Tire Size for 2015 Chevy Silverado 1500 | Stock Fitments

The 2015 Chevy Silverado 1500 factory tire sizes range from 17 to 22 inches, with P265/70R17, P265/65R18, and P275/55R20 being the most common depending on trim.

The tire size for 2015 Chevy Silverado 1500 varies by trim and wheel package, so knowing your truck’s factory fitment prevents clearance problems, speedometer errors, and unsafe loading. Your Silverado left the factory with one of several combinations depending on the trim level and options selected at purchase. Choosing the wrong replacement affects not just fit but also how the truck handles, brakes, and reads speed. Factory sizes span from 17-inch steel wheels on work trucks to 22-inch polished aluminum rims on the High Country. The door jamb placard on your specific truck is the definitive reference, but understanding the full range of factory options helps narrow the field whether you’re replacing tires or shopping for a used truck. The five trims — WT, LS, LT, LTZ, and High Country — each had their own standard and optional wheel packages, creating six distinct factory tire sizes across four wheel diameters.

What Factory Tire Sizes Came on the 2015 Silverado 1500?

GM offered the 2015 Silverado 1500 with a range of tire and wheel combinations depending on trim and packages. The official factory specification sheet from GM, dated August 2014, lists wheel diameters from 17 to 22 inches with specific tire sizes for each. Wheel construction varies from painted steel on base trims to bright machined aluminum and polished aluminum on higher trims, with widths ranging from 8 to 9 inches. The factory spec sheet listed five wheel types: 17 x 8-inch painted steel, 17 x 8-inch stainless steel-clad steel, 17 x 8-inch bright machined aluminum, 18 x 8.5-inch bright machined aluminum, and 20 x 9-inch polished aluminum. Each wheel type had a specific tire fitment from the factory.

The 17-inch category includes both P-metric passenger tires and LT-metric light truck tires. The LT265/70R17/C carries a higher load range for trucks used regularly in towing or hauling, while the P-metric versions deliver a quieter, more compliant ride for daily driving. The 18-inch P265/65R18 splits the difference, offering a balance of ride quality and capability on LT and LTZ trims. The 20-inch P275/55R20 is the most common upgrade-sized option and pairs well with LTZ and High Country trucks.

How to Verify the Correct Size Before Buying

No table of factory options replaces what’s on your specific truck because packages and regional builds differ. The tire and loading placard on the driver’s side door jamb lists the factory tire size, load index, speed rating, and recommended cold inflation pressure for your Silverado’s original equipment. That white sticker is the single authoritative source for your truck’s build — confirm against it before ordering anything. The placard also shows separate inflation pressures for front and rear tires, which change when the truck carries heavy loads.

On the current tire sidewall, the size string is easy to read once you know the format. The letter before the three-digit width tells you the tire type on some sizes, but the number after the R is the rim diameter in inches. Match that diameter, then check the load index and speed rating that follow the size. If the placard is missing or unreadable, contact a Chevrolet dealer with your VIN to get the original build sheet.

Factory wheel and tire data from GM’s official 2014 spec sheet confirms the original combinations used on the 2015 model year. That document lists specific wheel types — steel, stainless steel-clad steel, bright machined aluminum, and polished aluminum — with corresponding tire sizes for each, so you can verify whether a used truck still wears its original equipment or has been changed.

If your Silverado needs both tires and fresh wheels, our guide to the best 2015 Chevy Silverado rims covers tested options that maintain proper fitment for your trim while upgrading the look.

Common Fitment Mistakes and What to Watch For

Two tire sizes can look interchangeable on paper but differ enough to cause real problems. P275/55R20 and P285/45R22 share a similar width but the 22-inch tire is over an inch taller, which reduces clearance at the wheel wells and throws the speedometer off by several miles per hour at highway speeds. The 22-inch P285/45R22 is both wider and taller than any other factory option. Dropping to a 20-inch wheel from a 22-inch setup changes the stance noticeably and may leave a gap at the wheel well. Always cross-check against the door placard before assuming a size from an aftermarket website or forum will fit your truck.

Load index matters as much as diameter, especially for trucks used in towing or hauling. A Silverado that regularly pulls a trailer needs tires that match or exceed the OEM load rating. The LT265/70R17/C uses a C-range load capacity built for heavier work; the P-metric version of the same nominal size supports less weight and is not rated for the same loads.

Changing tire diameter also affects speedometer accuracy and transmission shift points on some configurations. A larger tire reads a slower speed