No, the 2005 Chevy Silverado does not have a factory-installed cabin air filter.
This includes the 1500, 2500, and 3500 models. Even though earlier models like the 1999–2002 Silverados had them, GM eliminated the cabin air filter slot starting around 2003.

Why Doesn’t It Have One?

Chevrolet redesigned the HVAC (heating, ventilation, and air conditioning) system, and in doing so:

• Removed the cabin filter tray
• Molded the access area shut, making it non-serviceable without modification

As a result, there’s no place to install a filter without cutting into the blower housing.

Can You Add One?

❌ Not easily

• Aftermarket retrofit kits exist, but they require:
  • Cutting into the HVAC housing
  • Installing a custom filter slot and bracket

Unless you’re very confident with DIY mods, this isn’t recommended for most drivers.

How to Keep Cabin Air Clean Without a Filter

• Regularly vacuum your vents and dashboard
• Keep the cowl area (below the windshield) clear of leaves and debris
• Replace the blower motor resistor or clean the fan if you notice airflow problems

Final Thoughts

No, the 2005 Chevy Silverado was not equipped with a cabin air filter, and it’s not easily upgradable without modifications.
If you want cleaner cabin air, focus on routine cleaning and maintaining your HVAC components.