1999 GMC Savana 3500 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 Savana 3500 Cargo, 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) | 28 |
| Torque Specs | 140 ft-lbs (190 Nm) |
Imperial Match: 8x165.1 is commonly referred to as 8x6.5" in US Standard.
1999 Savana 3500 Cargo — Year-Specific Fitment Context
The 1999 GMC Savana 3500 Cargo is in year 4 of 15 using the 8x165.1 pattern (1996–2010). Wheels from any 1996–2010 GMC Savana 3500 Cargo are cross-compatible with the 1999 model. Across its full production run (1996–2024), the Savana 3500 Cargo has also used: 8x180.
GMC Savana 3500 Cargo Bolt Pattern by Year
The table below shows how the Savana 3500 Cargo's wheel specifications have changed over the years. The 1999 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1996 | 8x165.1 | 116.7 | 28 |
| 1997 | 8x165.1 | 116.7 | 28 |
| 1998 | 8x165.1 | 116.7 | 28 |
| ▸ 1999 | 8x165.1 | 116.7 | 28 |
| 2000 | 8x165.1 | 116.7 | 28 |
| 2001 | 8x165.1 | 116.7 | 28 |
| 2002 | 8x165.1 | 116.7 | 28 |
| 2003 | 8x165.1 | 116.7 | 28 |
| 2004 | 8x165.1 | 116.7 | 28 |
| 2005 | 8x165.1 | 116.7 | 28 |
| 2006 | 8x165.1 | 116.7 | 28 |
| 2007 | 8x165.1 | 116.7 | 28 |
| 2008 | 8x165.1 | 116.7 | 28 |
| 2009 | 8x165.1 | 116.7 | 28 |
| 2010 | 8x165.1 | 116.7 | 28 |
| 2011 | 8x180 | 124.9 | 44 |
| 2012 | 8x180 | 124.9 | 44 |
| 2013 | 8x180 | 124.9 | 44 |
| 2014 | 8x180 | 124.9 | 44 |
| 2015 | 8x180 | 124.9 | 44 |
| 2016 | 8x180 | 124.9 | 44 |
| 2017 | 8x180 | 124.9 | 44 |
| 2018 | 8x180 | 124.9 | 44 |
| 2019 | 8x180 | 124.9 | 44 |
| 2021 | 8x180 | 124.9 | 44 |
| 2022 | 8x180 | 124.9 | 44 |
| 2023 | 8x180 | 124.9 | 44 |
| 2024 | 8x180 | 124.9 | 44 |
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:
Expert Buying Guide for 1999 GMC Savana 3500 Cargo
For your 1999 GMC Savana 3500 Cargo, the bolt pattern is 8x165.1mm with a critical center bore of 116.7mm. Aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure proper load transfer. The factory offset is 28mm; deviations beyond ±5mm may cause rubbing or clearance issues. Always use the correct lug nuts: 14x1.5 thread pitch with a conical (60-degree) seat. Never use ball-seat lug nuts, as they can loosen. Re-torque after 50-100 miles. Wheels from 1996-2010 Savana 3500 are compatible, but avoid 8x180mm pattern from later models.
Historical Fitment Data Reference
In our dataset, GMC Savana 3500 Cargo appears from 1996 to 2024 (28 model years). Across model years, this model appears with 2 bolt patterns (8x165.1, 8x180).
- 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: 16.0 mm
Quick Tips & Safety Warnings
- ✅ Always use hub-centric rings if aftermarket wheels have a bore larger than 116.7mm to prevent vibrations.
- ✅ Re-torque lug nuts to 140 ft-lb after 50-100 miles of driving.
- ✅ Verify wheel offset is within 23-33mm to avoid rubbing on suspension or body components.
- ⚠️ 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.
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1999 GMC Savana 3500 Cargo — Frequently Asked Questions
What is the bolt pattern for a 1999 GMC Savana 3500 Cargo?
The 1999 GMC Savana 3500 Cargo uses a 8x165.1 bolt pattern (also called lug pattern or PCD). The center bore is 116.7mm and the offset is 28mm.
What other years of GMC Savana 3500 Cargo have the same bolt pattern as the 1999?
The GMC Savana 3500 Cargo uses the 8x165.1 pattern from 1996 through 2010. 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 Savana 3500 Cargo use?
The 1999 GMC Savana 3500 Cargo uses 14x1.5 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
Why is matching the 116.7mm center bore important for the 1999 Savana 3500 Cargo?
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.
Can I use spacers on my 1999 GMC Savana 3500 Cargo?
Yes, but ensure the wheel spacers match the 8x165.1 bolt pattern and 116.7mm center bore. Also verify that you have enough thread engagement for your 14x1.5 hardware.
What does 28mm offset mean for the 1999 Savana 3500 Cargo?
An offset of 28mm means the wheel's mounting surface is 28mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your GMC.
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