To properly service the transmission fluid, you'll likely need to perform a transmission fluid and filter change. This is a more involved process requiring:
* Jack and jack stands: To safely lift the vehicle. Never work under a vehicle supported only by a jack.
* Transmission drain pan: To collect the old fluid.
* New transmission filter: This is crucial; old filters can restrict fluid flow.
* New transmission fluid: Use the correct type and amount specified in your owner's manual. The type will usually be Dexron III or Mercon, but always verify with your owner's manual.
* Wrench(es): To remove the drain plug and filter.
* Funnel: To add the new fluid.
* Torque wrench (recommended): To tighten the drain plug and filter to the correct specifications.
* Gloves: To protect your hands.
* Shop rags or paper towels: For cleanup.
The process generally involves:
1. Locate the transmission drain plug and pan: This is usually on the bottom of the transmission.
2. Drain the old fluid: Allow ample time for the fluid to drain completely.
3. Replace the transmission filter: This often involves removing the filter housing and installing a new filter. Refer to a repair manual for your specific vehicle.
4. Reinstall the drain plug: Tighten it to the correct torque specification (found in a repair manual).
5. Locate the transmission fill port: This might be on the side of the transmission, or it might require removing the transmission dipstick (if equipped) and filling through there. This is the most confusing step and a repair manual will be essential.
6. Add new transmission fluid: Fill the transmission to the correct level. This typically involves adding fluid until it overflows from the fill port or reaches the correct level on a dipstick (if equipped). Again, your owner's manual is crucial.
7. Lower the vehicle: Once complete, carefully lower the vehicle from the jack stands.
8. Check for leaks: Inspect the drain plug and filter area for any leaks.
WARNING: This is a complex procedure. Incorrectly performing this procedure can severely damage your transmission. If you are not comfortable working on your vehicle, take it to a qualified mechanic. A repair manual specific to your 1999 Chevy Blazer will be invaluable for this process. You can usually find these manuals online or at auto parts stores.
