2018 GMC Yukon XL Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2018 GMC Yukon XL, 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.
2018 Yukon XL — Year-Specific Fitment Context
The 2018 GMC Yukon XL is in year 4 of 10 using the 6x139.7 pattern (2015–2024). Wheels from any 2015–2024 GMC Yukon XL are cross-compatible with the 2018 model.
GMC Yukon XL Bolt Pattern by Year
The table below shows how the Yukon XL's wheel specifications have changed over the years. The 2018 model year is highlighted.
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 2018 GMC Yukon XL
The 2018 GMC Yukon XL uses a 6x139.7 bolt pattern with a 78.1mm center bore. When selecting aftermarket wheels, ensure the center bore matches or use hub-centric rings to prevent vibration and ensure proper load distribution. The recommended offset range is 20-30mm; deviating may cause rubbing or clearance issues with suspension and brakes. Always use lug nuts with the correct thread pitch (14x1.5) and seat type (conical/60-degree) to avoid wheel loosening. Failure to match these specifications compromises safety and handling.
Historical Fitment Data Reference
In our dataset, GMC Yukon XL appears from 2015 to 2024 (10 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 to maintain proper clamping force.
- ✅ Avoid using wheels with a center bore larger than 78.1mm without hub-centric rings; vibrations may occur.
- ✅ Check brake caliper clearance when using wheels with offset near 20mm, as some aftermarket designs may interfere.
- ⚠️ 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).
Ready to upgrade or perform maintenance?
🛒 Shop Tools & Accessories on AmazonAs an Amazon Associate, I earn from qualifying purchases.
2018 GMC Yukon XL — Frequently Asked Questions
What is the bolt pattern for a 2018 GMC Yukon XL?
The 2018 GMC Yukon XL 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 Yukon XL have the same bolt pattern as the 2018?
The GMC Yukon XL uses the 6x139.7 pattern from 2015 through 2024. Wheels from any of these model years are dimensionally compatible with the 2018, provided the offset and center bore also match.
Can I use spacers on my 2018 GMC Yukon XL?
Yes, but ensure the wheel spacers match the 6x139.7 bolt pattern and 78.1mm center bore. Also verify that you have enough thread engagement for your 14x1.5 hardware.
How do I measure the bolt pattern on my 2018 GMC?
The 2018 Yukon XL 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.
Will wheels from another GMC fit my 2018 Yukon XL?
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 center bore of a 2018 GMC Yukon XL?
The factory center bore (hub bore) for the 2018 GMC Yukon XL is 78.1mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
Need more vehicle fitment data?
Access our complete, raw JSON/CSV database of over 11,000+ vehicles for your next app or project.
Get the Full Dataset