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) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
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 |
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:
Expert Buying Guide for 2020 GMC Sierra 1500 Double Cab
For your 2020 GMC Sierra 1500 Double Cab, the 6x139.7 bolt pattern and 78.1mm center bore are critical. Aftermarket wheels often have a larger center bore; use hub-centric rings to prevent vibration and ensure proper load distribution. Offset must stay within 20-30mm to avoid rubbing or suspension interference. Always use 14x1.5 lug nuts with the correct seat type—factory wheels use a conical (60-degree) seat, while aftermarket may require ball or conical seats. Never mix seat types; improper seating can cause wheel loss. Re-torque after 50-100 miles.
Historical Fitment Data Reference
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
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts to 140 ft-lbs after 50-100 miles of driving.
- ✅ Verify wheel hub bore matches 78.1mm; use hub-centric rings if larger.
- ✅ Check offset carefully: 20-30mm ensures clearance; lower offset may rub suspension.
- ⚠️ 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).
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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.
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