Yukon XL Tire Size Guide: What Size Tires Fit GMC Yukon XL?

GMC Yukon XL tire size ranges from P265/65R18 through 285/40R24/XL depending on model year, 1500 or 2500 series, trim, and wheel package.

Two Yukon XLs parked side by side can wear completely different tires, because the factory fitment splits by generation, by half-ton versus three-quarter-ton, and by the wheel diameter you ordered. The placard on the driver’s door jamb beats any chart online — including this one. What follows maps the documented factory sizes so you know what to look for before you shop.

Factory Yukon XL Tire Sizes By Generation

The current-generation Yukon XL runs 18- through 24-inch wheels, while older 1500 and 2500 models use distinct fitments that don’t cross over.

On the 2026 Yukon XL Elevation 2WD, GMC fits 20-inch machined and painted Satin Graphite wheels with P275/60R20 all-season tires. That build carries a 17-inch steel spare with a P265/70R17. Car and Driver’s independent 2026 spec sheet confirms 275/60R20SL front and rear, plus the same P265/70R17 spare.

Michelin’s US fitment database for the Yukon XL lists nine current-generation sizes: P265/65R18 112T, P265/65R18 112H, 265/65R18 114T, P275/55R20 111S, 275/60R20 115T, 275/60R20 115S, 275/50R22 111H, P285/45R22 110H, and 285/40R24/XL 112H.

Older Yukon XL 1500 models reach back further. Michelin’s 1500 database includes P235/75R15/XL, P245/75R16, LT245/75R16, P265/70R16, P265/70R17, P265/65R18, P275/55R20, P285/50R20, and P285/45R22, with load ratings and pressures varying by year and axle.

Yukon XL 2500 trucks use heavier rubber entirely. Common sizes include 245/75R16, 265/75R16, and 265/70R17, and Michelin lists LT245/75R16/E and LT265/70R17/E applications — some calling for substantially higher rear pressures than front.

How To Confirm The Right Size Before Buying

The door-jamb label is the authority for your specific truck; everything else is a starting point.

1. Read the tire-size and cold-inflation label on the driver’s door or door jamb.
2. Check the owner’s manual for approved sizes, load ranges, speed ratings, and spare-tire limits.
3. Write down the model year, 1500 or 2500 designation, trim, 2WD or 4WD, and wheel diameter.
4. Compare the full replacement designation — passenger or light-truck prefix, load index, speed symbol, and XL or load-range marking — not just width and diameter.
5. Have a tire professional confirm wheel width, offset, brake and suspension clearance, and spare compatibility.

When you’re ready to compare specific models in the sizes above, this roundup of tested tires for the Yukon XL saves a lot of cross-shopping.

Fitment Traps That Catch Yukon XL Owners

Matching numbers on the sidewall don’t guarantee a safe fit, and the differences matter most on the 2500.

• Identical nominal dimensions can hide differences in load index, construction, rim width, and clearance.
• Never swap a 1500 passenger tire onto a 2500 without confirming the required load capacity.
• Run the vehicle manufacturer’s cold pressure, not the number molded into the tire sidewall.
• Mixing sizes or rolling circumferences can upset anti-lock braking, traction control, stability control, and four-wheel-drive operation.
• Compact and temporary spares carry speed, distance, and drivetrain restrictions — the 2026 Elevation’s P265/70R17 spare is larger than a typical compact, but it still isn’t a permanent replacement for the P275/60R20 road set.

GMC’s own 2026 Yukon XL build and price page shows the factory wheel and tire package per trim.