What bolt pattern is a 1990 Chevy?
Bolts patterns vary by model; most 1990 Chevrolets used 5x4.75 inches, but some trucks and SUVs used 6x5.5 inches.
The 1990 Chevrolet lineup covered a wide range of vehicles—from compact cars to full-size pickups. Because wheel patterns aren’t universal across the line, identifying the exact bolt pattern requires knowing the specific model and trim. This guide outlines the patterns you’re most likely to encounter and how to verify yours.
Common bolt patterns for 1990 Chevrolet models
Before listing patterns, note that the number of lug holes and the diameter of the lug circle define the bolt pattern. The patterns below are the ones you’re most likely to see on a 1990 Chevy, depending on body style and drivetrain.
- 5 lug holes on a 4.75-inch bolt circle (5x4.75 in, 120.65 mm): the typical pattern for many GM passenger cars of the era (examples include many Cavaliers, Camaros/Firebirds, Berettas, Luminas, etc.).
- 6 lug holes on a 5.5-inch bolt circle (6x5.5 in, 139.7 mm): used by many GM full-size pickups and SUVs of the period (C/K trucks, Suburban, Tahoe, etc.).
There can be exceptions based on the exact model and trim, so always verify with the owner’s manual, VIN-derived data, or a reliable parts catalog.
How to verify your bolt pattern
Use these steps to confirm the bolt pattern on a 1990 Chevy without guessing:
- Count the number of lug studs on the hub (common counts are 4, 5, or 6).
- Measure the distance between the centers of opposite lug holes to obtain the bolt circle diameter.
- Check the wheel hub bore size to ensure compatibility with wheels you plan to install.
- Cross-reference the model, year, and trim in a reliable parts catalog or the vehicle’s manual.
When replacing wheels, also consider the offset, width, and load rating to ensure a proper and safe fit.
Summary
The bolt pattern for a 1990 Chevrolet is not universal. Most passenger cars used 5x4.75 inches, while many full-size trucks and SUVs used 6x5.5 inches. Always confirm the exact specification for your specific model and trim using the manual or VIN-based resources to ensure a precise match.
