2019 GMC Sierra 2500HD Tire Size & Pressure Guide

As an ASE-certified master technician, I regularly service heavy-duty trucks like the 2019 GMC Sierra 2500HD. Whether you are hauling a fifth-wheel trailer, loading up the bed with construction materials, or just looking to upgrade your truck's stance, having the correct tire and wheel specifications is crucial for safety and performance. Below is your comprehensive guide to the 2019 GMC Sierra 2500HD tire sizes, pressures, and wheel specs.

Quick answer

Here are the essential tire and wheel specifications for the 2019 GMC Sierra 2500HD:

• OEM Tire Sizes: LT245/75R17, LT265/70R17, LT265/70R18, LT275/65R18, or LT265/60R20 (depending on trim/options).
• Recommended Cold Tire Pressure: Typically 60 PSI Front / 70 to 80 PSI Rear (always verify with the driver's side door jamb placard, as it varies by exact tire size and cab configuration).
• Bolt Pattern: 8x180 mm
• Wheel Size: 17x7.5, 18x8.0, or 20x8.5 (Offset ranges from +44mm)
• Load Index / Speed Rating: Load Range E (10-ply rated), Index 121/123, Speed Rating S or R.
• Spare Tire Size: Matches OEM or LT265/70R17/LT265/70R18 (depending on primary wheel size).
• TPMS Frequency: 315 MHz or 433 MHz (depending on specific build date and options; verify via VIN).

Tire sizes by trim

Tire sizes on the 2019 Sierra 2500HD vary based on the trim level and optional packages. Here is a breakdown of the factory offerings:

Recommended replacement tires

When replacing tires on a heavy-duty truck, you need rubber that can handle immense torque and heavy payload capacities. Here are top recommendations based on different needs and price tiers:

1. Michelin Defender LTX M/S (Premium) – Exceptional highway ride quality, long tread life, and excellent wet traction. Perfect for frequent towing on paved roads.
2. BFGoodrich All-Terrain T/A KO2 (Premium) – A legendary all-terrain tire with a tough sidewall. Great for work sites, off-roading, and snow (3-Peak Mountain Snowflake rated).
3. Falken Wildpeak A/T3W (Mid-Tier) – Offers an aggressive look and fantastic wet/snow performance at a more accessible price point.
4. Cooper Discoverer HT3 (Budget-Friendly) – A solid commercial-grade highway tire that offers good durability and payload support without breaking the bank.

When to inflate to max load psi

Because the 2019 GMC Sierra 2500HD is a heavy-duty truck, managing tire pressure based on load is highly important.

Your door placard will typically recommend around 60 PSI for the front tires and 70-80 PSI for the rear tires to accommodate maximum payload and towing capacities.

• Unloaded: If you are driving the truck empty for extended periods, running the rear tires at 80 PSI will result in a very harsh, bouncy ride and can cause premature center-tread wear. Some drivers lower the rear PSI to 60-65 PSI for comfort when empty.
• Max Load: When hooking up a heavy gooseneck trailer or filling the bed to its gross vehicle weight rating (GVWR), you must inflate the rear tires to the maximum cold pressure listed on the door placard (usually 80 PSI for Load Range E tires). This prevents excessive sidewall flexing, which generates dangerous heat and can lead to a blowout.

Note: The TPMS system is calibrated for the factory-recommended pressures. Dropping pressure for an unloaded ride may trigger the TPMS warning light.

Lug nut torque & pattern

Proper wheel installation is a critical safety factor for a 3/4-ton truck.

• Bolt Pattern: 8x180 mm (GM switched to this pattern for HD trucks in 2011; do not attempt to use older 8x165.1 / 8x6.5 wheels).
• Lug Nut Torque: 140 lb-ft.
• Procedure: Always use a calibrated torque wrench. Tighten in a crisscross (star) pattern to ensure even clamping force across the brake rotor and hub. Retorque the lug nuts after 50 to 100 miles of driving following a wheel removal.

Common tire issues for this vehicle

1. Premature Front Edge Wear: The heavy Duramax diesel engine (if equipped) puts massive weight on the front suspension. If the truck's alignment is slightly off, or if you fail to rotate tires every 5,000 to 7,000 miles, the front tires will quickly wear on the outer edges.
2. TPMS Sensor Failure: The batteries in TPMS sensors typically last 5-7 years. For a 2019 model, you may begin seeing sensor failures soon. Always replace the sensors in sets when getting new tires to save on future labor costs.
3. Cupping from Bad Shocks: Heavy towing takes a toll on factory shock absorbers. If your shocks wear out, the rear tires may begin to cup or scallop, leading to a loud, vibrating ride.

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