🔧 Radiator Hose - Replacement

This covers replacing the radiator hose on your Sierra. The steps are similar for the upper or lower hose: drain enough coolant, remove the old hose, install the new one, then refill and bleed the cooling system.

Difficulty Level: Beginner | Estimated Time: 1-2 hours

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⚠️ Safety & Precautions

• Work only on a fully cool engine. Hot coolant can cause severe burns.
• Keep hands, tools, and clothing away from the fan and belts.
• Use a drain pan and clean spills right away. Coolant is toxic to people and pets.
• Do not open the cooling system cap when hot.
• No battery disconnect is required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Flat-blade screwdriver
• Hose clamp pliers
• Drain pan
• Funnel
• Rags or shop towels
• Safety glasses
• Nitrile gloves
• Jack and jack stands rated for your Sierra
• Torque wrench

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Radiator hose - Qty: 1
• Spring hose clamps or worm-gear clamps - Qty: 2
• Dex-Cool coolant premix - Qty: 1-2 gallons

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool completely.
• If you are replacing the lower hose, raise the front of the truck and support it with jack stands.
• Place the drain pan under the radiator drain area.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Drain coolant to a safe level

• Use the drain pan under the radiator.
• Open the radiator drain if equipped, or remove the lower hose slowly to let coolant drain.
• Drain enough coolant so the level is below the hose you are replacing.
• Stop if coolant is still warm.

Step 2: Remove the old hose

• Use hose clamp pliers or a flat-blade screwdriver to move the clamps back.
• Twist the hose gently to break it loose, then pull it off the radiator neck and engine fitting.
• If the hose is stuck, work it loose by hand. Do not pry on the radiator neck.
• Inspect both fittings for rust, cracks, or old rubber stuck to the pipe.

Step 3: Install the new hose

• Compare the new hose to the old one to confirm shape and length.
• Slide the clamps onto the hose first.
• Push the hose fully onto both fittings until it seats against the stop.
• Position the clamps behind the bead on each fitting.
• If using worm-gear clamps, tighten snugly with a flat-blade screwdriver.
• Torque to snug only for worm-gear clamps. Do not crush the hose.

Step 4: Refill the cooling system

• Use a funnel to refill with the correct coolant mix.
• Fill the radiator or surge tank to the proper level.
• Start the engine and let it idle with the heater on full hot.
• Add coolant as the level drops.
• Watch for leaks at both ends of the hose.

Step 5: Bleed air and finish

• Let the engine reach operating temperature.
• Check for steady heat from the vents and normal temperature on the gauge.
• Shut the engine off and let it cool.
• Recheck the coolant level and top off if needed.
• Recheck again the next morning.

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✅ After Repair

• Inspect both hose ends for seepage after a short test drive.
• Check coolant level again when the engine is cold.
• Watch the temperature gauge for the next few drives.
• If the hose was lower and you removed more coolant, verify there are no air pockets.

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💰 DIY vs Shop Cost

Shop Cost: $180-$420 (parts + labor)

DIY Cost: $40-$120 (parts only)

You Save: $140-$300 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.5 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.