2020 GMC Sierra 1500 Double Cab Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2020 GMC Sierra 1500 Double Cab, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 6x139.7 (6x5.5") |
|---|---|
| Lug Nut / Bolt Size | 14x1.5 |
| Center Bore (CB) | 78.1 mm |
| Offset (ET) | 20-30 |
| Torque Specs | 100 ft-lbs (135 Nm) |
2020 Sierra 1500 Double Cab — Year-Specific Fitment Context
The 2020 GMC Sierra 1500 Double Cab is in year 7 of 11 using the 6x139.7 pattern (2014–2024). Wheels from any 2014–2024 GMC Sierra 1500 Double Cab are cross-compatible with the 2020 model.
GMC Sierra 1500 Double Cab Bolt Pattern by Year
The table below shows how the Sierra 1500 Double Cab's wheel specifications have changed over the years. The 2020 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 2014 | 6x139.7 | 78.1 | 20-30 |
| 2015 | 6x139.7 | 78.1 | 20-30 |
| 2016 | 6x139.7 | 78.1 | 20-30 |
| 2017 | 6x139.7 | 78.1 | 20-30 |
| 2018 | 6x139.7 | 78.1 | 20-30 |
| 2019 | 6x139.7 | 78.1 | 20-30 |
| ▸ 2020 | 6x139.7 | 78.1 | 20-30 |
| 2021 | 6x139.7 | 78.1 | 20-30 |
| 2022 | 6x139.7 | 78.1 | 20-30 |
| 2023 | 6x139.7 | 78.1 | 20-30 |
| 2024 | 6x139.7 | 78.1 | 20-30 |
Fitment Notes
The 2020 GMC Sierra 1500 Double Cab has a bolt pattern of 6x139.7.
Imperial Conversion: This bolt pattern is commonly referred to as 6x5.5" in imperial units. When searching for aftermarket wheels, you may see them listed as 6x5.5".
This means it is a 6 lug pattern with a circle diameter of 139.7mm. When shopping for aftermarket wheels, ensure the "lug pattern" or "PCD" matches these numbers.
Year-to-Year Fitment Context
In our dataset, GMC Sierra 1500 Double Cab appears from 2014 to 2024 (11 model years).
Across recorded model years, this model generally keeps the same bolt pattern.
- Observed bolt-pattern variants for this model: 1
- Observed center-bore variants for this model: 1
- Observed lug-size variants for this model: 1
- Observed total offset span across years: 50.0 mm
6x139.7 Pattern Context
This bolt pattern appears on 1067 vehicles in our current database and is considered common.
Examples of other vehicles using 6x139.7:
2020 GMC Sierra 1500 Double Cab — Frequently Asked Questions
What is the bolt pattern for a 2020 GMC Sierra 1500 Double Cab?
The 2020 GMC Sierra 1500 Double Cab uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 78.1mm and the offset is 20-30mm.
What other years of GMC Sierra 1500 Double Cab have the same bolt pattern as the 2020?
The GMC Sierra 1500 Double Cab uses the 6x139.7 pattern from 2014 through 2024. Wheels from any of these model years are dimensionally compatible with the 2020, provided the offset and center bore also match.
What does 20-30mm offset mean for the 2020 Sierra 1500 Double Cab?
An offset of 20-30mm means the wheel's mounting surface is 20-30mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your GMC.
What is the PCD for a 2020 GMC Sierra 1500 Double Cab?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 2020 Sierra 1500 Double Cab, the PCD is 6x139.7.
How do I measure the bolt pattern on my 2020 GMC?
The 2020 Sierra 1500 Double Cab uses a 6x139.7 pattern. For 4, 6, or 8-lug wheels, measure center-to-center across opposite holes. For 5-lug, measure from the center of one hole to the back of the opposite hole.
What lug nut size does the 2020 GMC Sierra 1500 Double Cab use?
The 2020 GMC Sierra 1500 Double Cab uses 14x1.5 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
Fitment Checklist Before You Buy Wheels
- This fitment uses a wide offset range. Check brake clearance and fender clearance before buying wheels.
- Torque lugs in a star pattern to 100 ft-lbs (135 Nm), then re-check torque after 50-100 km (30-60 miles).
Editorial Fitment Notes
GMC Sierra 1500 Double Cab is generally consistent in bolt-pattern records across model years, but offset and hardware should still be validated before purchase.
- Observed production years in our database: 2014-2024 (11 model years).
- Observed bolt-pattern variants: 1 (6x139.7).
- Observed total offset span across years: 50.0 mm.
- Observed center-bore variants: 1 | lug-size variants: 1.
Data Quality & Review
Source note: Compiled from manufacturer fitment references, historical wheel data, and internal normalization rules.
Last reviewed: 2026-05-26 | Reviewed by: Bolt Pattern HQ Editorial Team
If you find a discrepancy for 2020 GMC Sierra 1500 Double Cab, please report it via our About page contact so we can verify and update this record.