🔧 Taillight Bulb Replacement - Replacement

This job replaces the rear stop/tail bulbs on both sides of your Sierra. The taillamp housings come off from the outside, so you do not need to remove the bed or trim panels.

Difficulty Level: Beginner | Estimated Time: 0.5-1 hour

---

⚠️ Safety & Precautions

• Turn the lights off and remove the key before starting.
• Let the bulbs cool first if the lamps were just on.
• Do not touch the glass of a new bulb with bare fingers.
• Be gentle with the taillamp housing tabs. They can crack if forced.

---

🔧 Required Tools

You'll need the following tools for this repair:

• 7mm socket
• Ratchet
• Short extension
• Trim tool or plastic panel tool
• Gloves
• Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear tail/stop bulbs - Qty: 2

---

📋 Before You Begin

• Park on level ground and set the parking brake.
• Turn the headlight switch to OFF.
• If the rear lamps were on recently, wait a few minutes so the bulbs cool.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the tailgate

• Lower the tailgate for access to the taillamp mounting screws.

Step 2: Remove the taillamp screws

• Use a 7mm socket with a ratchet and short extension to remove the two screws holding each taillamp housing.
• Keep the screws in a safe place.

Step 3: Release the taillamp housing

• Pull the taillamp housing straight rearward to release the locating pins.
• If it sticks, use a trim tool to gently work it loose.
• Do not pry on the lens edge.

Step 4: Remove the bulb socket

• Twist the rear bulb socket counterclockwise by hand and pull it out of the housing.
• Remove the old bulb from the socket.

Step 5: Install the new bulb

• Install the new bulb into the socket.
• Make sure it seats fully and matches the old bulb style.
• Handle the bulb by the base.

Step 6: Reinstall the socket and housing

• Insert the socket into the taillamp housing and twist clockwise to lock it in place.
• Align the housing pins with the body openings and press it straight in.
• Reinstall the screws with the 7mm socket and tighten to 3 N·m (27 in-lbs).

Step 7: Repeat on the other side

• Repeat the same process for the opposite taillamp.

---

✅ After Repair

• Turn on the parking lights and check both taillights.
• Press the brake pedal and verify both brake lamps work.
• Check the turn signals and hazard lights if those bulbs were part of the rear lamp assembly.
• Make sure the housings sit flush with the body.

---

💰 DIY vs Shop Cost

Shop Cost: $80-$180 (parts + labor)

DIY Cost: $10-$30 (parts only)

You Save: $70-$150 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1 hours.

---

🎯 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.