* Cost-effectiveness: It may be more cost-effective for AutoZone to sell hub assemblies rather than separate wheel bearings. This is because the hub assembly includes all of the necessary components to replace the wheel bearing, such as the bearing itself, the hub, and the seals. By selling the hub assembly as a single unit, AutoZone can save money on packaging and shipping costs, and pass those savings on to the customer.
* Ease of installation: Hub assemblies are also easier to install than separate wheel bearings. This is because the hub assembly is a single unit that can be bolted onto the vehicle. On the other hand, separate wheel bearings require the installer to remove the hub, press the old bearing out, and press the new bearing in. This process is more time-consuming and requires specialized tools.
* Quality control: Selling hub assemblies rather than separate wheel bearings allows AutoZone to maintain better quality control. This is because the hub assembly is a single unit that has been tested and certified by the manufacturer. By contrast, separate wheel bearings may not be as rigorously tested, and could lead to problems down the road.
For these reasons, it is likely that AutoZone has decided to only sell hub assemblies for 2002 Silverados. This decision may be based on cost-effectiveness, ease of installation, and quality control.
