🔧 Transmission Fluid - Drain and Fill

On your Equinox, the automatic transmission fluid service is a drain-and-fill procedure with a fluid level check at the correct temperature. This is not a simple “add fluid until full” job, because the level has to be set by the check plug with the transmission warm. Assumption: factory-style service on the 6-speed automatic.

Difficulty Level: Intermediate | Estimated Time: 1.5-2.5 hours

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⚠️ Safety & Precautions

• Work on level ground with the parking brake set.
• Use jack stands. Never rely on a floor jack alone.
• Transmission fluid can be hot. Wear gloves and safety glasses.
• Keep dirt out of the fill and check openings. Clean the area first.
• Do not overfill. Incorrect level can cause shift issues and damage.
• No battery disconnect is required for this service.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Drain pan
• 3/8-inch drive ratchet
• 8mm socket
• 10mm socket
• Torque wrench
• Fluid transfer pump
• Scan tool or temperature-capable code reader
• Shop towels
• Funnel

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Automatic transmission fluid, DEXRON-VI - Qty: 5-7 quarts
• Transmission drain plug seal - Qty: 1
• Transmission fluid level check plug seal - Qty: 1

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📋 Before You Begin

• Park on a level surface.
• Let the transmission cool if the vehicle has been driven recently.
• Raise and support the vehicle so it stays level.
• Have the new fluid ready before opening the transmission.
• Set up your scan tool to read transmission fluid temperature before final level check.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and secure the vehicle

• Use a floor jack and jack stands to raise the Equinox level and secure it safely.
• Place wheel chocks at the wheels still on the ground.
• Make sure the vehicle is level before the final fluid check.

Step 2: Remove the splash shield

• Use a 10mm socket or 8mm socket to remove the lower splash shield fasteners.
• Set the shield and fasteners aside.

Step 3: Drain the old transmission fluid

• Place a drain pan under the transmission drain plug.
• Use a 3/8-inch drive ratchet to remove the drain plug.
• Let the fluid drain completely.
• Replace the drain plug seal with a new one.
• Install the drain plug and Torque to 18 Nm (13 ft-lbs).

Step 4: Refill the transmission

• Locate the fill port on the transmission.
• Use a fluid transfer pump and funnel to add DEXRON-VI ATF through the fill opening.
• Start with about 4 quarts, then continue after the level check.

Step 5: Start and circulate the fluid

• Start the engine with the parking brake applied.
• With your foot on the brake, move the shifter slowly through each gear position and back to Park.
• This helps fill the valve body and passages.

Step 6: Set the fluid level by temperature

• Use the scan tool or temperature-capable code reader to watch transmission fluid temperature.
• At the correct service temperature, remove the fluid level check plug with a 3/8-inch drive ratchet.
• If fluid dribbles out, the level is near correct.
• If no fluid comes out, add ATF through the fill port until a steady dribble starts.
• When the dribble slows to a thin stream or drip, reinstall the check plug with a new seal and Torque to 12 Nm (106 in-lbs).

Step 7: Reinstall the splash shield

• Use the 8mm socket or 10mm socket to reinstall the shield fasteners.
• Make sure all clips and screws are seated properly.

Step 8: Lower the vehicle and verify operation

• Lower the vehicle carefully with the floor jack.
• Check for leaks around the drain and level plugs.
• Take a short test drive and make sure shifts feel normal.

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✅ After Repair

• Recheck for leaks after the test drive.
• Verify the transmission shifts smoothly through all gears.
• Recheck fluid level only if the service procedure calls for it and the transmission is at the proper temperature.
• If the fluid was badly burnt or contaminated, a second drain-and-fill may help improve fluid quality.

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💰 DIY vs Shop Cost

Shop Cost: $180-$320 (parts + labor)

DIY Cost: $70-$140 (parts only)

You Save: $110-$180 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.