2020–2024 Cadillac CT4-V
By Tom Becker ✓ Certified Mechanic · Published Sep 24, 2026 · Updated Oct 14, 2026
Save $79 by doing it yourself! Shop cost: $103
Quick answer: Cabin Air Filter Replacement on a 2020–2024 Cadillac CT4-V is rated Easy and takes about 15–20 minutes. You'll need 1 tool for this job, and parts cost about $24. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Cabin air filter | — | $24.00 |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Empty the glove box completely and slide the passenger seat back. The CT4-V shares the standard CT4's cabin-filter housing — the filter sits in the HVAC housing behind the glove box. Confirm the replacement is cataloged for the 2020-2024 CT4.
Squeeze the glove box sides inward to clear the stop bumpers and let the box swing down. Unhook the damper arm from its pin on the right, noting its orientation — a snapped damper is a common casualty.
Release the tabs on the filter cover — they squeeze inward or pry outward. Pull the cover off and set it aside clear of the blower opening. Fish out any tab that falls in before it reaches the fan.
I never skip this: Watch those little cover tabs — drop one into the housing and it'll find the blower fan, and you'll know it the second you turn the fan on. Fish out anything that falls before you reassemble.
Slide the old filter straight out, keeping it level and noting the airflow arrow. A clogged filter is a common cause of weak A/C airflow. Vacuum debris from the slot and wipe the edges — grit in the slot ends up on the blower.
Slide the new filter in with its airflow arrow matching the original orientation. It should seat fully with gentle pressure — don't fold or force it, and confirm it lies flat. A half-seated filter whistles at high speed.
Snap the cover back on, lift the glove box past its stops, and reattach the damper arm. Start the CT4-V, fan on high, fresh air — strong, quiet airflow, no rattling. Cycle low to high; airflow builds smoothly.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
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