SKU:KNN81-0812
K&N Engineering
K&N Oil Separator Catch Can - 6.6L | 2020-2025 GMC Sierra 3500HD
K&N Oil Separator Catch Can - 6.6L | 2020-2025 GMC Sierra 3500HD
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The K&N Oil Separator Catch Can fits the 2020-2025 GMC Sierra 3500HD 6.6L and captures blowby oil before it reaches the intake tract.
Product Overview
This catch can replaces the factory PCV line from the crankcase with a high-capacity reservoir that traps oil vapor before it fouls the intake.
Trapped oil means cleaner intake valves, less carbon buildup, and no power loss from oil-contaminated air charge.
Factory-style hose connections snap on and off, and the reservoir empties by hand with no tools required.
Features & Specifications
- Fits: 2020-2025 GMC Sierra 3500HD
- Fits 6.6L engine only
- Captures blowby oil to protect intake tract
- High-capacity reservoir, tool-free to empty
- Factory-style snap-on hose connections
- Replaces factory crankcase line
- Vehicle-specific engineered fitment
- No-Hassle Lifetime Limited Warranty
Fitment
This part fits the following vehicles:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2025 | GMC | Sierra 3500 HD | AT4 |
| 2020-2021 | GMC | Sierra 3500 HD | Base |
| 2020-2025 | GMC | Sierra 3500 HD | Denali |
| 2022-2025 | GMC | Sierra 3500 HD | Pro |
| 2020-2025 | GMC | Sierra 3500 HD | SLE |
| 2020-2025 | GMC | Sierra 3500 HD | SLT |
Shipping & Returns
Shipping & Returns
Tracking is typically provided within 3–5 business days; items shipping direct from the manufacturer may take 5–7. Some items are made to order or may be backordered. Questions about stock? Reach us through live chat or email.
Warranty
Warranty
All warranties are through the manufacturer and are facilitated by Stateside Performance. Some manufacturers require the end user to contact them directly; in that case we will point you to the right contact. Email us with any warranty questions.
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Free shipping over $250
Shipping policyFree shipping applies to items that are shipped via ground through UPS or FedEx and are over $250 going to the continental 48 states. This does not apply to Alaska or Hawaii, and does not apply to any item(s) that are shipped via freight or with any other option other than ground shipping.
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30-day returns
Return policyReturns must be requested within 30 days of delivery. Parts must be new, unused, uninstalled, and in original packaging, with an RMA. Some items are final sale.