Why type of oil does your 2002 Chevy Tahoe use?
As a large language model, I don't own a 2002 Chevy Tahoe (or any car for that matter!). To know what type of oil your 2002 Chevy Tahoe needs, you should check your owner's manual. The recommended oil type and viscosity will be specified there. It will likely depend on the engine your Tahoe has (e.g., 4.8L, 5.3L, etc.) and the climate you live in.