2025 GMC Sierra 1500 — Tire Size & Pressure Guide

As an ASE-certified master technician, I regularly field questions from truck owners looking to upgrade or replace the rubber on their rigs. The 2025 GMC Sierra 1500 is a highly versatile half-ton pickup, offering everything from a stripped-down work truck to the ultra-luxurious Denali Ultimate and off-road-ready AT4X. Because of this variety, GMC equips the Sierra 1500 with a wide range of tire and wheel combinations.

Here is your comprehensive guide to the tire sizes, pressures, and wheel specs for the 2025 GMC Sierra 1500.

Quick answer

Here are the standard specifications for the 2025 GMC Sierra 1500 (specs may vary slightly depending on your specific trim and package):

• OEM Tire Sizes: 255/70R17, 275/65R18, 275/60R20, or 275/50R22
• Recommended Cold Tire Pressure: 35 PSI front / 35 PSI rear (Standard load). Always verify with the driver-side door jamb placard.
• Bolt Pattern: 6x139.7 (6x5.5")
• Wheel Size: 17x8.0 to 22x9.0 (Offset typically ranges from +24mm to +28mm)
• Load Index / Speed Rating: Ranges from 112T to 116S (LT-metric tires on AT4/AT4X have higher load ratings)
• Spare Tire Size: 255/80R17 or matching full-size spare (AT4/AT4X)
• TPMS Frequency: 433 MHz

Tire sizes by trim

The Sierra 1500 has a diverse lineup. Below are the standard and optional tire sizes by trim level for the 2025 model year:

Note: AT4 and AT4X models come equipped with LT-metric (Light Truck) tires designed for off-road durability, which carry different load characteristics than the standard P-metric (Passenger) tires on other trims.

Recommended replacement tires

When it is time to replace your Sierra's tires, your choice should reflect how you use the truck—whether that is highway commuting, heavy towing, or off-roading. Here are some of the most reliable options:

• Michelin Defender LTX M/S 2 (Premium): The gold standard for highway cruising and light towing. They offer unmatched tread life, a whisper-quiet ride, and excellent wet traction.
• Falken Wildpeak A/T4W (Mid-Range/Premium): A fantastic all-terrain tire that provides aggressive off-road styling and grip without sacrificing on-road manners. Excellent in snow (3PMSF rated).
• BFGoodrich All-Terrain T/A KO3 (Premium): The quintessential heavy-duty all-terrain tire. Perfect for AT4/AT4X owners or anyone spending significant time on dirt and gravel.
• Cooper Discoverer HT3 (Budget/Mid-Range): A great value for 2WD or street-driven Sierras, offering solid durability and comfort at a lower price point.

When to inflate to max load psi

While the 2025 Sierra 1500 is a half-ton truck (not a Heavy Duty 2500/3500), tire pressure adjustment is still critical when towing or hauling heavy payloads.

For daily driving empty, stick to the 35 PSI recommended on the door placard for standard P-metric tires. However, if your Sierra is equipped with LT-metric tires (common on the AT4) or you are maxing out the payload/towing capacity, you should increase the rear tire pressure to stabilize the load. LT tires often require 45-50 PSI when loaded to prevent sidewall flex and excessive heat buildup. Always check the max cold pressure stamped on the tire sidewall (often 44 PSI for P-metric, up to 80 PSI for Load Range E LT tires) and never exceed it.

Lug nut torque & pattern

Proper wheel installation is a critical safety factor. The 2025 GMC Sierra 1500 uses a 6x139.7 (6x5.5") bolt pattern.

• Lug Nut Torque: 140 lb-ft (190 Nm)
• Thread Size: M14 x 1.5

Always use a calibrated torque wrench and tighten the lug nuts in a crisscross (star) pattern to ensure even seating of the wheel. Re-torque the lug nuts after 50 to 100 miles of driving following a wheel removal.

Common tire issues for this vehicle

1. Irregular Wear from Worn Shocks: The Sierra’s independent front suspension can cause cupping on the inside edge of the front tires if the front struts begin to fail or if the tires aren't rotated every 5,000 to 7,500 miles.
2. TPMS Relearn Requirements: When rotating tires on the Sierra, the TPMS sensors must be recalibrated to their new positions using a TPMS reset tool. Otherwise, the dash will display incorrect pressure locations.
3. Vibration at Highway Speeds: The massive 22-inch wheels on Denali Ultimate models are prone to bending from potholes. A bent rim or thrown wheel weight will cause a noticeable steering wheel shimmy between 65 and 75 mph. Road-force balancing is highly recommended for these larger wheel assemblies.

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