What You'll Need:
* New oil: Check your owner's manual for the correct type and quantity. (Typically 5W-30 or 10W-30)
* New oil filter: Again, check your owner's manual for the correct type.
* Oil filter wrench: The correct size for your Blazer's oil filter. A cap-type wrench is often easiest.
* Wrench for the drain plug: Usually a 15mm or 17mm, but check your manual.
* Drain pan: Large enough to hold at least 5 quarts of oil.
* Funnel: To avoid spills when adding new oil.
* Jack and jack stands (or ramps): Never work under a vehicle supported only by a jack.
* Wheel chocks: For added safety.
* Gloves: To keep your hands clean.
* Rags or paper towels: For cleanup.
Procedure:
1. Safety First: Park your Blazer on a level surface, engage the parking brake, and use wheel chocks on the wheels that are not being lifted. Let the engine cool down completely before starting. This prevents burns.
2. Preparation: Locate the oil drain plug underneath the engine (usually on the oil pan). Locate the oil filter, typically on the side of the engine block.
3. Jacking and Securement: Safely jack up the front of your Blazer and securely place it on jack stands.
4. Drain the Old Oil: Position the drain pan under the drain plug. Carefully loosen and remove the drain plug using the correct wrench. Let the oil drain completely. This can take 15-20 minutes. Be cautious, as the oil will be hot.
5. Replace the Drain Plug: Once the oil has drained, carefully replace the drain plug and tighten it to the manufacturer's specified torque (check your owner's manual). Don't overtighten!
6. Change the Oil Filter: Use the oil filter wrench to loosen and remove the old oil filter. Lightly lubricate the rubber gasket on the new oil filter with fresh oil. Screw on the new filter by hand, tightening it according to the instructions on the filter (usually about ¾ to 1 full turn after the gasket contacts the engine).
7. Add New Oil: Using the funnel, carefully add the correct amount of new oil (specified in your owner's manual). It's usually around 5 quarts, but check your manual to be sure.
8. Check the Oil Level: Use the dipstick to check the oil level. Add more oil if needed, ensuring it's between the minimum and maximum marks.
9. Lower the Vehicle: Carefully lower your Blazer from the jack stands.
10. Run the Engine: Start the engine and let it run for a few minutes. Check for any leaks around the drain plug and oil filter.
11. Recheck the Oil Level: After running the engine, turn it off and wait a few minutes for the oil to settle. Recheck the oil level using the dipstick and add more oil if necessary.
12. Disposal: Dispose of the used oil and filter properly at a recycling center or auto parts store.
Important Notes:
* Always double-check the type and amount of oil and the correct oil filter before you begin.
* Be careful when handling hot oil.
* If you're unsure about any part of this process, it's best to take your Blazer to a qualified mechanic.
This guide provides general instructions. Always consult your owner's manual for your specific 2002 Chevy Blazer model for the most accurate and safe procedure.
