2004 GMC Safari Cargo 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 Cargo, 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 Cargo — Year-Specific Fitment Context
The 2004 GMC Safari Cargo is in year 2 of 3 using the 6x139.7 pattern (2003–2005). Wheels from any 2003–2005 GMC Safari Cargo are cross-compatible with the 2004 model. Across its full production run (1992–2005), the Safari Cargo has also used: 5x127.
GMC Safari Cargo Bolt Pattern by Year
The table below shows how the Safari Cargo'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 Cargo
For your 2004 GMC Safari Cargo, the bolt pattern is 6x139.7mm with a center bore of 78.1mm. When selecting aftermarket wheels, ensure the center bore matches exactly or use hub-centric rings to prevent vibration and ensure proper load distribution. The offset is sensitive; stock is around 30mm. Deviating significantly can cause rubbing or clearance issues. Always use the correct lug nuts: 14x1.5 thread pitch with a cone seat. Using incorrect lug nuts can lead to wheel detachment. Verify that aftermarket wheels are hub-centric and have the correct offset to maintain safety and performance.
Historical Fitment Data Reference
In our dataset, GMC Safari Cargo 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 after 50-100 miles of driving to ensure proper seating.
- ✅ Avoid using universal fit wheels without hub-centric rings; they can cause vibration and stress on wheel studs.
- ✅ Check for clearance with brake calipers and suspension components when changing offset, as the 2004 Safari Cargo has tight tolerances.
- ⚠️ 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 Cargo — Frequently Asked Questions
What is the bolt pattern for a 2004 GMC Safari Cargo?
The 2004 GMC Safari Cargo 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 Cargo have the same bolt pattern as the 2004?
The GMC Safari Cargo 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 lug nut size does the 2004 GMC Safari Cargo use?
The 2004 GMC Safari Cargo uses 14x1.5 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
Can I use spacers on my 2004 GMC Safari Cargo?
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.
What is the factory wheel offset for a 2004 GMC Safari Cargo?
The OEM offset for the 2004 Safari Cargo is typically around 30mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
What does 30mm offset mean for the 2004 Safari Cargo?
An offset of 30mm means the wheel's mounting surface is 30mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your GMC.
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