1997 Chevrolet 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 1997 Chevrolet 1500 Extended Cab, 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.
1997 1500 Extended Cab — Year-Specific Fitment Context
The 1997 Chevrolet 1500 Extended Cab is in year 6 of 8 using the 6x139.7 pattern (1992–1999). Wheels from any 1992–1999 Chevrolet 1500 Extended Cab are cross-compatible with the 1997 model.
Chevrolet 1500 Extended Cab Bolt Pattern by Year
The table below shows how the 1500 Extended Cab's wheel specifications have changed over the years. The 1997 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 1997 Chevrolet 1500 Extended Cab
For your 1997 Chevrolet 1500 Extended Cab, the 6x139.7 bolt pattern is shared across 1992–1999 models, ensuring cross-compatibility. The 78.1mm center bore is critical: aftermarket wheels with a larger bore require hub-centric rings to prevent vibration and ensure proper load distribution. Offset must stay within 24-28mm; deviations risk rubbing on suspension or fenders. Always use 14x1.5 lug nuts with the correct seat type—factory wheels use a conical (60-degree) seat; aftermarket wheels may require ball-seat or shank-style nuts. Mismatched seats cause wheel loosening. Re-torque after 50 miles of driving.
Historical Fitment Data Reference
In our dataset, Chevrolet 1500 Extended Cab appears from 1992 to 1999 (8 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 miles of driving to account for settling.
- ✅ Verify wheel bore diameter; if aftermarket bore >78.1mm, install hub-centric rings to avoid vibration.
- ✅ Check offset carefully: 24-28mm is ideal; lower offset may cause tire rub on fenders, higher offset may contact suspension components.
- ⚠️ 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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1997 Chevrolet 1500 Extended Cab — Frequently Asked Questions
What is the bolt pattern for a 1997 Chevrolet 1500 Extended Cab?
The 1997 Chevrolet 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 24-28mm.
What other years of Chevrolet 1500 Extended Cab have the same bolt pattern as the 1997?
The Chevrolet 1500 Extended Cab uses the 6x139.7 pattern from 1992 through 1999. Wheels from any of these model years are dimensionally compatible with the 1997, provided the offset and center bore also match.
What is the center bore of a 1997 Chevrolet 1500 Extended Cab?
The factory center bore (hub bore) for the 1997 Chevrolet 1500 Extended Cab is 78.1mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
Can I put aftermarket wheels on my 1997 Chevrolet 1500 Extended Cab?
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 is the factory wheel offset for a 1997 Chevrolet 1500 Extended Cab?
The OEM offset for the 1997 1500 Extended Cab is typically around 24-28mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
Can I use spacers on my 1997 Chevrolet 1500 Extended Cab?
Yes, but ensure the wheel spacers match the 6x139.7 bolt pattern and 78.1mm center bore. Also verify that you have enough thread engagement for your 14x1.5 hardware.
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