The 2008 GMC Trucks Yukon sits in the full-size SUV segment where towing strength, passenger room, and everyday road comfort all matter. In this generation, the Yukon also spans luxury-leaning Denali models, an early full-size Hybrid, and more utility-focused SLE and SLT configurations, so tire fitment is tied closely to trim and wheel package. This Yukon uses radial tires, with three primary sizes across the model range: 265/70R17, 265/65R18, and 275/55R20. That makes the real decision less about vintage construction and more about matching the correct size to the exact sub-model, wheel diameter, and the kind of road use or appearance you want to preserve.
Which Tire Size Is Right for The 2008 GMC Trucks Yukon
Three tire sizes apply to the 2008 GMC Trucks Yukon, and they vary by sub-model and wheel diameter. The first step is confirming the exact Yukon trim and whether it rides on a 17-inch, 18-inch, or 20-inch wheel, since the right tire choice depends on that combination rather than on the Yukon name alone.
A 265/65R18 tire uses a 265 millimeter section width, a 65-series aspect ratio, radial construction, and an 18-inch rim. On the 2008 GMC Trucks Yukon, this size serves specific trims rather than the entire model line, so it should be matched to the correct sub-model and wheel setup. Its dimensions place it in the same general full-size SUV range as the other Yukon fitments while keeping the sizing tied to an 18-inch wheel. This is the size to evaluate when the vehicle already has the proper 18-inch wheels and the goal is to stay with the intended fitment range for that configuration.
A 275/55R20 tire is a metric radial size with a 275 millimeter section width, a 55-series profile, and a 20-inch rim diameter. On the 2008 GMC Trucks Yukon, it applies to certain upper-trim or alternate-wheel configurations, so it should not be treated as a universal Yukon fitment. Compared with the other Yukon sizes, the key distinction is the 20-inch wheel requirement rather than a change in construction, since all primary fitments here are radial. This size belongs in the conversation when the vehicle is already equipped with 20-inch wheels and the buyer wants to keep the existing wheel-and-tire relationship intact.
A 265/70R17 tire combines a 265 millimeter section width with a 70-series profile, radial construction, and a 17-inch rim. For the 2008 GMC Trucks Yukon, this size is tied to selected trims and is the only primary size here with product options currently represented in an all-terrain series. Available choices in this size include BFGoodrich All-Terrain T/A KO2 tires with raised white letter sidewalls. It is the size to focus on when the Yukon uses 17-inch wheels and the buyer wants to compare road-use needs such as load capacity, rim-width compatibility, and a more truck-oriented tire presentation.
Tire fitment varies across the 2008 GMC Trucks Yukon lineup, and some sub-models can use more than one size depending on wheel package. Checking the exact trim matters here because the right tire starts with the correct wheel diameter and associated size for that specific Yukon configuration.
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2008 GMC Trucks Yukon Denali
The 2008 GMC Trucks Yukon Denali uses radial tires and can be equipped with either 265/65R18 or 275/55R20, depending on wheel setup. That makes wheel confirmation especially important before selecting a replacement tire, since both sizes belong to Denali but require different rim diameters.
The 2008 GMC Trucks Yukon Hybrid uses the 265/65R18 radial size. Tire selection for this sub-model is mainly about staying with the correct 18-inch fitment and confirming that the vehicle still wears the intended wheel package if any changes have been made over time.
The 2008 GMC Trucks Yukon SLE uses the 265/70R17 radial tire size. This keeps the fitment straightforward, so the main task becomes choosing the right tire within that size while confirming wheel width, load needs, and whether the Yukon remains on its original 17-inch wheel setup.
The 2008 GMC Trucks Yukon SLT can use either 265/70R17 or 275/55R20 radial tires, depending on how the vehicle is equipped. Tire selection starts with identifying the actual wheel diameter on the SUV today, since both sizes belong to the SLT range but are not interchangeable without the matching wheel.
The 2008 GMC Trucks Yukon SLT w/Z71 Pkg. uses the 265/65R18 radial size. That keeps the fitment decision centered on maintaining the proper 18-inch sizing and verifying that the Yukon still has the wheel and suspension setup associated with that package.
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 2008 GMC Trucks Yukon Tires for Sale
Available product coverage centers on 265/70R17, where BFGoodrich All-Terrain T/A KO2 options are offered with raised white letter sidewalls, radial construction, and differing load capacities. For Yukon owners using this size, the product grid is where rim-width compatibility and specification differences become the main comparison points.
Owners of a 2008 GMC Trucks Yukon usually need to sort out trim-specific tire size, wheel diameter, and product choice first. The questions below focus on exact fitment, radial tire selection, appearance differences, and the checks worth making before regular road use.
Tire Size & Fitment
What tire size fits a 2008 GMC Trucks Yukon?
The 2008 GMC Trucks Yukon uses three primary tire sizes across its model range: 265/70R17, 265/65R18, and 275/55R20. All three are radial sizes, and the correct one depends on the specific Yukon sub-model and wheel package rather than on the Yukon name alone.
The most important next step is to confirm the exact trim and the wheel diameter currently on the vehicle. Denali and SLT models can use more than one size, so checking the sidewall on the existing tire and verifying whether the Yukon has 17-inch, 18-inch, or 20-inch wheels helps prevent choosing the wrong replacement.
What size rim does a 2008 GMC Trucks Yukon use?
A 2008 GMC Trucks Yukon can use 17-inch, 18-inch, or 20-inch rims, depending on sub-model and equipment. The 265/70R17 size uses a 17-inch rim, 265/65R18 uses an 18-inch rim, and 275/55R20 uses a 20-inch rim.
