1992 GMC Rally Wagon 1500 Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1992 GMC Rally Wagon 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) | 20-30 |
| Torque Specs | 100 ft-lbs (135 Nm) |
1992 Rally Wagon 1500 — Year-Specific Fitment Context
The 1992 model year marks the beginning of the GMC Rally Wagon 1500's 6x139.7 bolt pattern era, which continued through 1993 (2 consecutive years). Wheels from any 1992–1993 GMC Rally Wagon 1500 are cross-compatible with the 1992 model.
GMC Rally Wagon 1500 Bolt Pattern by Year
The table below shows how the Rally Wagon 1500's wheel specifications have changed over the years. The 1992 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| ▸ 1992 | 6x139.7 | 78.1 | 20-30 |
| 1993 | 6x139.7 | 78.1 | 20-30 |
Fitment Notes
The 1992 GMC Rally Wagon 1500 has a bolt pattern of 6x139.7.
Imperial Conversion: This bolt pattern is commonly referred to as 6x5.5" in imperial units. When searching for aftermarket wheels, you may see them listed as 6x5.5".
This means it is a 6 lug pattern with a circle diameter of 139.7mm. When shopping for aftermarket wheels, ensure the "lug pattern" or "PCD" matches these numbers.
Year-to-Year Fitment Context
In our dataset, GMC Rally Wagon 1500 appears from 1992 to 1993 (2 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: 50.0 mm
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:
1992 GMC Rally Wagon 1500 — Frequently Asked Questions
What is the bolt pattern for a 1992 GMC Rally Wagon 1500?
The 1992 GMC Rally Wagon 1500 uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 78.1mm and the offset is 20-30mm.
What other years of GMC Rally Wagon 1500 have the same bolt pattern as the 1992?
The GMC Rally Wagon 1500 uses the 6x139.7 pattern from 1992 through 1993. Wheels from any of these model years are dimensionally compatible with the 1992, provided the offset and center bore also match.
What is the center bore of a 1992 GMC Rally Wagon 1500?
The factory center bore (hub bore) for the 1992 GMC Rally Wagon 1500 is 78.1mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
Can I use spacers on my 1992 GMC Rally Wagon 1500?
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.
Why is matching the 78.1mm center bore important for the 1992 Rally Wagon 1500?
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.
How tight should I torque the lug nuts on a 1992 GMC Rally Wagon 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.
Fitment Checklist Before You Buy 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).
Editorial Fitment Notes
GMC Rally Wagon 1500 is generally consistent in bolt-pattern records across model years, but offset and hardware should still be validated before purchase.
- Observed production years in our database: 1992-1993 (2 model years).
- Observed bolt-pattern variants: 1 (6x139.7).
- Observed total offset span across years: 50.0 mm.
- Observed center-bore variants: 1 | lug-size variants: 1.
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 1992 GMC Rally Wagon 1500, please report it via our About page contact so we can verify and update this record.