How to Change the Transmission Oil in Chevrolet Cars

by Contributing Writer; Updated June 12, 2017

Maintaining the transmission in your Chevrolet car Chevy Chevrolet car as part of normal vehicle maintenance routine will help ensure a long and trouble-free driving life. This type of maintenance service is often overlooked because of the extended mileage interval between transmission fluid and filter changes. Chevy also has yet to add a transmission fluid maintenance reminder light similar to the engine oil change light, so without a reminder, this service can go unattended until it's to late.

Under The Hood:

 How to Change the Transmission Oil in a 2005 Chevy Malibu

Raise the front end of your Malibu with a jack using the jack markers located on either side of the vehicle. Set the emergency brake.

Secure your vehicle with the jack stands on each side. For additional security, add a brick behind each rear tire. Wear your protective glasses and gloves.

Locate the transmission. Look for a small plug with a hex bolt on the passenger side of the transmission, adjacent to the passenger side front tire. Place the oil pan under the transmission to catch the fluid.

Unscrew the hex bolt using the 10 millimeter and 1/2" socket and ratchet. Use the rubber mallet to gently tap on the pan to drain the fluid.

Remove the remaining bolts and lower the pan.

Use the flat-head screwdriver to remove the gasket.

Remove the transmission filter. Wipe any excess fluid with the disposable rag.

Install the new filter and gasket. Re-install the pan by tightening the hex bolt and the securing bolts.

Lower the vehicle. Locate the red transmission cap under the hood.

Insert the funnel and add the 7 quarts of transmission fluid up to the full marker. Do not overfill.

Start the vehicle and let it run for 5 to 10 seconds.

Gently switch gears. There should be a smooth transition from one gear to another. Place your Malibu in park. Activate the emergency brake and check the floor for any leaks.

Items you will need

  • Oil pan

  • Protective glasses

  • Gloves

  • 7 quarts of Dexron III automatic transmission fluid

  • Rubber mallet

  • Funnel

  • Gasket

  • Transmission filter

  • 10 millimeter and 1/2" socket and ratchet

  • Long flat-head screwdriver

  • Jack

  • 2 jack stands

  • 2 bricks

  • Disposable rag

 How to Change the Transmission Oil in a 2006 Chevrolet Impala

Set the parking brake and block the rear wheels with the wheel chocks. Position the floor jack under the Impala's large aluminum front sub-frame and lift the car until there is enough room to work underneath the car. Slide jack stands under the right and left sides of the sub-frame and lower the car onto the stands for safety. Remove the floor jack.

Place a drain pan under the transmission pan located behind the oil pan slightly toward the driver's side of the car. Select a 10 mm socket, extension bar and ratchet from the socket set and place it near the drain pan under the car.

Slide under the Impala and remove the 10 mm bolts that attach the transmission pan to the transmission using the socket, extension and ratchet. Start from one corner and remove the bolts so that as the bolts are removed the corner will drop slightly and the transmission fluid can drain into the drain pan. This will minimize spills.

Lower the pan from the transmission. If the pan it stuck to the transmission by the gasket, gently pry it loose with a screwdriver, being careful not to bend the pan's mounting surface. Remove the transmission filter by prying it out of the transmission using a screwdriver. Gently pry the old rubber filter seal out of the transmission using a screwdriver.

Remove the old gasket form the pan and clean the pan thoroughly with degreaser. Wipe any transmission fluid off of the transmission mounting surface and attach the new pan gasket to the pan with gasket adhesive. Push the new seal into the transmission and push the new filter into the seal.

Bolt the transmission pan back into place on the transmission and tighten the 10 mm bolts securely. Slide the drain pan and your tools out from under the car. Raise the car off the stands, remove the stands, and lower the car to the ground.

Remove the dipstick from the dipstick tube and insert the transmission funnel in it's place. Pour 4 qts. of the Dexron-3 transmission fluid into the transmission. Remove the funnel and reinstall the dipstick.

Start the engine and shift the transmission gear selector through all of the gears twice. Check the fluid level on the dipstick and add fluid one pt. (half-qt.) at a time until the level is in the cross-hatch area on the stick.

Items you will need

  • Wheel chocks

  • Floor jack

  • Jack stands

  • Socket set

  • Drain pan

  • Gasket adhesive

  • Filter and gasket kit

  • Transmission funnel

  • Dexron-3 transmission fluid

 How to Change the Transmission Oil on a Duramax

Place the oil pan under the transmission.

Crawl under the truck and locate the drain bolt on the bottom of the transmission. Turn the bolt counterclockwise with a socket wrench to remove it.

Let the transmission oil drain into the oil pan.

Replace the drain bolt and tighten it.

Open the hood and pull the transmission dipstick out of the transmission filler tube. Place a funnel into the filler opening and pour in the new transmission fluid. The transmission should hold 7.4 quarts of fluid since you are not completely flushing the system.

Wipe off the dipstick and put it back into the filler tube. Pull the dipstick back out and examine it. The fluid level should be between the upper and lower marks on the tip of the dipstick.

Items you will need

  • 7.4 quarts of new transmission oil

  • Socket wrench with socket set

  • Oil catch pan

  • Shop rags

  • Funnel

 How to Change Transmission Oil in a Chevy S-10

Manual Transmission

Raise the truck and support it on jack stands. Place a drain pan underneath the transmission at the drain plug; rags and newspapers also help.

Remove the drain plug on the transmission, which is the lower of the two plugs and will likely require a hex wrench to remove. Allow the fluid to drain into the pan then reconnect the plug.

Disconnect the fill plug, located above the drain plug.

Fill the transmission case with fresh transmission fluid using a syringe bottle or hand pump--make sure this tool has never been used for any other task. Add fluid until it starts leaking out the fill hole then replace the plug.

Lower the car.

Automatic Transmission

Raise the truck, support it on jack stands and place the drain pan under the transmission pan.

Unscrew and remove the mounting bolts on the side and the rear of the transmission pan. Loosen the bolts on the rear by about four turns without removing them. Pry the pan loose with a screwdriver and pour the fluid into the drain pan.

Remove the pan by removing the remaining bolts and pour any remaining fluid into the drain pan.

Clean the entire transmission pan with solvent and dry it with compressed air.

Remove and replace the filter on the transmission by rotating it out of its retaining clip. Remove the filter's seal from the transmission with a screwdriver if it didn't come off with the pan. Install a new seal with a socket and install the new filter.

Connect a new gasket to the transmission pan--make sure the pan's surface is clean--then install the pan back onto the transmission, tightening each bolt a quarter turn at a time.

Lower the truck off the jack stands using the floor jack.

Add 3-1/2 to four quarts of automatic transmission fluid through the filler tube in the engine compartment.

Items you will need

  • Jack

  • Jack stands

  • Compressed air

  • Wrench

  • Five-quart drain pan

  • Newspapers

  • Towels

  • Transmission fluid

  • Syringe or hand pump

  • Transmission fluid filter (automatic transmission)

  • Gasket (automatic)