2020 GMC Sierra 1500 tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 6x139.7 on every 2020 trim.

Tires for the 2020 GMC Sierra 1500

Sizes most trims come with first. Open your trim below for its exact size.

255/70R17 Best-rated standard on 5 trims

Check price on Amazon · 255/70R17
265/70R17 Best-rated optional on 5 trims

Check price on Amazon · 265/70R17
265/65R18 Best-rated optional on 5 trims

Check price on Amazon · 265/65R18

Also listed: 275/65R18 275/60R20 275/50R22

TireWheelGuide may earn a commission from purchases made through these links.

Trims sold in 2020: 5
Generation: GMTT1
Other years: 2016
2017
2018
2019
2020
2021
2022
2023
All years (1988–2026)

5 trims sold in 2020

Open a trim for its tire and rim sizes, bolt pattern and tire pressure. Trims with the same tires and wheels share a row.

GMC Sierra 1500 GMTT1

2019–2022 5 trims

Sierra 1500 2.7 Turbo +4 variants 310 hp · 2.7L I4 255/70R17 112S 7 fitments

Same tires and wheels on: 3.0 TD, 4.3i, 5.3i, 6.2i

Generation: GMTT1 · 2019–2022
Power: 310 hp
Engine: 2.7L I4, Petrol
Center bore: 78.1 mm
Bolt pattern: 6x139.7
Thread: M14 x 1.5

Check price on Amazon · 255/70R17 Wheels 17x8 ET24 · 6x139.7 · 78.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
255/70R17 112S	Rim 17x8 ET24 6x139.7	–
265/70R17 115S	Rim 17x8 ET24 6x139.7	–
265/70R17 112Q	Rim 17x8 ET24 6x139.7	–
265/65R18 114T	Rim 18x8.5 ET26 6x139.7	–
275/65R18 113Q	Rim 18x8.5 ET26 6x139.7	–
275/60R20 115S	Rim 20x9 ET28 6x139.7	–
275/50R22	Rim 22x9 ET28 6x139.7	–

How to read 112S: 112 is the load index (up to 2,469 lb / 1,120 kg per tire) and S the speed rating (up to 112 mph / 180 km/h). ET24 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres. Compare offsets in the wheel offset calculator.

What these columns mean

Rim size: Rim diameter × width in inches, and the factory offset (ET) in millimetres, e.g. 18x7.5 ET25.
Bolt pattern (PCD): Number of studs and the diameter of the circle they sit on. It must match exactly.
Center bore: Diameter of the hub hole. Larger aftermarket bores need hub-centric rings.
Pressure: Recommended cold inflation pressure for that axle, in psi.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.