KAX HEPA Cabin Air Filter CF11809 for Chevrolet GMC Cadillac — OEM Fit, HEPA + Carbon Odor Reduction

The KAX CF11809 is a premium HEPA cabin air filter engineered to fit select Chevrolet, GMC and Cadillac models while capturing ultrafine particles and reducing odors for cleaner in-cabin air.

Designed as a direct replacement for factory filters, the KAX ProSeries CF11809 combines a true HEPA-grade media with a dual-layer carbon matrix and optimized pleat layout. Its dimensions match OEM specifications so it installs behind the glove box without tools, and the component is sized to preserve airflow while improving filtration efficiency.

Which vehicles will this filter fit?

This KAX cabin air filter is produced to match exact OEM dimensions for a number of GM full-size trucks and SUVs. It fits model years and trims across Chevrolet, GMC and Cadillac lineup where the CF11809 configuration is specified.

• Chevrolet: Silverado 1500 (2014–2018), Suburban/Tahoe (2015–2020), Silverado HD series (2015–2022), and select 2019 models.
• GMC: Sierra 1500/2500/3500 and Yukon/Yukon XL models in the compatible year ranges (2014–2020).
• Cadillac: Escalade and Escalade ESV for 2014–2020 years where CF11809 applies.

How does the KAX CF11809 improve cabin air compared to standard filters?

The CF11809 uses a HEPA-compliant media layer plus a high-capacity activated carbon matrix to capture ultrafine particulates and adsorb odors. Independent testing shows enhanced particle capture performance relative to basic OEM parts, and the carbon layer helps reduce common cabin smells from traffic and road sources.

• True HEPA-grade layer captures 0.1–0.3 μm particles effectively.
• Dual-layer carbon matrix reduces volatile odors and contaminants.
• Engineered to outperform standard OEM filters by a measurable margin in particle capture.

Will this filter affect airflow or HVAC performance?

KAX optimized the pleat pattern and media density to lower airflow resistance while maintaining filtration efficiency. The design reduces pressure drop compared with denser aftermarket options, helping the vehicle’s HVAC system maintain strong airflow and avoid extra strain.

• Optimized pleat geometry reduces airflow resistance by roughly 15% vs. denser designs.
• Maintains effective cooling and heating airflow for consistent cabin comfort.
• Balanced performance helps avoid unnecessary fan load and energy use.

How simple is the installation and what are the filter specs?

The CF11809 is built to OEM size standards for a tool-free install behind the glove box; most users complete the swap in under five minutes. It is a disposable, non-washable single-piece filter supplied in a protective box.

• Location: behind glove box; installation typically tool-free and fast.
• Dimensions: 9.8" length × 9.2" width × 1.2" height; rectangular shape.
• Care: not washable or reusable; single filter per package.

Who this filter is for: Drivers of compatible Chevrolet, GMC and Cadillac trucks and SUVs who want higher-efficiency cabin filtration, reduced in-cabin odors, and an easy OEM-fit replacement. It's suitable for owners seeking better protection from dust, pollen, road particulates and common odors without sacrificing HVAC airflow or requiring extra installation time.