1993 GMC 3500 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 1993 GMC 3500 Regular Cab, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 8x165.1 (8x6.5") |
|---|---|
| Lug Nut / Bolt Size | 14x1.5 |
| Center Bore (CB) | 116.7 mm |
| Offset (ET) | 20 |
| Torque Specs | 140 ft-lbs (190 Nm) |
Imperial Match: 8x165.1 is commonly referred to as 8x6.5" in US Standard.
1993 3500 Regular Cab — Year-Specific Fitment Context
The 1993 GMC 3500 Regular Cab is in year 2 of 8 using the 8x165.1 pattern (1992–1999). Wheels from any 1992–1999 GMC 3500 Regular Cab are cross-compatible with the 1993 model.
GMC 3500 Regular Cab Bolt Pattern by Year
The table below shows how the 3500 Regular Cab's wheel specifications have changed over the years. The 1993 model year is highlighted.
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:
Expert Buying Guide for 1993 GMC 3500 Regular Cab
For your 1993 GMC 3500 Regular Cab, the 8x165.1 bolt pattern is shared with 1992–1999 models. The critical center bore is 116.7mm; aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure load is on the hub, not the lugs. Offset is sensitive—stick to the factory 20mm range; deviations may cause rubbing or bearing stress. Always use lug nuts with the correct 14x1.5 thread pitch and proper seat (cone or ball) matching the wheel. Never mix seat types; improper seating can lead to wheel loss. Verify wheel load rating exceeds your truck's GVWR.
Historical Fitment Data Reference
In our dataset, GMC 3500 Regular 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: 60.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts after 50–100 miles of driving to maintain clamping force.
- ✅ Avoid wheels with a center bore smaller than 116.7mm; they won't fit over the hub.
- ✅ Check that aftermarket wheels clear the brake calipers and suspension components before mounting.
- ⚠️ Torque lugs in a star pattern to 140 ft-lbs (190 Nm), then re-check torque after 50-100 km (30-60 miles).
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1993 GMC 3500 Regular Cab — Frequently Asked Questions
What is the bolt pattern for a 1993 GMC 3500 Regular Cab?
The 1993 GMC 3500 Regular Cab uses a 8x165.1 bolt pattern (also called lug pattern or PCD). The center bore is 116.7mm and the offset is 20mm.
What other years of GMC 3500 Regular Cab have the same bolt pattern as the 1993?
The GMC 3500 Regular Cab uses the 8x165.1 pattern from 1992 through 1999. Wheels from any of these model years are dimensionally compatible with the 1993, provided the offset and center bore also match.
How do I measure the bolt pattern on my 1993 GMC?
The 1993 3500 Regular Cab uses a 8x165.1 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.
What does 20mm offset mean for the 1993 3500 Regular Cab?
An offset of 20mm means the wheel's mounting surface is 20mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your GMC.
What is the center bore of a 1993 GMC 3500 Regular Cab?
The factory center bore (hub bore) for the 1993 GMC 3500 Regular Cab is 116.7mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
Do 1993 GMC 3500 Regular Cabs use lug bolts or lug nuts?
The 1993 3500 Regular Cab requires 14x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
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