2021 GMC Sierra 3500HD tire and wheel sizes, bolt pattern and tire pressure

Check the tables below for every tire size, wheel size, bolt pattern (PCD), rim offset and tire pressure fitted to the 2021 GMC Sierra 3500HD.

2021 GMC Sierra 3500HD tire sizes

235/80R17 275/70R18 275/65R20

Bolt patterns

8x210

GMT T1XX

8x180

GMT T1XX

Other years

2017 2018 2019 2020 2021 2022 2023 2024 All 1999–2026

Fitment tables

4 trims sold in 2021

Open a trim for its factory package and every alternative size, front and rear.

GMC Sierra 3500HD GMT T1XX

2020 – 2023 USA market 4 trims

Sierra 3500HD 6.6 TD DRW

445 hp · 6.6L V8 235/80 R17 117R 1 fitment

GenerationGMT T1XX 2020–2023

Power445 hp

Engine6.6L V8, Diesel

Center bore154.2 mm

PCD8x210

ThreadM14 x 1.5

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/80 R17 117R	17x6.5 ET125 ~~8x210~~	4.5	Tires Rims

Sierra 3500HD 6.6 TD SRW

445 hp · 6.6L V8 275/70 R18 125S 2 fitments

GenerationGMT T1XX 2020–2023

Power445 hp

Engine6.6L V8, Diesel

Center bore124.1 mm

PCD8x180

ThreadM14 x 1.5

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
275/70 R18 125S	18x8 ET44 ~~8x180~~	–	Tires Rims
275/65 R20 126S	20x8.5 ET47 ~~8x180~~	–	Tires Rims

Sierra 3500HD 6.6i DRW

401 hp · 6.6L L8T V8 235/80 R17 1 fitment

GenerationGMT T1XX 2020–2023

Power401 hp

Engine6.6L L8T V8, Petrol

Center bore154.2 mm

PCD8x210

ThreadM14 x 1.5

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/80 R17	17x6.5 ET125 ~~8x210~~	4.5	Tires Rims

Sierra 3500HD 6.6i SRW

401 hp · 6.6L L8T V8 275/70 R18 125S 2 fitments

GenerationGMT T1XX 2020–2023

Power401 hp

Engine6.6L L8T V8, Petrol

Center bore124.1 mm

PCD8x180

ThreadM14 x 1.5

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
275/70 R18 125S	18x8 ET44 ~~8x180~~	–	Tires Rims
275/65 R20 126S	20x8.5 ET47 ~~8x180~~	–	Tires Rims

Reading the table

What these columns mean

OE fitment: The package fitted at the factory for that trim.
Alternative: A size the car accepts without modification — plus-sizing, winter setups or optional wheels.
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.
Staggered: A wider tire on the rear axle than the front. Front-to-back rotation is not possible.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.