🔧 Water Pump - Replacement

Your Silverado’s water pump circulates coolant through the engine. When it starts leaking, making noise, or the engine runs hot, replacement is the fix. This job involves draining coolant, removing the belt-driven pump, cleaning the mounting surface, and refilling and bleeding the cooling system.

Difficulty Level: Intermediate | Estimated Time: 3-5 hours

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⚠️ Safety & Precautions

• Work only on a fully cooled engine. Hot coolant can cause serious burns.
• Do not open the cooling system cap when the engine is hot.
• Use jack stands if you raise the front of the truck.
• Keep coolant off the belt and pulleys. Contamination can cause squeal and slip.
• Disconnect the negative battery cable if your hands will be near the fan area for an extended period.
• Dispose of old coolant properly. It is toxic.

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🔧 Required Tools

You'll need the following tools for this repair:

• 1/4-inch drive ratchet
• 3/8-inch drive ratchet
• 10mm socket
• 15mm socket
• 18mm socket
• Torque wrench
• Serpentine belt tool
• Drain pan
• Coolant funnel
• Pliers
• Pick tool
• Plastic scraper
• Shop towels
• Safety glasses
• Mechanic gloves
• Jack stands
• Floor jack (rated 3-ton minimum)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Water pump - Qty: 1
• Water pump gasket - Qty: 1
• Engine coolant - Qty: 2 gallons
• Thermostat gasket or seal - Qty: 1
• Serpentine belt - Qty: 1
• Water pump pulley bolts - Qty: 1 set

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool completely.
• Raise the front of the truck only if needed for drain access.
• Have a drain pan ready before opening the cooling system.
• If your truck has a belt routing sticker, take a photo before removing the belt.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Drain the coolant

• Place the drain pan under the radiator drain area.
• Open the radiator drain and drain enough coolant to get below the water pump level.
• Move the coolant into a sealed container when finished.
• Keep pets away from spilled coolant.

Step 2: Remove the serpentine belt

• Use the serpentine belt tool or 15mm socket on the belt tensioner.
• Rotate the tensioner to release belt tension.
• Slip the belt off the water pump pulley and move it aside.
• If the belt is cracked or glazed, replace it now.

Step 3: Remove the water pump pulley

• Use the 15mm socket to remove the water pump pulley bolts.
• Hold the pulley steady by hand while loosening the bolts.
• Remove the pulley and set it aside.
• Torque on reassembly: 25 Nm (18 ft-lbs)

Step 4: Remove hoses and pump bolts

• Use pliers to release the hose clamps on the water pump hoses.
• Twist and pull the hoses free.
• Use the 10mm socket to remove the water pump mounting bolts.
• Keep track of bolt lengths and locations.

Step 5: Remove the water pump

• Pull the water pump away from the engine.
• If it sticks, tap gently with your hand to break the seal.
• Remove the old gasket and clean the mounting surface with a plastic scraper.
• Do not gouge the aluminum surface.

Step 6: Install the new water pump

• Install the new water pump gasket on the new pump.
• Position the new pump on the engine by hand.
• Start all bolts by hand first to avoid cross-threading.
• Use the 10mm socket to tighten the bolts evenly in a crisscross pattern.
• Torque to 25 Nm (18 ft-lbs)

Step 7: Reinstall hoses, pulley, and belt

• Reconnect the coolant hoses and secure the clamps with pliers.
• Install the pulley using the 15mm socket.
• Torque the pulley bolts to 25 Nm (18 ft-lbs)
• Route the serpentine belt correctly and release the tensioner slowly.

Step 8: Refill and bleed the cooling system

• Close the drain.
• Use the coolant funnel to fill the system with the correct coolant mix.
• Start the engine and let it idle with the heater set to hot.
• Watch the coolant level and top off as air bleeds out.
• Check for leaks around the pump, hoses, and pulley area.

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✅ After Repair

• Let the engine reach operating temperature and confirm normal gauge readings.
• Inspect again for coolant leaks after the engine cools down.
• Recheck coolant level the next morning and top off if needed.
• Listen for belt noise. A squeal can mean misrouted belt or coolant contamination.

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💰 DIY vs Shop Cost

Shop Cost: $650-$1,050 (parts + labor)

DIY Cost: $180-$350 (parts only)

You Save: $470-$700 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-5 hours.

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🎯 Ready to get started?

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