1999 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 1999 GMC Safari Cargo, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x127 (5x5") |
|---|---|
| Lug Nut / Bolt Size | 1/2 20 |
| Center Bore (CB) | 78.1 mm |
| Offset (ET) | 0 |
| Torque Specs | 100 ft-lbs (135 Nm) |
Imperial Match: 5x127 is commonly referred to as 5x5" in US Standard.
1999 Safari Cargo — Year-Specific Fitment Context
The 1999 GMC Safari Cargo is in year 8 of 11 using the 5x127 pattern (1992–2002). Wheels from any 1992–2002 GMC Safari Cargo are cross-compatible with the 1999 model. Across its full production run (1992–2005), the Safari Cargo has also used: 6x139.7.
GMC Safari Cargo Bolt Pattern by Year
The table below shows how the Safari Cargo's wheel specifications have changed over the years. The 1999 model year is highlighted.
5x127 Pattern Context
This bolt pattern appears on 236 vehicles in our current database and is considered moderately common.
Examples of other vehicles using 5x127:
Expert Buying Guide for 1999 GMC Safari Cargo
For your 1999 GMC Safari Cargo, the 5x127 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 distribution. The factory offset is 0mm; deviations beyond ±5mm may cause rubbing or clearance issues. Always use lug nuts with the correct 1/2-20 thread pitch and a 60-degree conical seat—never ball seat or acorn types. Re-torque after 50-100 miles. Wheels from 1992-2002 Safari Cargo are direct fit. Avoid 6x139.7 wheels from other years.
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 to 100 ft-lbs after 50-100 miles of driving.
- ✅ If using aftermarket wheels, verify hub bore is ≥78.1mm and use hub-centric rings to center the wheel.
- ✅ Check for clearance between the wheel and brake calipers or suspension components, especially with offset changes.
- ⚠️ 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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1999 GMC Safari Cargo — Frequently Asked Questions
What is the bolt pattern for a 1999 GMC Safari Cargo?
The 1999 GMC Safari Cargo uses a 5x127 bolt pattern (also called lug pattern or PCD). The center bore is 78.1mm and the offset is 0mm.
What other years of GMC Safari Cargo have the same bolt pattern as the 1999?
The GMC Safari Cargo uses the 5x127 pattern from 1992 through 2002. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
What lug nut size does the 1999 GMC Safari Cargo use?
The 1999 GMC Safari Cargo uses 1/2 20 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
What is the PCD for a 1999 GMC Safari Cargo?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1999 Safari Cargo, the PCD is 5x127.
How do I measure the bolt pattern on my 1999 GMC?
The 1999 Safari Cargo uses a 5x127 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.
What is the factory wheel offset for a 1999 GMC Safari Cargo?
The OEM offset for the 1999 Safari Cargo is typically around 0mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
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