Doc's Diesel Cabin Air Filter for Chevrolet/GMC 2020–2025 Duramax 6.6L 2500HD/3500HD & 3.0L — D3932C Electrostatic, Replaces 13508

If you drive a 2020 or newer Chevrolet or GMC with the 6.6L or 3.0L Duramax engine, the cabin air filter is the small component that keeps dust, pollen and airborne debris from circulating inside your truck. Doc's Diesel designed the D3932C as a precise-fit aftermarket replacement that installs in the factory location (usually behind the glove box) without voiding warranty when installed according to manufacturer instructions.

How does this filter improve the air inside my truck?

The D3932C uses electrostatic filter media that captures a wide range of particles, including fine dust and pollen, helping the HVAC system deliver cleaner air to the cabin. Third-party testing shows the media stops particles down to 0.001 microns, so it traps much smaller contaminants than basic paper filters.

• Electrostatic media captures microscopic particles efficiently
• Removes common road dust, pollen and airborne debris
• Improves overall HVAC airflow by fitting to OEM tolerances

Will this fit my Chevrolet/GMC Duramax 2500HD, 3500HD or 3.0L vehicle?

The D3932C is manufactured for a direct replacement fit on Chevrolet and GMC trucks equipped with the 6.6L Duramax (2500HD, 3500HD) and the 3.0L Duramax for model years 2020 through 2025. It follows factory dimensions so no trimming or modification is required for proper installation.

• Compatible with 2020–2025 Chevrolet/GMC 6.6L Duramax 2500HD and 3500HD
• Compatible with 2020–2025 Chevrolet/GMC 3.0L Duramax
• Direct-fit design installs in the OEM glove-box/ HVAC housing location

Which original part numbers does this replace and how does it compare?

Doc's Diesel D3932C is cross-referenced to common OEM and aftermarket part numbers for easy purchasing and service. It replaces GM part 13508023 and several popular aftermarket cabin filters, offering comparable or improved filtration performance thanks to its electrostatic media.

• Replaces GM 13508023 for direct interchangeability
• Interchanges with AC/Delco CF185, CF1184C and aftermarket equivalents
• Suitable substitute for Baldwin PA10369, Premium Guard PC4211C and Purolator TC3822AC

How often should I change the D3932C and is installation difficult?

Cabin air filters should be replaced according to your vehicle manufacturer's recommendations or sooner in dusty conditions. Doc's Diesel suggests a general guideline of every 15,000 miles or every 12 months, whichever comes first, but check your owner’s manual for warranty-related intervals. Installation is simple for most owners—typically accessed behind the glove box without special tools.

• Recommended replacement every 12 months or 15,000 miles as a guideline
• Easy access—usually located behind the glove compartment on GM trucks
• No special tools required for standard replacement procedures

Who is this for? The Doc's Diesel D3932C is aimed at Chevrolet and GMC owners who want a reliable, higher-performance cabin air filter that fits factory housings on 2020–2025 Duramax-powered trucks. Whether you maintain your own vehicle or run a service shop, this filter is a direct-fit option for drivers seeking improved in-cabin filtration compared with standard paper replacements. Replace it as part of routine HVAC maintenance to preserve air quality and maintain comfortable cabin conditions without complex installation steps.