K&N Air Oil Separator Catch Can for Silverado/Tahoe/Suburban (2014-2020) — Vehicle‑Specific, Tool‑Free Drain

The K&N Air Oil Separator (81-0805) is a vehicle-specific catch can that captures crankcase oil and blowby vapors to help protect your engine and intake tract on compatible GM trucks and SUVs.

If you own a 2014–2018 Chevrolet Silverado 1500 or GMC Sierra 1500, a 2015–2020 Suburban/Tahoe/Yukon family vehicle, or a 2015–2019 Escalade, this K&N unit replaces the factory crankcase vent line with a high-capacity reservoir and OEM-style connections. Engineered for each application, the separator installs in about 30 minutes with common tools and uses quick-snap fittings so you can check and drain the reservoir without tools. Backed by K&N’s No-Hassle Lifetime Limited Warranty, it’s designed to be a durable add-on to your factory systems (not legal for sale or use in California on pollution-controlled vehicles).

How does the K&N Air Oil Separator protect my engine?

The separator intercepts oil-laden crankcase vapors before they reach the intake tract, collecting the condensate in a dedicated reservoir. Removing oil and contaminants from the PCV stream reduces buildup on intake valves and in the intake manifold, helping maintain consistent airflow and combustion characteristics.

• High-capacity internal reservoir for extended catch intervals
• Separates oil droplets and returns them to the crankcase or stores them for easy draining
• Prevents recycled oil from coating intake components and sensors

Will installation fit my Silverado/Tahoe/Suburban/Yukon/Escalade and how long does it take?

This model is engineered for specific GM 5.3L/6.2L truck and SUV platforms listed in the fitment guide, so it uses factory routing and mounting points where possible. Typical installation takes about 30 minutes using basic hand tools; hose ends use factory-style snap connectors for a clean, secure fit.

• Vehicle-specific kit for listed model years and engines
• OEM-style connectors and durable hoses included
• No special tools required to remove or empty the reservoir

How do I service and drain the catch can?

Servicing is straightforward: the collector is designed for tool-free access so you can inspect and empty it during routine maintenance intervals. Frequency depends on driving conditions and engine use, but visual checks during oil changes will tell you when draining is needed.

• Hand-release reservoir cap for quick emptying
• Clear or accessible reservoir location for easy visual checks
• Designed to be emptied without removing the entire unit

What materials and features ensure long-term durability?

The K&N catch can uses premium components and OEM-style connectors to withstand heat and vibration in modern engine bays. The design prioritizes flow efficiency and leak-free connections while matching factory vent routing to reduce installation complexity.

• Robust hoses and fittings built to factory fitment specifications
• High-capacity, corrosion-resistant collection housing
• Backed by K&N No-Hassle Lifetime Limited Warranty

Who is this for: drivers of compatible Chevrolet, GMC, and Cadillac full-size trucks and SUVs who want an engineered, vehicle-specific solution to reduce oil and contaminant recycle into the intake system. If you perform regular towing, heavy-load driving, or want to limit intake and valve deposits for longevity and consistent performance, the K&N 81-0805 Air Oil Separator is a direct-fit aftermarket accessory that integrates with factory systems and is easy to service during routine maintenance.