Recorded OEM specifications for the 2008 GMC Sierra 2500HD, donor years with overlapping ranges, and a calculator to compare a selected wheel. Range overlap is not a guaranteed fit.
Baseline mounting dimensions used for interchange decisions.
Multiple OEM configurations exist for this vehicle. Fitment can vary by trim, brakes, and factory wheel package – confirm your exact setup before buying.
Center-bore records disagree: year-level hub 124.1 mm vs trim range 116.7–116.7 mm. Interchange below does not treat this as an unqualified match.
Thread-only product links are shopping examples, not verified fits. Seat style is not confirmed here. As an Amazon Associate we earn from qualifying purchases.
These are vehicle-year records whose recorded OEM ranges overlap this 2008 GMC Sierra 2500HD. Overlap is not a guarantee that a specific wheel will install. Selected-wheel comparison is in the calculator below.
Evaluated 24 donor years. Listed 17 eligible overlaps (not all evaluated years are compatible). Showing all listed.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Dataset suggestionWheel spacer ≈ 13 mm – not a verified installation requirement.
Hub-centric rings of about 124.1 → 116.7 mm mm may be relevant if the wheel bore is larger than the hub. A spacer of about 13 mm is a dataset suggestion only; clearance is not verified.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Center-bore records disagree (target year-level hub 124.1 mm vs trim range 116.7–116.7 mm; donor year-level hub 124.1 mm vs trim range 116.7–116.7 mm). Unqualified overlap is not claimed until the conflict is resolved.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Dataset suggestionHub-centric rings ≈ 130.8 → 116.7 mm – not a verified installation requirement.
Wheel width/offset data is incomplete. Hub ring 130.8 → 116.7 mm may apply if mounting dimensions are otherwise compatible.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Dataset suggestionHub-centric rings ≈ 154.2 → 116.7 mm – not a verified installation requirement.
Hub-centric rings of about 154.2 → 116.7 mm mm may be relevant if the wheel bore is larger than the hub; clearance is not verified. Donor width/offset sits outside the known OEM envelope for this vehicle.
Only years with evidence-based interchange relationships are listed. Adjacent years are not assumed compatible.
Compare a donor vehicle or custom wheel against this 2008 GMC Sierra 2500HD. Use Compare in calculator on a donor row above to fill the donor side of this same calculator.
Compare wheel compatibility between two vehicles
2008 GMC Sierra 2500HD
Example products matched to recorded thread, hub, or spacer dimensions. They are not verified fits. Confirm seat style, thickness, and clearance before ordering.
M14 x 1.5
M14 x 1.5 · Thread match only; seat style is not verified
View on Amazon →
M14 x 1.5 · Thread match only; seat style is not verified
View on Amazon →
M14 x 1.5 · Thread match only; seat style is not verified
View on Amazon →As an Amazon Associate we earn from qualifying purchases. Product availability and pricing may change.
The following specifications are the known fitment values provided for this page. Equipment can vary by trim, package, axle configuration, or market, so confirm the original wheel markings and the vehicle documentation before ordering.
| Specification | Known value |
|---|---|
| Bolt pattern | 8x180 |
| Center bore | 116.7 mm |
| Thread size | M14 x 1.5 |
| Rim diameter | 20 inches |
| Rim width | 9.0 inches |
| Wheel offset | ET20, or 20 mm |
| Backspacing | 5.29 inches |
| Known tire size | 265/60R20 |
| Tire section width | 265 mm |
| Tire aspect ratio | 60 percent |
These values describe the supplied known OEM fitment data, not every possible wheel or tire option for every 2008 GMC Sierra 2500HD. Verify the tire placard, owner documentation, and the markings on your current wheels. The replacement wheel must match the 8x180 bolt pattern, clear the M14 x 1.5 hardware, and provide suitable load capacity and brake clearance.
Use the calculator to compare a donor vehicle's wheels with the wheels installed on your 2008 GMC Sierra 2500HD. Enter the donor wheel diameter, width, and offset, then enter the donor tire section width and aspect ratio when applicable.
In the installed-vehicle fields, enter the known or measured specifications for your Sierra. You can also use the custom wheel size controls to test a different rim diameter, rim width, or offset. The custom tire fields allow you to compare a different section width or aspect ratio.
Changing rim diameter updates the tire diameter shown in the comparison. Review the calculator as a dimensional comparison tool only. It does not replace confirmation of bolt pattern, center bore, brake clearance, load rating, tire clearance, speedometer effects, or local legal requirements.
