2008 GMC Savana 1500 Passenger Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2008 GMC Savana 1500 Passenger, 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.
2008 Savana 1500 Passenger — Year-Specific Fitment Context
The 2008 GMC Savana 1500 Passenger is in year 13 of 19 using the 6x139.7 pattern (1996–2014). Wheels from any 1996–2014 GMC Savana 1500 Passenger are cross-compatible with the 2008 model.
GMC Savana 1500 Passenger Bolt Pattern by Year
The table below shows how the Savana 1500 Passenger's wheel specifications have changed over the years. The 2008 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1996 | 6x139.7 | 78.1 | 20-30 |
| 1997 | 6x139.7 | 78.1 | 20-30 |
| 1998 | 6x139.7 | 78.1 | 20-30 |
| 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 |
| 2014 | 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 2008 GMC Savana 1500 Passenger
For the 2008 GMC Savana 1500 Passenger, the 6x139.7 bolt pattern and 78.1mm center bore are critical. Aftermarket wheels must be hub-centric; use hub-centric rings if the bore is larger. Offset must stay within 20-30mm to avoid rubbing or suspension interference. Always use 14x1.5 lug nuts with the correct seat (cone or ball) matching the wheel. Improper lug nut seating can cause wheel separation. Re-torque after 50-100 miles.
Historical Fitment Data Reference
In our dataset, GMC Savana 1500 Passenger appears from 1996 to 2014 (19 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.
- ✅ Ensure aftermarket wheels have a center bore of at least 78.1mm; use hub-centric rings if larger.
- ✅ Verify lug nut seat type (cone vs. ball) matches the wheel; mismatched seats can cause loosening.
- ⚠️ 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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2008 GMC Savana 1500 Passenger — Frequently Asked Questions
What is the bolt pattern for a 2008 GMC Savana 1500 Passenger?
The 2008 GMC Savana 1500 Passenger 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 Savana 1500 Passenger have the same bolt pattern as the 2008?
The GMC Savana 1500 Passenger uses the 6x139.7 pattern from 1996 through 2014. Wheels from any of these model years are dimensionally compatible with the 2008, provided the offset and center bore also match.
How do I measure the bolt pattern on my 2008 GMC?
The 2008 Savana 1500 Passenger 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.
Can I put aftermarket wheels on my 2008 GMC Savana 1500 Passenger?
Absolutely. Just ensure the aftermarket wheels have a 6x139.7 bolt pattern, an offset near 20-30mm, and a center bore of at least 78.1mm (using hub rings if larger).
Why is matching the 78.1mm center bore important for the 2008 Savana 1500 Passenger?
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.
What does 20-30mm offset mean for the 2008 Savana 1500 Passenger?
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.
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