* Bolt Pattern: The bolt pattern (number of lug nuts and their spacing) is likely different. Truck and SUV bolt patterns vary even within the same manufacturer and model year.
* Wheel Offset: The offset (how far the mounting surface is from the center of the wheel) will almost certainly be different. A mismatch can cause clearance issues with the brakes, suspension, or other components.
* Brake Caliper Clearance: The 2000 Tahoe's rear disc brakes require significantly more clearance than drum brakes. A wheel designed for drum brakes will likely interfere with the caliper.
* Hub Size: The size of the hub (the central part of the wheel that fits over the axle) may also be different.
Before attempting to mount any wheels, you MUST verify that the bolt pattern, wheel offset, and brake caliper clearance are all compatible. Using incompatible wheels is extremely dangerous and could lead to wheel separation and a serious accident. Consult a tire shop or a reliable parts catalog to confirm compatibility.
