🔧 Transmission Fluid - Fluid Change

This service drains the old automatic transmission fluid, replaces the filter and pan gasket if you’re doing a full service, then refills with the correct GM-spec fluid. Your Silverado uses a sealed-style transmission with no dipstick, so fluid level must be checked through the case fill/check ports at the correct temperature.

Difficulty Level: Intermediate | Estimated Time: 2-4 hours

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⚠️ Safety & Precautions

• Work on a level surface with the parking brake set and wheels chocked.
• Transmission fluid can be hot enough to burn; let the truck cool before opening the pan.
• Use jack stands. Never rely on a floor jack alone.
• This transmission must be filled and checked at the specified fluid temperature range.
• 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 (rated 3-ton minimum)
• Wheel chocks
• Drain pan
• 8mm socket
• 10mm socket
• 15mm socket
• Torque wrench
• Ratchet
• Long funnel
• Fluid transfer pump
• Trim tool (specialty)
• Lint-free rags
• Safety glasses
• Nitrile gloves
• Scan tool with transmission temperature data

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Automatic transmission fluid, Dexron VI - Qty: 10-12 quarts
• Transmission filter - Qty: 1
• Transmission pan gasket - Qty: 1
• Transmission pan bolts - Qty: 1 set if needed
• Transmission drain plug seal - Qty: 1 if equipped

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📋 Before You Begin

• Park on level ground and let the transmission cool down.
• Raise the truck safely and support it with jack stands.
• Have enough Dexron VI ready before you start.
• If your truck has a skid plate in the way, remove it first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and secure the truck

• Use a floor jack and jack stands to lift the truck level and support it securely.
• Set wheel chocks behind the wheels that stay on the ground.
• Keep the truck as level as possible.

Step 2: Remove any skid plate or splash shield

• Use the 15mm socket or 10mm socket to remove any cover blocking the transmission pan.
• Set the hardware aside in order.

Step 3: Drain the transmission fluid

• Place a drain pan under the transmission pan.
• If equipped with a drain plug, use the 15mm socket to remove the drain plug and drain the fluid.
• If there is no drain plug, loosen the pan bolts with the 10mm socket and lower one side slowly to control the flow.
• Tighten the drain plug to 20 Nm (15 ft-lbs) if it was removed.

Step 4: Remove the transmission pan

• Use the 10mm socket to remove the pan bolts.
• Lower the pan carefully and pour out any remaining fluid.
• Inspect the pan for excessive metal debris. A small amount of gray paste is normal.
• Take your time here to avoid spills.

Step 5: Replace the filter

• Pull the old filter straight down by hand or with the trim tool if needed.
• Make sure the old seal comes out with the filter.
• Install the new filter firmly into place.

Step 6: Clean and reinstall the pan

• Clean the pan and magnet with lint-free rags.
• Install the new pan gasket.
• Raise the pan into place and start all bolts by hand with the 10mm socket.
• Tighten the pan bolts to 12 Nm (106 in-lbs) in a crisscross pattern.

Step 7: Refill with fluid

• Use the fluid transfer pump and funnel to add Dexron VI ATF through the fill port.
• Add about 5-6 quarts to start if you drained only the pan. If the system was opened more, it may take more.
• Tighten the fill plug to 30 Nm (22 ft-lbs).

Step 8: Warm the transmission and check level

• Start the engine and let it idle.
• With your foot on the brake, shift slowly through all gears, then back to Park.
• Use the scan tool to monitor transmission fluid temperature.
• When the fluid is at the correct check range, remove the level/check plug with the 10mm socket.
• If fluid drips out in a thin stream, the level is correct.
• If no fluid comes out, add fluid in small amounts until it just starts to overflow.
• Tighten the level/check plug to 12 Nm (106 in-lbs).

Step 9: Reinstall any covers and lower the truck

• Reinstall the skid plate or splash shield with the 10mm socket or 15mm socket.
• Lower the truck carefully off the jack stands.

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✅ After Repair

• Start the truck and check underneath for leaks.
• Road test gently and confirm smooth shifting.
• Recheck for leaks after the test drive.
• If shift quality is still poor, the transmission may need a scan for codes or a relearn procedure.

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💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $90-$180 (parts only)

You Save: $160-$270 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?

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