🔧 Radiator Hose - Replacement

On your Silverado, the radiator hoses carry coolant between the radiator and the engine. Replacing a leaking, swollen, or soft hose helps prevent overheating and coolant loss.

Difficulty Level: Beginner | Estimated Time: 1.0-2.0 hours

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⚠️ Safety & Precautions

• ⚠️ Only work on the cooling system when the engine is fully cold to avoid burns from hot coolant/steam.
• ⚠️ Support the truck with jack stands if you raise it—never rely on a jack alone.
• ⚠️ Keep coolant off belts and electrical connectors; clean spills immediately.
• ⚠️ Dispose of old coolant properly—coolant is toxic to people and pets.
• Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Drain pan (at least 3-gallon)
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Slip-joint pliers
• Hose clamp pliers (specialty)
• Pick tool set
• Flathead screwdriver
• Razor blade scraper
• Shop rags
• Funnel
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Upper radiator hose - Qty: 1
• Lower radiator hose - Qty: 1
• Radiator hose clamps - Qty: 2-4
• DEX-COOL coolant (50/50 premix) - Qty: 2-3 gallons

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Let the engine cool completely (best: sit overnight).
• Set your HVAC to heat later during bleeding (you’ll do this after refill).
• Place a drain pan under the radiator drain area before loosening anything.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve pressure (cold engine only)

• Put on safety glasses and nitrile gloves.
• Slowly loosen the coolant reservoir cap by hand to relieve any leftover pressure, then remove it.

Step 2: Drain enough coolant to get below the hose level

• Position the drain pan under the radiator.
• Open the radiator drain (petcock) carefully (use a flathead screwdriver only if needed).
• Drain until the coolant level is below the hose you’re replacing (upper = less drain, lower = more drain).
• Close the drain snugly by hand when done (do not overtighten).

Step 3: Remove the engine cover/air ducting if it blocks access

• Use a flathead screwdriver to loosen any intake duct clamps that block the upper hose area, then move the duct aside.
• Take a quick photo first for reassembly.

Step 4: Remove the old hose clamps

• Most Silverado radiator hoses use spring clamps.
• Use hose clamp pliers (specialty) to squeeze the clamp ears and slide the clamp back on the hose.
• (Tool tip) Hose clamp pliers are made to hold spring clamps open so your hands aren’t fighting the clamp.

Step 5: Remove the old radiator hose

• Twist the hose to break it loose first (use slip-joint pliers gently if needed).
• If the hose is stuck, slide a pick tool under the hose end to break the seal, then pull the hose off.
• Catch any remaining coolant with the drain pan and shop rags.
• Do not pry hard against the radiator neck—plastic necks can crack.

Step 6: Clean the sealing surfaces

• Use a shop rag to wipe the radiator neck and engine/thermostat outlet clean.
• If there is stuck rubber, gently clean it with a razor blade scraper (light pressure only).

Step 7: Install the new radiator hose

• Compare the new hose to the old hose (same length/bends).
• Slide new clamps onto the hose before installing (use hose clamp pliers (specialty)).
• Push the hose fully onto each fitting until it bottoms out.
• Position the clamps behind the bead/lip on the fitting, then release using hose clamp pliers (specialty).
• Clamp should sit straight, not crooked.

Step 8: Reinstall any ducts/covers you moved

• Reinstall the intake ducting and tighten the clamps with a flathead screwdriver.

Step 9: Refill coolant

• Insert a funnel into the coolant reservoir.
• Add DEX-COOL coolant (50/50 premix) until it reaches the “FULL COLD” line.

Step 10: Bleed air and confirm circulation

• Start the engine and let it idle.
• Set the HVAC to heat, fan medium (this helps move coolant through the heater core).
• Watch the temperature gauge and check for leaks with a flashlight.
• As the engine warms up, the coolant level may drop—top off to the proper line using the funnel.
• Once warm, carefully feel for the hose getting hot (circulation). Keep hands clear of the fan and belts.

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✅ After Repair

• Check for leaks at both hose ends with the engine running and after shut-down.
• Let the truck cool completely, then recheck the reservoir level and top off to “FULL COLD.”
• Over the next 2-3 drives, recheck level each morning (cold) and inspect for dried coolant residue.

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💰 DIY vs Shop Cost

Shop Cost: $250-$500 (parts + labor)

DIY Cost: $60-$160 (parts only)

You Save: $190-$340 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-2.0 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.