🔧 Water Pump - Replacement

Your water pump circulates coolant through the engine to keep it from overheating. On your Silverado, the job usually involves removing the belt drive components, fan assembly, hoses, and the pump itself, then refilling and bleeding the cooling system afterward.

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

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⚠️ Safety & Precautions

• Let the engine cool completely before opening the cooling system.
• Coolant is toxic and can cause burns. Wear gloves and safety glasses.
• Disconnect the negative battery cable before working near the fan and belt drive.
• The cooling fan area has sharp edges and tight clearance. Keep hands clear.
• Use a drain pan. Coolant spills are slippery and hazardous.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 13mm socket
• 15mm socket
• Ratchet
• Long extension
• Breaker bar
• Belt tensioner tool (specialty)
• Fan clutch wrench (specialty)
• Drain pan
• Funnel
• Plastic scraper
• Torque wrench
• Gloves
• Safety glasses
• 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: 2-3 gallons
• Thermostat gasket - Qty: 1
• Serpentine belt - Qty: 1
• Coolant hose clamps - Qty: As needed

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool fully before draining coolant.
• Disconnect the negative battery cable.
• Raise the front if needed and support it with jack stands.
• Have fresh coolant ready so you can refill right away.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Drain the cooling system

• Place a drain pan under the radiator drain area.
• Open the radiator drain and drain enough coolant to get below the water pump level.
• Keep coolant off belts and pulleys.

Step 2: Remove the fan and shroud

• Use the fan clutch wrench to loosen the fan clutch from the water pump pulley.
• Use the 10mm socket to remove the fan shroud fasteners, then lift the fan and shroud out together if possible.
• Lift straight up to avoid damaging the radiator.

Step 3: Remove the serpentine belt

• Use the belt tensioner tool or 15mm socket to relieve tension.
• Slip the belt off the water pump pulley and remove it.
• Inspect the belt. Replace it if cracked, glazed, or oily.

Step 4: Remove the water pump pulley

• Use the 10mm socket to remove the pulley bolts.
• Remove the pulley and set it aside in order.

Step 5: Disconnect hoses and remove the old pump

• Use pliers or a small wrench if needed to loosen hose clamps.
• Remove the bypass and radiator hoses from the pump.
• Use the 13mm socket to remove the water pump bolts.
• Pull the pump off the engine.
• Keep track of bolt lengths and locations.

Step 6: Clean the mounting surface

• Use a plastic scraper to remove old gasket material from the engine side.
• Wipe the surface clean and dry.
• Do not gouge the aluminum surface.

Step 7: Install the new water pump

• Install the new gasket on the pump or engine side as designed.
• Set the new pump in place by hand.
• Install the bolts finger-tight first, then tighten evenly in a crisscross pattern.
• Torque the water pump bolts to 30 Nm (22 ft-lbs).

Step 8: Reinstall hoses, pulley, belt, and fan

• Reconnect all hoses and secure the clamps.
• Install the water pump pulley and tighten the bolts with the 10mm socket.
• Torque the pulley bolts to 25 Nm (18 ft-lbs).
• Route the serpentine belt using the belt routing diagram under the hood.
• Reinstall the fan and shroud.
• Torque the fan clutch to OEM spec for the fan hub.

Step 9: Refill and bleed the cooling system

• Close the drain.
• Use a funnel to refill with the correct coolant mix.
• Start the engine with the heater set to hot.
• Watch the coolant level and add more as air bleeds out.
• Top off the overflow reservoir to the correct mark.

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✅ After Repair

• Check for leaks at the pump, hoses, drain, and clamps.
• Let the engine reach operating temperature and confirm stable coolant flow.
• Recheck coolant level after a full cool-down.
• Watch the temperature gauge during the first drive.

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💰 DIY vs Shop Cost

Shop Cost: $650-$1,100 (parts + labor)

DIY Cost: $120-$280 (parts only)

You Save: $530-$820 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?

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.