K&N 81-0804 Air-Oil Separator for 2019-24 Chevy Silverado/Sierra 1500

Vehicle Fitment

• 2019-2024 Chevrolet Silverado 1500 (Crew/Double/Regular Cab) 5.3 L/6.2 L V8, RWD/4WD
• 2021-2024 Chevrolet Tahoe/Suburban 5.3 L/6.2 L V8, RWD/4WD
• 2019-2024 GMC Sierra 1500 5.3 L/6.2 L V8, RWD/4WD
• 2020-2023 Cadillac Escalade / Escalade ESV 6.2 L V8, RWD/4WD

Features

• Captures crankcase blow-by oil vapors before they enter the intake tract
• Protects engine internals and helps prevent power loss associated with oil contamination
• Large 6 oz (≈0.18 L) capacity reservoir for extended service intervals
• Direct-fit design engineered specifically for the listed vehicle applications (no universal kit)
• Quick installation - approximately 30 minutes using factory-style hose connections
• Durable aluminum tank with black finish and premium hose connections for longevity
• Backed by a lifetime limited warranty when used as directed
• Helps maintain cleaner intake manifold and throttle body surfaces, especially under towing or heavy load conditions

Specifications

• Reservoir capacity: 6 oz (≈0.18 L)
• Tank material: Aluminum, black finish
• Approximate weight: 2 lb (0.9 kg) per unit
• Mounts via factory PCV/hose routing - no drilling required
• Street legal in all US states except California (Not legal for sale or use in California on a pollution-controlled motor vehicle)

Included Components

• 1x Oil-Separator reservoir assembly
• 2x Hose clamps
• OEM-style hose fittings and pre-installed hoses
• Installation instructions and hardware kit

Product Description

The K&N 81-0804 Air-Oil Separator is designed for heavy duty and performance gasoline V8 engines in the Chevrolet, GMC and Cadillac full-size trucks and SUVs listed above. By capturing crankcase blow-by vapors and preventing oil-laden gases from re-entering the intake manifold, this unit helps protect components like valves, intercoolers (if applicable) and intake tract surfaces - particularly important under heavy loads, towing, or performance driving conditions.

Engineered with a direct-fit design, this separator drops into place using factory hose connections without requiring custom fabrication. The generous 6-ounce reservoir helps reduce maintenance frequency, and the durable aluminum construction is built to last in severe service environments. It's an ideal upgrade for owners who push their vehicle with heavier loads, frequent highway towing or performance modifications.

Please note: Fitment is confirmed through 2024 for the listed vehicles. 2025 coverage is unconfirmed at time of listing. Also note: this product is **not legal in California** for sale or use on any pollution-controlled motor vehicle. Always verify your exact URL, cab style and engine (5.3 L or 6.2 L V8) and drivetrain (RWD/4WD) before purchase.