2015 GMC Sierra 1500 Crew Cab Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2015 GMC Sierra 1500 Crew 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.
2015 Sierra 1500 Crew Cab — Year-Specific Fitment Context
The 2015 GMC Sierra 1500 Crew Cab is in year 12 of 21 using the 6x139.7 pattern (2004–2024). Wheels from any 2004–2024 GMC Sierra 1500 Crew Cab are cross-compatible with the 2015 model.
GMC Sierra 1500 Crew Cab Bolt Pattern by Year
The table below shows how the Sierra 1500 Crew Cab's wheel specifications have changed over the years. The 2015 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 2004 | 6x139.7 | 78.1 | 20-30 |
| 2005 | 6x139.7 | 78.1 | 20-30 |
| 2006 | 6x139.7 | 78.1 | 20-30 |
| 2007 | 6x139.7 | 78.1 | 20-30 |
| 2008 | 6x139.7 | 78.1 | 20-30 |
| 2009 | 6x139.7 | 78.1 | 20-30 |
| 2010 | 6x139.7 | 78.1 | 20-30 |
| 2011 | 6x139.7 | 78.1 | 20-30 |
| 2012 | 6x139.7 | 78.1 | 20-30 |
| 2013 | 6x139.7 | 78.1 | 20-30 |
| 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 2015 GMC Sierra 1500 Crew Cab
For your 2015 GMC Sierra 1500 Crew Cab, the bolt pattern is 6x139.7mm with a critical center bore of 78.1mm. Aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure proper load distribution. The offset range is 20-30mm; staying within this range maintains factory scrub radius and prevents rubbing or suspension interference. Always use the correct lug nuts: 14x1.5 thread pitch with a conical (60-degree) or ball seat matching the wheel's design. Never use incorrect seat types—this can cause wheel loosening. Re-torque after 50-100 miles of driving.
Historical Fitment Data Reference
In our dataset, GMC Sierra 1500 Crew Cab appears from 2004 to 2024 (21 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-lb after 50-100 miles of driving to ensure proper seating.
- ✅ If using aftermarket wheels, verify hub-centric rings are installed to match the 78.1mm center bore.
- ✅ Avoid wheels with offset below 20mm or above 30mm to prevent tire rubbing on suspension or fenders.
- ⚠️ 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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2015 GMC Sierra 1500 Crew Cab — Frequently Asked Questions
What is the bolt pattern for a 2015 GMC Sierra 1500 Crew Cab?
The 2015 GMC Sierra 1500 Crew 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 Crew Cab have the same bolt pattern as the 2015?
The GMC Sierra 1500 Crew Cab uses the 6x139.7 pattern from 2004 through 2024. Wheels from any of these model years are dimensionally compatible with the 2015, provided the offset and center bore also match.
Will wheels from another GMC fit my 2015 Sierra 1500 Crew Cab?
Only if they share the exact same 6x139.7 bolt pattern, a compatible offset, and a center bore equal to or larger than 78.1mm.
What is the PCD for a 2015 GMC Sierra 1500 Crew Cab?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 2015 Sierra 1500 Crew Cab, the PCD is 6x139.7.
What does 20-30mm offset mean for the 2015 Sierra 1500 Crew 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 lug nut size does the 2015 GMC Sierra 1500 Crew Cab use?
The 2015 GMC Sierra 1500 Crew 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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