🔧 Yukon - Front Turn Signal Bulb Replacement

Your Yukon’s front turn signal bulbs sit inside the headlamp assemblies. Replacement is done from under the hood by removing the bulb socket, swapping the bulb, and testing the signals to make sure everything works normally.

Difficulty Level: Beginner | Estimated Time: 0.3-0.7 hours

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⚠️ Safety & Precautions

• ⚠️ Turn the ignition OFF, remove the key, and switch all lights OFF before starting.
• ⚠️ Let the headlamp area cool if lights were recently on.
• ⚠️ Don’t force plastic parts—cold plastic cracks easily.
• ⚠️ 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
• Trim clip removal tool
• 10mm socket
• 1/4" ratchet
• 6" socket extension
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front turn signal bulb (amber, 7444NA-type) - Replace in pairs - Qty: 2
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Open the hood and support it securely.
• Tip: Gloves help keep oils off the bulb.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Make room behind the headlamp (if needed)

• Use a flashlight to look behind the headlamp you’re working on.
• If your hand space is tight, remove nearby intake/cover pieces:
• Use a trim clip removal tool to lift any plastic push-pins (a push-pin is a 2-piece clip that “pops” out when you pry the center up).
• If a small bracket or duct is held with bolts, use a 10mm socket, 1/4" ratchet, and 6" socket extension to remove the fasteners and move the piece aside.

Step 2: Locate the front turn signal bulb socket

• From behind the headlamp, find the socket that matches the turn/park lamp (typically an amber bulb socket on the back of the headlamp).
• Use a flashlight and follow the wiring to the socket.

Step 3: Remove the bulb socket

• Grip the socket firmly by hand.
• Rotate the socket counterclockwise about a quarter turn, then pull it straight out of the headlamp.
• Tip: Wiggle gently—don’t pry on the lens.

Step 4: Replace the bulb

• Pull the old bulb straight out of the socket (it’s a “wedge” style bulb, meaning it’s held by friction, not threads).
• Push the new 7444NA-type amber bulb straight into the socket until fully seated.
• Apply a very light smear of dielectric grease to the socket seal if it looks dry (dielectric grease helps keep moisture out).

Step 5: Reinstall the socket

• Insert the socket back into the headlamp housing.
• Rotate the socket clockwise until it locks.

Step 6: Reassemble any parts you moved

• Reinstall any ducts/brackets you removed using a 10mm socket, 1/4" ratchet, and 6" socket extension.
• Reinstall push-pins using the trim clip removal tool (press the body in, then press the center pin to lock).

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✅ After Repair

• Turn the ignition ON and test: left signal, right signal, hazards, and parking lights.
• If the turn signal “fast flashes,” one bulb may be out or not seated—recheck the bulb fit and socket lock.
• Make sure both sides match in color and brightness.

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💰 DIY vs Shop Cost

Shop Cost: $60-$150 (parts + labor)

DIY Cost: $10-$35 (parts only)

You Save: $50-$115 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.3-0.7 hours.

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🎯 Ready to get started?

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