To find it, you'll need to:
1. Consult your owner's manual: This is the best resource. The manual will have diagrams showing the location of all major components, including the oil filter.
2. Search online: Search for "[Your Vehicle Make and Model] 2004 4.3L V6 oil filter location" on Google, YouTube, or a car forum. Images and videos can be incredibly helpful.
3. Look under the hood: With the engine cool, carefully examine the area under the engine and around the oil pan. The filter is usually a cylindrical canister, often with a slightly protruding cap or fitting.
Safety First: Before attempting any work on your vehicle, ensure the engine is completely cool. Use jack stands for safety if working underneath the car. Improperly handling oil can result in burns or environmental damage.