1999 GMC Suburban 2500 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 Suburban 2500, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 8x165.1 (8x6.5") |
|---|---|
| Lug Nut / Bolt Size | 14x1.5 |
| Center Bore (CB) | 116.7 mm |
| Offset (ET) | 20-40 |
| Torque Specs | 140 ft-lbs (190 Nm) |
1999 Suburban 2500 — Year-Specific Fitment Context
The 1999 model year is the final year of the GMC Suburban 2500's 8x165.1 bolt pattern run (since 1995). Wheels from any 1995–1999 GMC Suburban 2500 are cross-compatible with the 1999 model. Across its full production run (1992–1999), the Suburban 2500 has also used: 6x139.7.
GMC Suburban 2500 Bolt Pattern by Year
The table below shows how the Suburban 2500's wheel specifications have changed over the years. The 1999 model year is highlighted.
Fitment Notes
The 1999 GMC Suburban 2500 has a bolt pattern of 8x165.1.
Imperial Conversion: This bolt pattern is commonly referred to as 8x6.5" in imperial units. When searching for aftermarket wheels, you may see them listed as 8x6.5".
This means it is a 8 lug pattern with a circle diameter of 165.1mm. When shopping for aftermarket wheels, ensure the "lug pattern" or "PCD" matches these numbers.
Year-to-Year Fitment Context
In our dataset, GMC Suburban 2500 appears from 1992 to 1999 (8 model years).
Across model years, this model appears with 2 bolt patterns (6x139.7, 8x165.1).
- Observed bolt-pattern variants for this model: 2
- Observed center-bore variants for this model: 2
- Observed lug-size variants for this model: 1
- Observed total offset span across years: 60.0 mm
8x165.1 Pattern Context
This bolt pattern appears on 846 vehicles in our current database and is considered common.
Examples of other vehicles using 8x165.1:
1999 GMC Suburban 2500 — Frequently Asked Questions
What is the bolt pattern for a 1999 GMC Suburban 2500?
The 1999 GMC Suburban 2500 uses a 8x165.1 bolt pattern (also called lug pattern or PCD). The center bore is 116.7mm and the offset is 20-40mm.
What other years of GMC Suburban 2500 have the same bolt pattern as the 1999?
The GMC Suburban 2500 uses the 8x165.1 pattern from 1995 through 1999. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
What is the factory wheel offset for a 1999 GMC Suburban 2500?
The OEM offset for the 1999 Suburban 2500 is typically around 20-40mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
Can I put aftermarket wheels on my 1999 GMC Suburban 2500?
Absolutely. Just ensure the aftermarket wheels have a 8x165.1 bolt pattern, an offset near 20-40mm, and a center bore of at least 116.7mm (using hub rings if larger).
What is the center bore of a 1999 GMC Suburban 2500?
The factory center bore (hub bore) for the 1999 GMC Suburban 2500 is 116.7mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
Why is matching the 116.7mm center bore important for the 1999 Suburban 2500?
The 116.7mm 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.
Fitment Checklist Before You Buy Wheels
- This fitment uses a wide offset range. Check brake clearance and fender clearance before buying wheels.
- Torque lugs in a star pattern to 140 ft-lbs (190 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.
Editorial Fitment Notes
GMC Suburban 2500 has multiple wheel-fitment records across generations, so matching exact year and trim is important before ordering wheels.
- Observed production years in our database: 1992-1999 (8 model years).
- Observed bolt-pattern variants: 2 (6x139.7, 8x165.1).
- Observed total offset span across years: 60.0 mm.
- Observed center-bore variants: 2 | lug-size variants: 1.
Data Quality & Review
Source note: Compiled from manufacturer fitment references, historical wheel data, and internal normalization rules.
Last reviewed: 2026-05-26 | Reviewed by: Bolt Pattern HQ Editorial Team
If you find a discrepancy for 1999 GMC Suburban 2500, please report it via our About page contact so we can verify and update this record.