1999 Chevrolet Express 1500 Passenger Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1999 Chevrolet Express 1500 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) | 24-28 |
| Torque Specs | 100 ft-lbs (135 Nm) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
1999 Express 1500 Passenger — Year-Specific Fitment Context
The 1999 Chevrolet Express 1500 Passenger is in year 4 of 19 using the 6x139.7 pattern (1996–2014). Wheels from any 1996–2014 Chevrolet Express 1500 Passenger are cross-compatible with the 1999 model.
Chevrolet Express 1500 Passenger Bolt Pattern by Year
The table below shows how the Express 1500 Passenger's wheel specifications have changed over the years. The 1999 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1996 | 6x139.7 | 78.1 | 24-28 |
| 1997 | 6x139.7 | 78.1 | 24-28 |
| 1998 | 6x139.7 | 78.1 | 24-28 |
| ▸ 1999 | 6x139.7 | 78.1 | 24-28 |
| 2000 | 6x139.7 | 78.1 | 24-28 |
| 2001 | 6x139.7 | 78.1 | 24-28 |
| 2002 | 6x139.7 | 78.1 | 24-28 |
| 2003 | 6x139.7 | 78.1 | 24-28 |
| 2004 | 6x139.7 | 78.1 | 24-28 |
| 2005 | 6x139.7 | 78.1 | 24-28 |
| 2006 | 6x139.7 | 78.1 | 24-28 |
| 2007 | 6x139.7 | 78.1 | 24-28 |
| 2008 | 6x139.7 | 78.1 | 24-28 |
| 2009 | 6x139.7 | 78.1 | 24-28 |
| 2010 | 6x139.7 | 78.1 | 24-28 |
| 2011 | 6x139.7 | 78.1 | 24-28 |
| 2012 | 6x139.7 | 78.1 | 24-28 |
| 2013 | 6x139.7 | 78.1 | 24-28 |
| 2014 | 6x139.7 | 78.1 | 24-28 |
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 1999 Chevrolet Express 1500 Passenger
For your 1999 Chevrolet Express 1500 Passenger, 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 range is 24-28mm; staying within this range maintains correct suspension geometry and prevents tire rubbing. Always verify lug nut thread pitch (14x1.5) and seat type—use conical (60-degree) seat lug nuts for aftermarket wheels. Never mix seat types; incorrect seating can cause wheel loosening. Re-torque lug nuts after 50-100 miles of driving.
Historical Fitment Data Reference
In our dataset, Chevrolet Express 1500 Passenger appears from 1996 to 2014 (19 model years). Across recorded model years, this model generally keeps the same bolt pattern.
- Observed bolt-pattern variants for this model: 1
- Observed center-bore variants for this model: 1
- Observed lug-size variants for this model: 1
- Observed total offset span across years: 52.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts to 140 ft-lbs after 50-100 miles, then periodically check.
- ✅ Avoid wheels with offset below 24mm or above 28mm to prevent rubbing or bearing wear.
- ✅ Use hub-centric rings if aftermarket wheels have a larger center bore than 78.1mm.
- ⚠️ This fitment uses a wide offset range. Check brake clearance and fender clearance before buying wheels.
- ⚠️ Torque lugs in a star pattern to 100 ft-lbs (135 Nm), then re-check torque after 50-100 km (30-60 miles).
Ready to upgrade or perform maintenance?
🛒 Shop Tools & Accessories on AmazonAs an Amazon Associate, I earn from qualifying purchases.
1999 Chevrolet Express 1500 Passenger — Frequently Asked Questions
What is the bolt pattern for a 1999 Chevrolet Express 1500 Passenger?
The 1999 Chevrolet Express 1500 Passenger uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 78.1mm and the offset is 24-28mm.
What other years of Chevrolet Express 1500 Passenger have the same bolt pattern as the 1999?
The Chevrolet Express 1500 Passenger uses the 6x139.7 pattern from 1996 through 2014. 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 Chevrolet Express 1500 Passenger?
The OEM offset for the 1999 Express 1500 Passenger is typically around 24-28mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
Why is matching the 78.1mm center bore important for the 1999 Express 1500 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.
What does 24-28mm offset mean for the 1999 Express 1500 Passenger?
An offset of 24-28mm means the wheel's mounting surface is 24-28mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Chevrolet.
What is the PCD for a 1999 Chevrolet Express 1500 Passenger?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1999 Express 1500 Passenger, the PCD is 6x139.7.
Need more vehicle fitment data?
Access our complete, raw JSON/CSV database of over 11,000+ vehicles for your next app or project.
Get the Full Dataset