How to Check the Transmission Fluid Level on a 1999 Alero

by Grace Mclain
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The transmission fluid checking process on the 1999 Alero requires a different method than most vehicles. The Alero comes equipped with an automatic transmission that needs fluid to keep all the moving parts cool. Once the transmission fluid breaks down, it needs to be replaced. Oldsmobile recommends changing the fluid every 40,000 to 50,000 miles.

Step 1

Drive the car around for about 10 minutes to heat up the transmission fluid and thin it. This will give you a more accurate fluid level reading.

Step 2

Park the car on a level surface and turn the engine off. Pop the hood. Locate the transmission fill cap, on the the passenger side of the transmission housing. Standing in front of the car on the passenger side, look down through the rear of the engine compartment near the air filter housing, and you will see the red transmission filler plug on the side. You can reach this plug with your hands and the ratchet from the top of the engine.

Step 3

Put the ratchet and socket onto the transmission fill plug. Turn the fill plug counter-clockwise to loosen and remove the fill plug. Stick your finger inside the fill hole. If you can feel the transmission fluid on your finger, proceed to step 4.

Step 4

Crank the engine while the filler plug is off. Stick your finger inside the filler plug and check the fluid level. The fluid level should be directly below the filler hole while the engine is running to be considered full. If the fluid is not directly below the filler hole, add fluid until it starts to come out of the hole.

Step 5

Screw the fill plug back in and tighten the plug.

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