🔧 Transmission Fluid - Drain & Refill

Changing the transmission fluid on your Silverado helps protect the clutch packs, valves, and seals from heat and wear. This is a drain-and-refill service, not a full flush, so it replaces most of the old fluid without forcing debris through the unit.

Difficulty Level: Intermediate | Estimated Time: 1.5-3 hours

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⚠️ Safety & Precautions

• Work on a level surface and support the truck with jack stands; never rely on a jack alone.
• Transmission fluid can be hot. Let the truck cool before starting.
• Keep dirt out of the transmission. Clean the pan area before opening it.
• If your truck has a sealed fill/check setup, the fluid level must be set with the fluid at the correct temperature.
• 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
• Drain pan
• 8mm socket
• 10mm socket
• 3/8-inch ratchet
• Torque wrench
• Funnel
• Fluid transfer pump
• Safety glasses
• Nitrile gloves
• Shop towels

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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 pan gasket - Qty: 1
• Transmission filter - Qty: 1
• Transmission filter seal - Qty: 1
• Transmission pan bolts - Qty: 1 set

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📋 Before You Begin

• Park on level ground.
• Set the parking brake.
• Chock the rear wheels.
• Raise the truck only as high as needed and support it securely on jack stands.
• If your transmission has a dipstick, warm the truck briefly first so the fluid drains easier.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and secure the truck

• Use a floor jack to raise the truck.
• Support it with jack stands placed at the frame.
• Make sure the truck is level side-to-side and front-to-rear.

Step 2: Drain the transmission pan

• Place a drain pan under the transmission.
• Use an 8mm socket to loosen the pan bolts slowly on one side first.
• Let the fluid drain from one corner, then remove the rest of the bolts.
• Lower the pan carefully and pour out the remaining fluid.
• Go slow to avoid a mess.

Step 3: Remove the transmission filter

• Use your hand to pull the filter straight down.
• If it has a retaining bolt on your unit, use a 10mm socket to remove it first.
• Remove the old filter seal from the valve body.

Step 4: Install the new filter

• Lubricate the new filter seal with fresh Dexron VI.
• Push the new filter into place by hand.
• If equipped with a retainer bolt, reinstall it and Torque to 4 Nm (35 in-lbs).

Step 5: Clean and reinstall the pan

• Clean the pan and magnet with shop towels.
• Remove all old gasket material from the pan and transmission case.
• Install the new pan gasket.
• Raise the pan into position and start all bolts by hand.
• Use an 8mm socket to tighten the bolts evenly in a crisscross pattern.
• Torque to 12 Nm (106 in-lbs).

Step 6: Refill with fluid

• Lower the truck to level ground.
• Use a funnel to add Dexron VI through the dipstick tube if equipped.
• If your transmission is sealed, use a fluid transfer pump through the fill port until fluid starts to dribble out.
• Start with about 5 quarts, then top off after checking level.

Step 7: Cycle the transmission and check the level

• Start the engine and let it idle.
• With your foot on the brake, move the shifter through each gear for a few seconds.
• Return to Park.
• Check the fluid level and add fluid in small amounts until it reaches the correct mark.
• If sealed-style, the final level must be checked at the specified fluid temperature.

Step 8: Inspect for leaks

• Look around the pan gasket and drain area for leaks.
• Recheck the level after a short road test.

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✅ After Repair

• Drive the truck gently and verify smooth shifting.
• Recheck for leaks after the test drive.
• Recheck the fluid level after the transmission is fully warm.
• If you replaced the filter, expect a slightly delayed shift feel for a short time as the new fluid circulates.

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💰 DIY vs Shop Cost

Shop Cost: $180-$350 (parts + labor)

DIY Cost: $60-$140 (parts only)

You Save: $120-$210 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.