2013 GMC Sierra 1500 Extended Cab Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2013 GMC Sierra 1500 Extended 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.
2013 Sierra 1500 Extended Cab — Year-Specific Fitment Context
The 2013 model year is the final year of the GMC Sierra 1500 Extended Cab's 6x139.7 bolt pattern run (since 1999). Wheels from any 1999–2013 GMC Sierra 1500 Extended Cab are cross-compatible with the 2013 model.
GMC Sierra 1500 Extended Cab Bolt Pattern by Year
The table below shows how the Sierra 1500 Extended Cab's wheel specifications have changed over the years. The 2013 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1999 | 6x139.7 | 78.1 | 20-30 |
| 2000 | 6x139.7 | 78.1 | 20-30 |
| 2001 | 6x139.7 | 78.1 | 20-30 |
| 2002 | 6x139.7 | 78.1 | 20-30 |
| 2003 | 6x139.7 | 78.1 | 20-30 |
| 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 |
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 2013 GMC Sierra 1500 Extended Cab
For your 2013 GMC Sierra 1500 Extended Cab, the factory center bore is 78.1mm. When installing aftermarket wheels, ensure they have a center bore of at least 78.1mm or use hub-centric rings to prevent vibration and ensure proper load distribution. The recommended offset range is 20-30mm; staying within this range maintains proper suspension geometry and prevents rubbing. Always use the correct lug nuts: 14x1.5 thread pitch with a conical (60-degree) or ball seat, matching the wheel's seat type. Improper lug nuts can cause wheel loosening or damage. Verify that aftermarket wheels are hub-centric or use rings, and torque lug nuts to manufacturer specifications.
Historical Fitment Data Reference
In our dataset, GMC Sierra 1500 Extended Cab appears from 1999 to 2013 (15 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 after 50-100 miles of driving to ensure proper seating.
- ✅ Avoid wheels with offset below 20mm to prevent tire rubbing on suspension components.
- ✅ Check that aftermarket wheels have a center bore larger than 78.1mm; if not, use hub-centric rings to avoid vibration.
- ⚠️ 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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2013 GMC Sierra 1500 Extended Cab — Frequently Asked Questions
What is the bolt pattern for a 2013 GMC Sierra 1500 Extended Cab?
The 2013 GMC Sierra 1500 Extended 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 Extended Cab have the same bolt pattern as the 2013?
The GMC Sierra 1500 Extended Cab uses the 6x139.7 pattern from 1999 through 2013. Wheels from any of these model years are dimensionally compatible with the 2013, provided the offset and center bore also match.
What lug nut size does the 2013 GMC Sierra 1500 Extended Cab use?
The 2013 GMC Sierra 1500 Extended Cab uses 14x1.5 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
Do 2013 GMC Sierra 1500 Extended Cabs use lug bolts or lug nuts?
The 2013 Sierra 1500 Extended Cab requires 14x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
Why is matching the 78.1mm center bore important for the 2013 Sierra 1500 Extended Cab?
The 78.1mm center bore ensures the wheel is perfectly centered on the hub. If the wheel is lug-centric instead of hub-centric, you may experience steering wheel vibration at highway speeds.
How do I measure the bolt pattern on my 2013 GMC?
The 2013 Sierra 1500 Extended 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.
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