Rim diameter should be confirmed before anything else because the three Yukon tire sizes are tied directly to three different wheel diameters. It also helps to check actual wheel width when comparing replacement tires, especially if the vehicle has aftermarket wheels or if the original wheel package may have been changed at some point.
Do all 2008 GMC Trucks Yukon sub-models use the same tire size?
No. The 2008 GMC Trucks Yukon lineup does not use one universal tire size across every sub-model. SLE uses 265/70R17, Hybrid uses 265/65R18, SLT w/Z71 Pkg. uses 265/65R18, and Denali and SLT can each use more than one size depending on wheel setup.
That variation means trim identification matters before comparing products. A Yukon that shares the same body shape as another sub-model may still require a different tire because of wheel diameter, suspension package, or factory wheel choice, so the vehicle should be matched by exact sub-model and actual wheel size rather than by appearance.
Choosing the Right Tire
What should I consider when choosing a 265/70R17 tire for a 2008 GMC Trucks Yukon?
Start with the correct size, then compare construction, load capacity, rim-width compatibility, and the kind of use the Yukon sees. In 265/70R17, available options include BFGoodrich All-Terrain T/A KO2 tires, and those products differ in specifications such as load rating and weight while sharing radial construction.
That means the right choice is not just any 265/70R17 tire, but the one that suits the vehicle's wheel and duty cycle. A Yukon used for regular road driving, cargo hauling, or mixed on-road and light off-road use should be checked against the tire's rating details and the wheel dimensions already on the SUV.
What sidewall styles are available for 2008 GMC Trucks Yukon tires?
Within the currently represented Yukon product options, 265/70R17 is available with an RWL sidewall. RWL stands for raised white letter, giving the tire a more traditional truck and SUV appearance than a plain black sidewall presentation.
Sidewall style does not change the need to match the correct size and wheel diameter, but it can influence the overall look of the vehicle. Buyers who care about appearance should decide whether they want a more understated finish or a more pronounced performance-truck look, then compare that preference alongside the tire's specifications.
What brands offer tires for the 2008 GMC Trucks Yukon?
Among the available Yukon product options shown here, BFGoodrich is represented in the 265/70R17 size. The products in that size belong to the All-Terrain T/A KO2 series and are offered in radial construction with raised white letter sidewalls.
Brand is only one part of the decision. The more important comparison is whether the tire matches the Yukon sub-model, wheel diameter, and intended use, then whether the product's load capacity, rim-width range, and overall character suit the way the SUV is driven and maintained.
Restoration & Appearance
Which tire should I choose for a period-style 2008 GMC Trucks Yukon?
A period-style choice for a 2008 GMC Trucks Yukon starts with keeping the correct original fitment size for the exact sub-model and wheel package. On this vehicle, that means selecting the proper radial size first, whether 265/70R17, 265/65R18, or 275/55R20, rather than treating appearance as the only priority.
Once the size is correct, the visual character comes from the tire's sidewall treatment and overall tread personality. For owners who want a more era-appropriate SUV look, staying close to the established wheel diameter and sidewall proportion usually matters more than chasing a dramatically different wheel-and-tire package.
How does tire construction affect the appearance of a restored 2008 GMC Trucks Yukon?
On a 2008 GMC Trucks Yukon, the primary fitments are radial, so appearance changes come less from switching construction and more from staying in the proper size and wheel diameter. A tire that keeps the intended sidewall height and overall stance will usually preserve the vehicle's visual balance better than an off-size substitute.
Appearance is also shaped by sidewall styling, such as whether the tire uses raised white lettering or a more subdued presentation. A restoration-minded owner should confirm the exact trim and wheel setup first, then compare tire options that support the desired look without drifting away from the correct fitment range.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2008 GMC Trucks Yukon?
Yes. Modifications can change tire fitment on a 2008 GMC Trucks Yukon even when the tire size sounds close to stock. Aftermarket wheels, altered wheel width, suspension lifts or drops, and body or steering changes can all affect whether a given Yukon still has the same clearance and wheel requirements it left with.
That is especially important on Yukon trims that can use more than one factory size, because wheel diameter and package choice already introduce variation. Any modified vehicle should be checked for rim diameter, wheel width, rubbing at full steering lock, and suspension clearance before a replacement tire is selected.
What should I inspect before driving a 2008 GMC Trucks Yukon on new tires?
Before driving a 2008 GMC Trucks Yukon on new tires, inspect the wheels for damage, confirm the tire size matches the trim and wheel diameter, and make sure inflation pressure is set correctly for the installed tire. It also helps to look over the valve stems, lug hardware, and overall condition of the suspension and steering components.
A short test drive should include listening for rubbing and checking that the tires clear the fenders and inner wheel wells through turns and suspension movement. Rechecking air pressure and lug torque after the first miles is a sensible habit, especially if the Yukon has wheels that were recently mounted or changed.
How often should tires on a 2008 GMC Trucks Yukon be inspected?
Tires on a 2008 GMC Trucks Yukon should be inspected regularly, not only when tread wear becomes obvious. A visual check for cuts, cracking, bulges, irregular wear, and pressure loss is worthwhile before routine driving and especially before hauling passengers, cargo, or setting out on a longer highway trip.
Low-use vehicles deserve the same attention because age and storage conditions can matter as much as mileage. Looking at the sidewalls, checking inflation, and watching for wear patterns that suggest alignment or suspension issues helps catch problems early and keeps the Yukon closer to the fitment and road behavior intended by its tire size.
