2007 GMC Sierra (Classic) 1500 HD Crew Cab Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2007 GMC Sierra (Classic) 1500 HD Crew 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) | 20-30 |
| Torque Specs | 100 ft-lbs (135 Nm) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
2007 Sierra (Classic) 1500 HD Crew Cab — Year-Specific Fitment Context
The 2007 is the only model year of the GMC Sierra (Classic) 1500 HD Crew Cab in our database using the 6x139.7 bolt pattern.
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 2007 GMC Sierra (Classic) 1500 HD Crew Cab
For your 2007 GMC Sierra (Classic) 1500 HD Crew Cab, the 6x139.7 bolt pattern is specific to this model year. The 78.1mm center bore requires hub-centric rings for aftermarket wheels to prevent vibration and ensure proper load distribution. Offset must stay within 20-30mm; deviations risk rubbing or poor handling. Always use 14x1.5 lug nuts with correct seat type (cone or ball) matching your wheels. Improper thread pitch or seating can cause wheel loss. Verify wheel specs against these critical dimensions for safe fitment.
Historical Fitment Data Reference
In our dataset, GMC Sierra (Classic) 1500 HD Crew Cab appears from 2007 to 2007 (1 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
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts after 50-100 miles of driving to maintain clamping force.
- ✅ Avoid wheels with center bore larger than 78.1mm without hub rings; vibrations may occur.
- ✅ Check for caliper clearance with aftermarket wheels, especially if offset is near 20mm.
- ⚠️ 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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2007 GMC Sierra (Classic) 1500 HD Crew Cab — Frequently Asked Questions
What is the bolt pattern for a 2007 GMC Sierra (Classic) 1500 HD Crew Cab?
The 2007 GMC Sierra (Classic) 1500 HD Crew Cab uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 78.1mm and the offset is 20-30mm.
How do I measure the bolt pattern on my 2007 GMC?
The 2007 Sierra (Classic) 1500 HD Crew Cab uses a 6x139.7 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 lug nut size does the 2007 GMC Sierra (Classic) 1500 HD Crew Cab use?
The 2007 GMC Sierra (Classic) 1500 HD Crew Cab uses 14x1.5 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
Why is matching the 78.1mm center bore important for the 2007 Sierra (Classic) 1500 HD Crew Cab?
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.
What is the PCD for a 2007 GMC Sierra (Classic) 1500 HD Crew Cab?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 2007 Sierra (Classic) 1500 HD Crew Cab, the PCD is 6x139.7.
Do 2007 GMC Sierra (Classic) 1500 HD Crew Cabs use lug bolts or lug nuts?
The 2007 Sierra (Classic) 1500 HD Crew Cab requires 14x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
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