wheel diameter first, then comparing the load-capacity version that matches the truck’s working role. Tire choice on an HD pickup is as much about fitment and use as branding.
What sidewall styles are available for 2009 GMC Trucks Sierra 2500 HD tires?
The available tires for the 2009 GMC Trucks Sierra 2500 HD use RWL sidewalls, meaning raised white letters. That styling appears on the BFGoodrich All-Terrain T/A KO2 options offered in the applicable 16-inch and 17-inch sizes for this truck.
Sidewall style affects appearance more than fitment, but it can still matter on a truck with a specific visual goal. Raised white letters give the Sierra a more traditional all-terrain look than a plain black sidewall would. Even so, sidewall treatment should come after the essentials of correct size, wheel match, and the load demands placed on the truck.
Restoration & Appearance
Which tire should I choose for a period-style 2009 GMC Trucks Sierra 2500 HD?
For a period-style 2009 GMC Trucks Sierra 2500 HD, the starting point is the tire size and wheel diameter that belong on the truck’s exact configuration: either 245/75R16 or 265/70R17. Since this is a modern heavy-duty pickup, keeping the correct radial sizing and a truck-appropriate tread pattern does more for the overall look than chasing a vintage-style construction.
Appearance still needs to stay grounded in fitment. A truck that keeps its original-style wheel diameter and uses an all-terrain radial with the right proportions will usually look more at home than one wearing an arbitrary substitute size. For buyers concerned with originality, trim-specific factory literature and marque references are worth checking before making cosmetic decisions.
Does correct tire fitment matter for a 2009 GMC Trucks Sierra 2500 HD restoration?
Yes, correct tire fitment matters on a 2009 GMC Trucks Sierra 2500 HD restoration because the wheel-and-tire package has a major effect on stance, function, and how authentic the finished truck appears. Using the proper 16-inch or 17-inch size for the truck’s configuration helps preserve the proportions expected of a Sierra 2500 HD.
Fitment also affects more than appearance on a heavy-duty pickup. An incorrect size can create issues with wheel compatibility, load support, or clearance under work conditions. Even on a cosmetic restoration, it is smart to verify the truck’s actual wheel setup, compare the replacement tire’s specifications carefully, and avoid assuming every HD trim used the same package.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2009 GMC Trucks Sierra 2500 HD?
Yes, modifications can affect tire fitment on a 2009 GMC Trucks Sierra 2500 HD. Changes such as aftermarket wheels, different wheel widths, suspension lifts or lowering, and body or steering alterations can all influence which tire size works properly, even when the truck originally used either 245/75R16 or 265/70R17.
A modified truck should be checked as it sits, not just by model year and trim. Confirm wheel diameter, wheel width, and available clearance at full steering lock and suspension movement before replacing tires. That is especially important on a heavy-duty pickup, where towing, payload, and rougher-use conditions can expose small fitment issues very quickly.
What should I inspect before driving a 2009 GMC Trucks Sierra 2500 HD on new tires?
Before driving a 2009 GMC Trucks Sierra 2500 HD on new tires, inspect the wheel condition, lug hardware, valve stems, and tire pressure, then confirm the installed tire size matches the truck’s 16-inch or 17-inch wheel setup. It is also worth checking that the tires clear the suspension, steering components, and fenders properly.
A broader pre-drive inspection is smart on any HD truck, especially one that has been parked or used intermittently. Look for uneven wear, alignment issues, damaged wheels, and signs of suspension or steering looseness that could affect how the new tires track. A short road test followed by a recheck of pressure and hardware torque adds another layer of caution.
How often should tires on a 2009 GMC Trucks Sierra 2500 HD be inspected?
Tires on a 2009 GMC Trucks Sierra 2500 HD should be inspected regularly, with a quick visual check before routine driving and a more careful inspection before towing, hauling, or taking a longer trip. On a heavy-duty truck, pressure, tread wear, cuts, punctures, and sidewall damage deserve close attention.
Trucks that sit for stretches should also be checked for age-related issues such as cracking, flat spotting, or slow air loss. Inspection matters even more when the Sierra is used under load, because an underinflated or damaged tire is working much harder in that environment. Consistent checks help catch problems before they become clearance, handling, or durability concerns.
