2018 GMC Sierra 2500HD Dimensions, Sizes & Specifications
Based on 30 trims — exact values when identical, ranges when trims differ. Generation: Fourth generation (GMTK2XX).
Exterior dimension fields are not available for this model year in the catalog yet.
Explore your 2018 GMC Sierra 2500HD
Interactive systems diagram for this model year — measure, check fitment, and open the matching SpecSizes tools. Schematic only; not photorealistic body styling.
- Wheels
- Tires
- Wipers
Available for this vehicle
- Wheels
- Tires
- Wipers
Select a system below or on the diagram. This schematic marks measurement areas — it is not body-accurate styling.
Catalog summaries
Wheels: bolt pattern 8x180, bore 124.1 mm. Wheel sizes
Tires: 245/75R17, 265/60R20, 265/70R18. Tire sizes
What do you want to check?
- Compare this vehicleSize vs a competitor
- See size by yearModel history & chart
- Find cars similar in sizeExterior length, width & height neighbors
- Browse cars by sizeReverse-search by length, width & height
- Check tire sizeOEM tire sizes
- Check wiper sizeBlade lengths
- Check wheel sizeBolt pattern, bore, offset
- Wheel fitment & interchangeCompare donor or custom wheels
Weight & capacities
| Max towing capacity | 13,000 lb – 14,500 lb |
|---|
Wheels, tires & maintenance sizes
Tire sizes Full tire size page → · Wheel fitment →
- 245/75R17
- 265/60R20
- 265/70R18
Wiper sizes Full wiper size page →
- Driver22"
- Passenger22"
Same generation (Fourth generation (GMTK2XX)): years 2015–2019. View model overview