🔧 Radiator Hose - Replacement

Assumption: This procedure covers the radiator hose assembly on your Sierra, with the same general method used for either the upper or lower hose.

The radiator hose carries coolant between the engine and radiator. Replacing a cracked, swollen, or leaking hose helps prevent overheating and coolant loss.

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

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⚠️ Safety & Precautions

• Let the engine go completely cold before opening the cooling system. Hot coolant can cause serious burns.
• Keep your hands and tools away from the fan. The fan can turn on automatically.
• Use caution with coolant. It is toxic to people and pets.
• Do not reuse a hose that is swollen, cracked, or oil-soaked.
• Battery disconnect is not 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 (specialty)
• Drain pan
• Pliers
• Funnel
• 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:

• Radiator hose - Qty: 1
• Coolant - Qty: 1 to 2 gallons
• Hose clamps - Qty: 2

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool fully before starting.
• Place a drain pan under the radiator area.
• Raise the front only if you need more access, and support it with jack stands.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Drain enough coolant

• Use the drain pan under the radiator drain area.
• Open the radiator cap only when the engine is cold.
• Drain coolant until the hose ends are below the coolant level, or drain most of the system if needed for access.
• Keep pets away from spilled coolant.

Step 2: Remove the old hose

• Use hose clamp pliers or pliers to move the spring clamps away from both ends of the hose.
• If the hose is stuck, use a flat-blade screwdriver to gently break the seal at the neck.
• Twist the hose back and forth, then pull it off the radiator and engine fitting.
• Inspect both hose necks for corrosion, cracks, or damage.

Step 3: Install the new hose

• Compare the new hose to the old one to confirm the shape and length match.
• Slide the clamps onto the hose before pushing it into place.
• Push the hose fully onto each fitting until it seats against the stop.
• Position the clamps over the hose beads and release them with the hose clamp pliers.
• Make sure the clamps sit behind the raised bead.

Step 4: Refill the cooling system

• Use a funnel to fill the radiator with the correct coolant mix.
• Fill the overflow reservoir to the proper mark.
• Leave the radiator cap off for initial bleeding if needed.

Step 5: Bleed air from the system

• Start the engine and let it idle.
• Turn the heater to HOT and the blower on low.
• Watch coolant level as air escapes and add coolant as needed.
• Once warm and stable, install the radiator cap.
• Top off only when the engine is cool.

Step 6: Check for leaks

• Inspect both hose ends, the clamps, and the radiator neck for seepage.
• Let the engine reach operating temperature and check again.
• Shut the engine off and recheck coolant level after it cools.

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✅ After Repair

• Drive the truck and watch the temperature gauge.
• Recheck coolant level after the first heat cycle.
• Inspect for dried coolant residue around the new hose and clamps.

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💰 DIY vs Shop Cost

Shop Cost: $180-$380 (parts + labor)

DIY Cost: $35-$90 (parts only)

You Save: $145-$290 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-2 hours.

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🎯 Ready to get started?

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