2004 GMC Safari Passenger Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2004 GMC Safari 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) | 30 |
| Torque Specs | 100 ft-lbs (135 Nm) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
2004 Safari Passenger — Year-Specific Fitment Context
The 2004 GMC Safari Passenger is in year 2 of 3 using the 6x139.7 pattern (2003–2005). Wheels from any 2003–2005 GMC Safari Passenger are cross-compatible with the 2004 model. Across its full production run (1992–2005), the Safari Passenger has also used: 5x127.
GMC Safari Passenger Bolt Pattern by Year
The table below shows how the Safari Passenger's wheel specifications have changed over the years. The 2004 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 2004 GMC Safari Passenger
For your 2004 GMC Safari Passenger, the 6x139.7 bolt pattern and 78.1mm center bore are critical. Aftermarket wheels often have a larger center bore, requiring hub-centric rings to prevent vibration and ensure proper load transfer. The offset is sensitive: stock is 30mm, but a range of 25-35mm is acceptable; deviations may cause rubbing or clearance issues. Always use 14x1.5 lug nuts with the correct seat type (conical or ball) matching your wheels. Improper lug nuts can lead to wheel loss. Re-torque after 50-100 miles. Avoid wheels from 1992-2002 models (5x127 pattern).
Historical Fitment Data Reference
In our dataset, GMC Safari Passenger appears from 1992 to 2005 (14 model years). Across model years, this model appears with 2 bolt patterns (5x127, 6x139.7).
- Observed bolt-pattern variants for this model: 2
- Observed center-bore variants for this model: 1
- Observed lug-size variants for this model: 2
- Observed total offset span across years: 30.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts to 140 ft-lbs after 50-100 miles of driving.
- ✅ Ensure hub-centric rings are installed if aftermarket wheels have a bore larger than 78.1mm.
- ✅ Verify wheel offset is within 25-35mm to avoid brake caliper or suspension interference.
- ⚠️ Torque lugs in a star pattern to 100 ft-lbs (135 Nm), then re-check torque after 50-100 km (30-60 miles).
- ⚠️ This model has multiple bolt-pattern records across years. Match wheels to exact year/trim before purchase.
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2004 GMC Safari Passenger — Frequently Asked Questions
What is the bolt pattern for a 2004 GMC Safari Passenger?
The 2004 GMC Safari Passenger uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 78.1mm and the offset is 30mm.
What other years of GMC Safari Passenger have the same bolt pattern as the 2004?
The GMC Safari Passenger uses the 6x139.7 pattern from 2003 through 2005. Wheels from any of these model years are dimensionally compatible with the 2004, provided the offset and center bore also match.
What is the center bore of a 2004 GMC Safari Passenger?
The factory center bore (hub bore) for the 2004 GMC Safari Passenger is 78.1mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
Why is matching the 78.1mm center bore important for the 2004 Safari 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.
How tight should I torque the lug nuts on a 2004 GMC Safari Passenger?
Refer to your owner's manual for exact specs, but always tighten the 14x1.5 hardware in a star or crisscross pattern. Re-torque after the first 50 miles of driving.
What is the factory wheel offset for a 2004 GMC Safari Passenger?
The OEM offset for the 2004 Safari Passenger is typically around 30mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
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