🔧 Colorado - Taillight Bulb Replacement

On your Colorado, the taillight bulbs sit inside each rear lamp assembly. The job is mostly removing the taillight housing, swapping the bulbs, and reinstalling everything so the lamp seals against water.

Difficulty Level: Beginner | Estimated Time: 0.5-1.0 hours

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⚠️ Safety & Precautions

• ⚠️ Turn the light switch OFF and remove the key before starting.
• ⚠️ Let bulbs cool before touching; they can get very hot.
• ⚠️ Wear gloves to avoid cutting your hands on sharp sheet metal edges.
• ⚠️ Do not force the lamp housing—broken alignment pins can cause water leaks.

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🔧 Required Tools

You'll need the following tools for this repair:

• Torx T15 screwdriver
• Trim clip removal tool
• Small flat-blade screwdriver
• Flashlight
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Taillight bulbs - Replace in pairs - Qty: 2
• Turn signal bulbs - Replace in pairs - Qty: 2
• Reverse light bulbs - Replace in pairs - Qty: 2
• Brake/stop light bulbs - Replace in pairs - Qty: 2

Assumption: you want the two rear lamp bulbs on both sides; your lamp may use multiple bulb types. Match the bulb to the socket you remove.

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📋 Before You Begin

• Park on level ground, set the parking brake, and open the tailgate.
• Set the headlight switch to OFF.
• Have a clean rag ready so you don’t set the taillight lens on dirt.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the taillight housing screws

• Open the tailgate to access the inboard edge of the taillight.
• Use a Torx T15 screwdriver to remove the two screws along the inside edge of the taillight.
• Put the screws somewhere safe so they don’t fall into the bumper.

Step 2: Pull the taillight housing straight back

• Grip the housing with both hands and pull it straight rearward (toward you).
• If it feels stuck, use a trim clip removal tool to gently help it release at the outer edge.
• Pull straight back—don’t pry the lens.
• Once free, support the lamp so it doesn’t hang by the wiring.

Step 3: Remove the bulb socket you’re replacing

• Look at the back of the housing and find the socket for the bulb you want to change.
• Twist the socket counterclockwise about 1/4 turn by hand and pull it out.
• If it’s tight, use a small flat-blade screwdriver gently to help start the twist (don’t crack the plastic).
• A “socket” is the plastic holder the bulb locks into.

Step 4: Swap the bulb

• Pull the old bulb straight out of the socket.
• Push the new bulb straight in until fully seated.
• Wear nitrile gloves to keep oils off the glass (helps bulb life).

Step 5: Reinstall the socket and test

• Insert the socket back into the housing and twist clockwise to lock.
• Turn the key to ON and test the function you changed (tail, brake, turn, or reverse).
• Use a flashlight to confirm the bulb is lit and seated evenly.

Step 6: Reinstall the taillight housing

• Line up the housing alignment pins with the body holes and press the housing straight forward into place.
• Reinstall the two screws using a Torx T15 screwdriver.
• Snug them down by hand—do not over-tighten (plastic can crack).

Step 7: Repeat on the other side

• Do the same steps on the other taillight so both sides match brightness and color.

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✅ After Repair

• Test all rear lights: parking lights, brake lights, turn signals, hazards, and reverse lights.
• Check that the taillight sits flush against the body (helps prevent water leaks).
• If a bulb doesn’t work, remove the socket and reseat the bulb, then retest.

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💰 DIY vs Shop Cost

Shop Cost: $80-$200 (parts + labor)

DIY Cost: $10-$60 (parts only)

You Save: $70-$140 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 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.