Do not rely on diameter alone. A wheel with the correct diameter may still be unsafe or incompatible if its bolt pattern, center bore, offset, load rating, or brake clearance is wrong.
Plus sizing changes the relationship between wheel diameter, tire sidewall height, overall tire diameter, and available clearance. A larger rim does not automatically provide better fitment, and a wider tire can contact suspension or body components even when the wheel diameter is unchanged.
Use the calculator to test custom rim diameter, rim width, offset, section width, and aspect ratio. Compare the resulting tire diameter with the known 265/60R20 reference and inspect the displayed dimensional changes. The calculator cannot determine every vehicle-specific interference point, so physical clearance checks remain necessary.
Do not assume that a wheel from another vehicle is compatible because it has eight lug holes or a similar advertised size. Confirm bolt pattern, center bore, offset, brake clearance, load rating, lug-seat design, and tire requirements from the wheel manufacturer and OEM sources.
Use clean, undamaged mounting surfaces. Remove rust, dirt, and debris from the hub face and wheel mounting pad without removing material that affects fitment. Never stack spacers or use adapters unless they are specifically engineered for the application and installed according to their instructions.
Install the correct M14 x 1.5 lug hardware with the correct seat type for the wheel. Hand-start every lug nut to prevent cross-threading. Tighten the lugs in a star pattern, then torque them to the vehicle or wheel manufacturer's specified value using a calibrated torque wrench. The exact torque value is not provided here and should be confirmed in the OEM service information.
With the vehicle safely supported, rotate each wheel by hand and inspect for contact. Turn the steering from lock to lock where applicable, then perform a slow test drive in a safe area. Recheck lug torque after the interval specified by the vehicle or wheel manufacturer, especially after initial installation.
A calibrated torque wrench, suitable socket, jack and properly rated jack stands, wheel chocks, a tire-pressure gauge, and a tread or clearance inspection tool are useful for a careful installation. Use the vehicle's approved lifting points and never work under a vehicle supported only by a jack.
For a suitable torque-wrench search, see automotive torque wrenches on Amazon. For checking tire pressure after installation, see digital tire pressure gauges on Amazon.
What is the bolt pattern for the 2008 GMC Sierra 2500HD?
The known bolt pattern supplied for this page is 8x180. Confirm the wheel manufacturer's listing and physically verify the wheel before purchase.
What is the center bore?
The known center bore is 116.7 mm. A replacement wheel with a smaller center bore will not fit over the hub. A larger bore requires careful consideration of hub-centric fitment.
What wheel size is listed in the known OEM data?
The supplied known wheel size is 20 inches in diameter by 9.0 inches wide, with ET20 offset and 5.29 inches of backspacing. This information may not represent every trim or equipment package.
What tire size is listed for this page?
The supplied known tire size is 265/60R20, with a 265 mm section width and a 60 percent aspect ratio. Confirm the tire placard on the vehicle before replacing or changing tire size.
Can I use any 8-lug wheel on this truck?
No. Eight lug holes alone do not confirm compatibility. The wheel must match the 8x180 bolt pattern and provide suitable center bore, offset, brake clearance, lug-seat compatibility, load rating, and tire fitment.
Can I install a wheel with a different offset?
A different offset changes the wheel's position relative to the hub, suspension, brakes, and fender. Use the calculator to compare the proposed offset and width, then physically check clearance and verify the wheel's load rating and manufacturer application data.
Does changing rim diameter change tire diameter?
Changing rim diameter in the calculator updates the tire diameter in the comparison. The tire's aspect ratio and section width also affect the result, so compare the complete wheel-and-tire combination rather than the rim diameter alone.
What lug thread size is known for this vehicle?
The supplied thread size is M14 x 1.5. The lug-nut seat must also match the replacement wheel, and the final torque specification should be confirmed through OEM or wheel-manufacturer documentation.
How can I confirm fitment if my trim differs?
Check the tire-and-loading information label, owner documentation, OEM parts information, and the markings on the current wheel. Then enter the measured or documented values into the on-page calculator and verify physical clearance before purchase.
Wheel interchange depends on more than bolt pattern. Where data is available, this site compares recorded OEM values:
A normal wheel spacer does not change bolt pattern. Hub rings cannot enlarge a wheel bore that is smaller than the hub. Brake clearance and tire package fitment still require vehicle-specific checks when not confirmed in the dataset.
