What you'll need:
* New oil: Consult your owner's manual for the correct type and quantity (usually 5W-30 or 10W-30, around 4.5-5 quarts).
* New oil filter: Again, check your manual for the correct filter. Have the old one handy for comparison.
* Oil filter wrench: The correct size will depend on your filter.
* Wrench for the drain plug: Usually a 15mm or 14mm socket. Have a drain pan ready.
* Funnel: To pour in the new oil.
* Jack and jack stands (or ramps): Essential for safety. Never work under a car supported only by a jack.
* Gloves: To keep your hands clean.
* Rags or shop towels: For spills and cleanup.
* Torque wrench (optional but recommended): To tighten the drain plug to the correct specification.
Procedure:
1. Warm up the engine: Run the engine for 5-10 minutes to warm the oil, making it flow more easily.
2. Secure the vehicle: Safely raise the front of the car using a jack and secure it on jack stands. If using ramps, drive the car onto them carefully.
3. Locate the oil drain plug: It's usually located on the bottom of the oil pan, towards the front of the engine.
4. Position the drain pan: Place the drain pan under the drain plug.
5. Remove the drain plug: Carefully loosen and remove the drain plug using the appropriate wrench. Be cautious as the oil will be hot. Let the oil drain completely (this can take 15-20 minutes).
6. Locate the oil filter: This is usually accessible from the top or side of the engine. Consult your owner's manual for exact location.
7. Remove the oil filter: Use the oil filter wrench to loosen and remove the old filter. Have a rag handy as some oil will likely spill.
8. Lubricate the new oil filter gasket: Lightly lubricate the rubber gasket on the new oil filter with fresh oil.
9. Install the new oil filter: Screw on the new oil filter by hand until it's snug. Then tighten it according to the instructions on the filter (usually about ¾ to 1 full turn after it contacts the engine).
10. Replace the drain plug: Once the oil has completely drained, replace the drain plug and tighten it securely with the wrench. Do not overtighten. Use a torque wrench if possible to tighten to the specified torque value in your owner's manual.
11. Lower the vehicle: Carefully lower the car using the jack.
12. Add new oil: Using the funnel, pour the correct amount of new oil into the engine. Check your owner's manual for the exact capacity.
13. Check the oil level: Use the dipstick to check the oil level. Add more oil if needed to reach the "full" mark.
14. Run the engine: Run the engine for a few minutes.
15. Check for leaks: Check under the car for any oil leaks around the drain plug and oil filter.
16. Check the oil level again: After running the engine, turn it off and wait a few minutes. Recheck the oil level and add more if necessary.
Important Safety Notes:
* Always work in a well-ventilated area.
* Wear appropriate safety glasses and gloves.
* Dispose of used oil properly at a designated recycling center.
* Never work under a vehicle supported only by a jack. Always use jack stands.
This is a general guide. Consult your owner's manual for detailed instructions and specifications specific to your 2004 Pontiac Grand Prix GT. If you are uncomfortable performing this task yourself, take your vehicle to a qualified mechanic.
