2004 Chevrolet Silverado 1500 Extended Cab Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2004 Chevrolet Silverado 1500 Extended Cab, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 6x139.7 (6x5.5") |
|---|---|
| Lug Nut / Bolt Size | N 14x1.50 |
| Center Bore (CB) | 78.1 mm |
| Offset (ET) | 16 |
| Torque Specs | 100 ft-lbs (135 Nm) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
2004 Silverado 1500 Extended Cab — Year-Specific Fitment Context
The 2004 Chevrolet Silverado 1500 Extended Cab is in year 6 of 15 using the 6x139.7 pattern (1999–2013). Wheels from any 1999–2013 Chevrolet Silverado 1500 Extended Cab are cross-compatible with the 2004 model.
Chevrolet Silverado 1500 Extended Cab Bolt Pattern by Year
The table below shows how the Silverado 1500 Extended Cab's wheel specifications have changed over the years. The 2004 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1999 | 6x139.7 | 78.1 | 16 |
| 2000 | 6x139.7 | 78.1 | 16 |
| 2001 | 6x139.7 | 78.1 | 16 |
| 2002 | 6x139.7 | 78.1 | 16 |
| 2003 | 6x139.7 | 78.1 | 16 |
| ▸ 2004 | 6x139.7 | 78.1 | 16 |
| 2005 | 6x139.7 | 78.1 | 16 |
| 2006 | 6x139.7 | 78.1 | 16 |
| 2007 | 6x139.7 | 78.1 | 16 |
| 2008 | 6x139.7 | 78.1 | 16 |
| 2009 | 6x139.7 | 78.1 | 26 |
| 2010 | 6x139.7 | 78.1 | 26 |
| 2011 | 6x139.7 | 78.1 | 26 |
| 2012 | 6x139.7 | 78.1 | 26 |
| 2013 | 6x139.7 | 78.1 | 26 |
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 2004 Chevrolet Silverado 1500 Extended Cab
For your 2004 Chevrolet Silverado 1500 Extended Cab, the 6x139.7 bolt pattern and 78.1mm center bore are critical. Aftermarket wheels often have a larger center bore (e.g., 78.3mm or 108mm), requiring hub-centric rings to prevent vibration and ensure load is on the hub, not the lug nuts. The stock offset is 16mm; deviations beyond ±10mm may cause rubbing or clearance issues with suspension and brakes. Always use the correct lug nuts: 14x1.50 thread pitch with a conical (60-degree) seat. Never use ball-seat or shank-style nuts, as they can loosen or damage the wheel. Re-torque after 50-100 miles to maintain clamping force.
Historical Fitment Data Reference
In our dataset, Chevrolet Silverado 1500 Extended Cab appears from 1999 to 2013 (15 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: 10.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts to 140 ft-lbs after 50-100 miles of driving.
- ✅ Avoid using steel wheels from older GM trucks (pre-1999) as they may have a different offset and center bore.
- ✅ When installing aftermarket wheels, verify that the wheel's load rating exceeds the vehicle's GVWR (typically 3,200 lbs per wheel).
- ⚠️ Torque lugs in a star pattern to 100 ft-lbs (135 Nm), then re-check torque after 50-100 km (30-60 miles).
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2004 Chevrolet Silverado 1500 Extended Cab — Frequently Asked Questions
What is the bolt pattern for a 2004 Chevrolet Silverado 1500 Extended Cab?
The 2004 Chevrolet Silverado 1500 Extended Cab uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 78.1mm and the offset is 16mm.
What other years of Chevrolet Silverado 1500 Extended Cab have the same bolt pattern as the 2004?
The Chevrolet Silverado 1500 Extended Cab uses the 6x139.7 pattern from 1999 through 2013. Wheels from any of these model years are dimensionally compatible with the 2004, provided the offset and center bore also match.
Why is matching the 78.1mm center bore important for the 2004 Silverado 1500 Extended Cab?
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 is the factory wheel offset for a 2004 Chevrolet Silverado 1500 Extended Cab?
The OEM offset for the 2004 Silverado 1500 Extended Cab is typically around 16mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
How do I measure the bolt pattern on my 2004 Chevrolet?
The 2004 Silverado 1500 Extended Cab uses a 6x139.7 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.
Do 2004 Chevrolet Silverado 1500 Extended Cabs use lug bolts or lug nuts?
The 2004 Silverado 1500 Extended Cab requires N 14x1.50 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
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