🔧 Blazer - Cabin Air Filter Replacement

Your Blazer’s cabin air filter cleans the air entering the HVAC system (heat/AC). Replacing it helps airflow and reduces dust, pollen, and musty odors inside the cabin.

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

---

⚠️ Safety & Precautions

• 🧤 Work with the ignition OFF and key away from the vehicle.
• 🛑 Do not force the glove box—plastic tabs can crack if bent too far.
• ⚠️ Avoid using tools near the passenger airbag area; this job is behind the glove box and uses mostly clips.
• 🔋 Battery disconnect is not required for this procedure.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Trim removal tool (plastic)
• Flashlight
• Clean shop towel

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Cabin air filter - Qty: 1

---

📋 Before You Begin

• Park on level ground and shift to Park.
• Turn the ignition OFF and remove any items from the glove box.
• Move the passenger seat back for working room.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open and empty the glove box

• Open the glove box fully and remove everything inside.
• Use a flashlight to look at the right side of the glove box for a small “damper” arm (a little strut that slows the door). It prevents the door from slamming.

Step 2: Release the glove box damper (if equipped)

• If you see a small arm on the right side, gently unclip it from the glove box using a trim removal tool (plastic).
• Set the arm aside without bending it.

Step 3: Drop the glove box down

• Push inward on both sides of the glove box to clear the built-in “stops” (the little tabs that prevent it from falling).
• Once the stops clear, let the glove box rotate downward slowly.
• Use a clean shop towel to protect trim if anything rubs.

Step 4: Remove the cabin filter access cover

• Behind the dropped glove box, locate the cabin filter cover (a rectangular plastic panel).
• Release the cover’s locking tabs by hand; if tight, gently help the tab with the trim removal tool (plastic).
• Remove the cover and set it aside.

Step 5: Remove the old cabin air filter

• Pull the filter straight out.
• Keep it level as you remove it to avoid dumping debris.
• Use the flashlight to check for leaves or debris inside the filter housing.

Step 6: Install the new cabin air filter

• Check the airflow arrow on the filter frame and match it to the airflow direction marked on the HVAC housing (or match the orientation of the old filter).
• Slide the new filter in carefully so it doesn’t fold or crease.
• A bent filter can whistle and reduce airflow.

Step 7: Reinstall the cover and glove box

• Reinstall the cabin filter cover and press until the tabs click in.
• Lift the glove box back up and push the sides inward again so the stops pass back into place.
• Reconnect the glove box damper (if you removed it) by snapping it back on by hand.

---

✅ After Repair

• Start your Blazer and run the fan on medium-high for 30 seconds to confirm strong airflow.
• Listen for rattles or clicking at the glove box area; if you hear it, recheck the filter cover tabs.
• If your HVAC has an odor, consider replacing the filter again sooner and checking for leaves at the cowl area.

---

💰 DIY vs Shop Cost

Shop Cost: $80-$160 (parts + labor)

DIY Cost: $15-$45 (parts only)

You Save: $65-$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.

---

🎯 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.