1998 Chevrolet G-Series 1500 Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1998 Chevrolet G-Series 1500, 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.
1998 G-Series 1500 — Year-Specific Fitment Context
The 1998 model year is the final year of the Chevrolet G-Series 1500's 6x139.7 bolt pattern run (since 1996). Wheels from any 1996–1998 Chevrolet G-Series 1500 are cross-compatible with the 1998 model.
Chevrolet G-Series 1500 Bolt Pattern by Year
The table below shows how the G-Series 1500's wheel specifications have changed over the years. The 1998 model year is highlighted.
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 1998 Chevrolet G-Series 1500
When selecting wheels for your 1998 Chevrolet G-Series 1500, the 78.1mm center bore is critical. Aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure proper load transfer. The offset must stay within 24-28mm; deviations risk rubbing on suspension or fenders, or causing premature bearing wear. Always use lug nuts with the correct 14x1.5 thread pitch and a conical (60-degree) or ball seat matching your wheel's design. Never mix seat types—this can lead to loosening and wheel loss. Verify that aftermarket wheels are rated for the vehicle's weight capacity, especially for cargo or towing use.
Historical Fitment Data Reference
In our dataset, Chevrolet G-Series 1500 appears from 1996 to 1998 (3 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 after 50-100 miles of driving to account for settling.
- ✅ Avoid using universal 'mag' lug nuts; they may not seat properly with steel wheels.
- ✅ Check for clearance between the wheel spokes and brake calipers, especially with larger aftermarket wheels.
- ⚠️ 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).
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1998 Chevrolet G-Series 1500 — Frequently Asked Questions
What is the bolt pattern for a 1998 Chevrolet G-Series 1500?
The 1998 Chevrolet G-Series 1500 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 G-Series 1500 have the same bolt pattern as the 1998?
The Chevrolet G-Series 1500 uses the 6x139.7 pattern from 1996 through 1998. Wheels from any of these model years are dimensionally compatible with the 1998, provided the offset and center bore also match.
What is the PCD for a 1998 Chevrolet G-Series 1500?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1998 G-Series 1500, the PCD is 6x139.7.
How tight should I torque the lug nuts on a 1998 Chevrolet G-Series 1500?
Refer to your owner's manual for exact specs, but always tighten the 14x1.5 hardware in a star or crisscross pattern. Re-torque after the first 50 miles of driving.
Can I put aftermarket wheels on my 1998 Chevrolet G-Series 1500?
Absolutely. Just ensure the aftermarket wheels have a 6x139.7 bolt pattern, an offset near 24-28mm, and a center bore of at least 78.1mm (using hub rings if larger).
What lug nut size does the 1998 Chevrolet G-Series 1500 use?
The 1998 Chevrolet G-Series 1500 uses 14x1.5 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
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