For an Automatic Transmission:
1. Locate the transmission dipstick: This is usually a long, thin dipstick with markings on it, often near the engine or on the transmission itself. It may have a handle that pulls out. Consult your owner's manual for the exact location.
2. Check the fluid level: With the engine running and warmed up (ideally to normal operating temperature), remove the dipstick, wipe it clean with a clean rag, and reinsert it fully. Remove it again and check the fluid level against the markings on the dipstick. "Add" and "Full" are typical markings.
3. Add transmission fluid (if needed): If the level is low, add the *correct type* of transmission fluid. This is crucial. Using the wrong type can severely damage your transmission. Your owner's manual will specify the correct type (e.g., Dexron II or Dexron III). You can typically find this information on a sticker under the hood as well.
4. Use a funnel: To avoid spills, use a funnel to pour the fluid into the transmission fluid filler tube (often located near the dipstick).
5. Add slowly: Add small amounts at a time, checking the level frequently. Overfilling can be just as damaging as underfilling.
6. Check again: After adding fluid, wait a few minutes, then check the level again with the engine running.
7. Top off as needed: Continue to add fluid and check the level until it reaches the "Full" mark.
Important Considerations:
* Warm engine: The fluid level needs to be checked with the engine running and at operating temperature for accurate results.
* Correct fluid type: Using the wrong type of transmission fluid is extremely detrimental to your transmission's health. Absolutely verify the correct type.
* Leaks: If you're constantly adding transmission fluid, you likely have a leak. Find and fix the leak immediately to prevent further damage.
* Professional help: If you're unsure about any of these steps, take your S-10 Blazer to a qualified mechanic. Improperly servicing your transmission can lead to costly repairs.
* Owner's manual: Your owner's manual is the best resource for specific instructions related to your vehicle.
By following these steps carefully, you should be able to add transmission fluid to your 1989 Chevy S-10 Blazer safely and effectively. Remember, always prioritize safety and accuracy when working with your vehicle.