1999 Chevrolet Silverado 2500 HD Regular Cab 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 Silverado 2500 HD Regular Cab, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 8x165.1 (8x6.5") |
|---|---|
| Lug Nut / Bolt Size | N 14x1.50 |
| Center Bore (CB) | 116.6 mm |
| Offset (ET) | 26 |
| Torque Specs | 140 ft-lbs (190 Nm) |
1999 Silverado 2500 HD Regular Cab — Year-Specific Fitment Context
The 1999 model year marks the beginning of the Chevrolet Silverado 2500 HD Regular Cab's 8x165.1 bolt pattern era, which continued through 2011 (13 consecutive years). Wheels from any 1999–2011 Chevrolet Silverado 2500 HD Regular Cab are cross-compatible with the 1999 model. Across its full production run (1999–2024), the Silverado 2500 HD Regular Cab has also used: 8x180.
Chevrolet Silverado 2500 HD Regular Cab Bolt Pattern by Year
The table below shows how the Silverado 2500 HD Regular Cab's wheel specifications have changed over the years. The 1999 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| ▸ 1999 | 8x165.1 | 116.6 | 26 |
| 2000 | 8x165.1 | 116.6 | 26 |
| 2001 | 8x165.1 | 116.6 | 26 |
| 2002 | 8x165.1 | 116.6 | 26 |
| 2003 | 8x165.1 | 116.6 | 26 |
| 2004 | 8x165.1 | 116.6 | 26 |
| 2005 | 8x165.1 | 116.6 | 26 |
| 2006 | 8x165.1 | 116.6 | 26 |
| 2007 | 8x165.1 | 116.6 | 26 |
| 2008 | 8x165.1 | 116.6 | 26 |
| 2009 | 8x165.1 | 116.6 | 26 |
| 2010 | 8x165.1 | 116.6 | 26 |
| 2011 | 8x165.1 | 116.6 | 26 |
| 2012 | 8x180 | 124.1 | 42 |
| 2013 | 8x180 | 124.1 | 42 |
| 2014 | 8x180 | 124.1 | 42 |
| 2015 | 8x180 | 124.1 | 42 |
| 2016 | 8x180 | 124.1 | 42 |
| 2017 | 8x180 | 124.1 | 42 |
| 2018 | 8x180 | 124.1 | 42 |
| 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 |
Fitment Notes
The 1999 Chevrolet Silverado 2500 HD Regular Cab 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, Chevrolet Silverado 2500 HD Regular Cab appears from 1999 to 2024 (25 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: 3
- Observed lug-size variants for this model: 2
- Observed total offset span across years: 18.0 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 Chevrolet Silverado 2500 HD Regular Cab — Frequently Asked Questions
What is the bolt pattern for a 1999 Chevrolet Silverado 2500 HD Regular Cab?
The 1999 Chevrolet Silverado 2500 HD Regular Cab uses a 8x165.1 bolt pattern (also called lug pattern or PCD). The center bore is 116.6mm and the offset is 26mm.
What other years of Chevrolet Silverado 2500 HD Regular Cab have the same bolt pattern as the 1999?
The Chevrolet Silverado 2500 HD Regular Cab uses the 8x165.1 pattern from 1999 through 2011. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
What is the PCD for a 1999 Chevrolet Silverado 2500 HD Regular Cab?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1999 Silverado 2500 HD Regular Cab, the PCD is 8x165.1.
Why is matching the 116.6mm center bore important for the 1999 Silverado 2500 HD Regular Cab?
The 116.6mm 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 put aftermarket wheels on my 1999 Chevrolet Silverado 2500 HD Regular Cab?
Absolutely. Just ensure the aftermarket wheels have a 8x165.1 bolt pattern, an offset near 26mm, and a center bore of at least 116.6mm (using hub rings if larger).
What lug nut size does the 1999 Chevrolet Silverado 2500 HD Regular Cab use?
The 1999 Chevrolet Silverado 2500 HD Regular Cab uses N 14x1.50 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
Fitment Checklist Before You Buy 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
Chevrolet Silverado 2500 HD Regular Cab has multiple wheel-fitment records across generations, so matching exact year and trim is important before ordering wheels.
- Observed production years in our database: 1999-2024 (25 model years).
- Observed bolt-pattern variants: 2 (8x165.1, 8x180).
- Observed total offset span across years: 18.0 mm.
- Observed center-bore variants: 3 | lug-size variants: 2.
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 Chevrolet Silverado 2500 HD Regular Cab, please report it via our About page contact so we can verify and update this record.