* Model: The specific model of the truck (e.g., Silverado 1500, Silverado 2500HD, Avalanche, etc.) matters significantly. Even within the same model year, there can be variations in wheel bolt patterns.
* Bolt Pattern: This is the most crucial factor. The number of lug nuts and the distance between them must match exactly. A mismatch here is dangerous and will prevent the wheels from mounting.
* Wheel Offset: The offset determines how far the wheel sits in or out from the hub. A significantly different offset can cause clearance problems with the suspension, brakes, or fenders.
* Center Bore: The diameter of the hole in the center of the wheel that fits over the hub. An improperly sized center bore can cause the wheel to wobble or not seat properly.
To be absolutely certain, you need to:
1. Find the specifications for both the 2007 and 2009 Chevy truck wheels. Look for the bolt pattern (e.g., 6x139.7mm or 6x5.5"), wheel offset, and center bore diameter. This information is usually found stamped on the wheel itself, in the owner's manual, or online through a parts website using the VIN number.
2. Compare the specifications. If all three specifications match exactly, the rims *should* fit. Even a slight difference in offset can lead to issues.
In short: Don't assume they'll fit. Verify the specifications before attempting to mount the wheels. A mismatch can lead to dangerous driving conditions.
