2025 GMC Sierra 2500HD Tire Size & Pressure
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Quick Answer
- OEM Tire Size: 275/70R18, 275/65R20, 295/60R20, 275/60R20 (varies by trim and package)
- Recommended Cold Tire Pressure (Door Placard): Typically 60-80 PSI (front/rear, varies significantly by load and specific tire). Always check your door jamb placard.
- Bolt Pattern: 8x180mm
- Wheel Size: 18x8", 20x8.5", 20x9" (varies by trim and package)
- Load Index/Speed Rating: Varies greatly by tire and trim, but typically Load Range E (10-ply equivalent) with a speed rating of R or S.
- Spare Tire Size: Full-size spare, typically matching one of the OEM tire sizes.
- TPMS Frequency: 315 MHz or 433 MHz (often varies by region/specific sensor, always confirm with a TPMS tool or dealer)
Tire Sizes By Trim
The 2025 GMC Sierra 2500HD, being a heavy-duty workhorse, offers a range of tire and wheel combinations to suit various needs and trim levels. Here\
More specs for the 2025 GMC Sierra 2500HD
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
2014 Sierra 2500HD
2015 Sierra 2500HD
2016 Sierra 2500HD
2017 Sierra 2500HD
2018 Sierra 2500HD
2019 Sierra 2500HD
Maintenance & repair guides
2025 GMC Sierra 2500HD Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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