Question about 2003 Oldsmobile Alero

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Low Transmission Fluid in 2003 Oldsmobile Alero

Needed to check transmission fluid however it only has a fill plug. There is no dipstick like a normal car.
What is the procedure to check?
What type of tranny fluid required?
Manual not available.

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  • This care does not have a dipstick but can easily be checked at home.

  1. 1. Warm the car up to running temperature.
  2. 2. Park it on a level surface.
  3. 3. Leave the car running and set the emergency /parking brake. Also set bricks in front and behind the wheels.
  4. 4. Look on the passenger side of the transmission (underneath the car)
  5. 5. You will see a 10mm bolt a little bit inward from the right axle on the transmission itself.
  6. 6. Have a drain pan ready and pull that bolt.
  7. 7. If fluid comes out it is full.
  8. 8. If no fluid comes out then add ATF III in the fill port on top of the transmission until the fluid just barely seeps out of that hole you removed the bolt from.
  9. 9. This port is on top of the transmission (under the hood) and is usually red or black in color.
  10. 10. The transmission is now full and ready to go.
  • Hope this helps.

Posted on Nov 03, 2011

  • Iron
    Iron Nov 03, 2011

    Oldsmobile says to use Alero "F" transmission fluid but ATF III will work just as well. It has the same friction modifier as the Alero "F" does and is a bit cheaper (price wise) as well.


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I own a 2002 alero, same problem needed to check fluid level. Only one problem you have to take back to factory to get that procedure done. good luck

Posted on Jul 31, 2009


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  1. Start the engine and allow the engine to idle until the transmission fluid normal operating temperature has been reached.
  2. Depress the brake pedal and move the shift lever through the gear ranges, pausing a few seconds in each range. Return the shift lever to the PARK range.
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The only way to check the fluid is with the vehicle running and up on a lift. Let me know and I will send you the procedure.

Let me know, if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

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