1999 GMC Jimmy Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1999 GMC Jimmy, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x120.65 (5x4.75") |
|---|---|
| Lug Nut / Bolt Size | 12x1.5 |
| Center Bore (CB) | 70.3 mm |
| Offset (ET) | 50 |
| Torque Specs | 80 ft-lbs (108 Nm) |
Imperial Match: 5x120.65 is commonly referred to as 5x4.75" in US Standard.
1999 Jimmy — Year-Specific Fitment Context
The 1999 GMC Jimmy is in year 8 of 10 using the 5x120.65 pattern (1992–2001). Wheels from any 1992–2001 GMC Jimmy are cross-compatible with the 1999 model.
GMC Jimmy Bolt Pattern by Year
The table below shows how the Jimmy's wheel specifications have changed over the years. The 1999 model year is highlighted.
5x120.65 Pattern Context
This bolt pattern appears on 202 vehicles in our current database and is considered moderately common.
Examples of other vehicles using 5x120.65:
Expert Buying Guide for 1999 GMC Jimmy
For your 1999 GMC Jimmy, the bolt pattern is 5x120.65mm with a 70.3mm center bore. When selecting aftermarket wheels, ensure the center bore matches or use hub-centric rings to prevent vibration and stress on lug studs. The factory offset is 50mm; staying within ±5mm is recommended to avoid rubbing or clearance issues. Always use lug nuts with the correct thread pitch (12x1.5) and seat type (conical/60-degree) to ensure proper clamping force. Mismatched lug nuts can lead to wheel loosening. Verify that aftermarket wheels are load-rated for your vehicle's weight. Safety first: improper fitment compromises handling and braking.
Historical Fitment Data Reference
In our dataset, GMC Jimmy appears from 1992 to 2001 (10 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: 0.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts after 50-100 miles of driving to maintain proper clamping force.
- ✅ Avoid wheels with a center bore larger than 70.3mm without hub-centric rings; vibrations may occur.
- ✅ Check for brake caliper clearance when using wheels with offset below 45mm or above 55mm.
- ⚠️ Verify thread pitch before installation; M12x1.25 and M12x1.5 are not interchangeable.
- ⚠️ Torque lugs in a star pattern to 80 ft-lbs (108 Nm), then re-check torque after 50-100 km (30-60 miles).
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1999 GMC Jimmy — Frequently Asked Questions
What is the bolt pattern for a 1999 GMC Jimmy?
The 1999 GMC Jimmy uses a 5x120.65 bolt pattern (also called lug pattern or PCD). The center bore is 70.3mm and the offset is 50mm.
What other years of GMC Jimmy have the same bolt pattern as the 1999?
The GMC Jimmy uses the 5x120.65 pattern from 1992 through 2001. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
What is the PCD for a 1999 GMC Jimmy?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1999 Jimmy, the PCD is 5x120.65.
Can I use spacers on my 1999 GMC Jimmy?
Yes, but ensure the wheel spacers match the 5x120.65 bolt pattern and 70.3mm center bore. Also verify that you have enough thread engagement for your 12x1.5 hardware.
Do 1999 GMC Jimmys use lug bolts or lug nuts?
The 1999 Jimmy requires 12x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
Can I put aftermarket wheels on my 1999 GMC Jimmy?
Absolutely. Just ensure the aftermarket wheels have a 5x120.65 bolt pattern, an offset near 50mm, and a center bore of at least 70.3mm (using hub rings if larger).
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