SKU:KNN81-0812
K&N Engineering
K&N Oil Separator Catch Can - 6.6L | 2020-2025 GMC Sierra 2500HD
K&N Oil Separator Catch Can - 6.6L | 2020-2025 GMC Sierra 2500HD
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The K&N Oil Separator Catch Can fits the 2020-2025 GMC Sierra 2500HD 6.6L Duramax and captures blowby oil before it reaches the intake tract.
Product Overview
This catch can replaces the factory PCV line from the crank case and routes vapor through a high-capacity reservoir that traps oil.
Keeping oil out of the intake helps prevent carbon buildup, power loss, and long-term engine damage on the 6.6L Duramax.
Factory-style snap-on hose connections mean no cutting, and the reservoir empties without tools.
Features & Specifications
- Fits: 2020-2025 GMC Sierra 2500HD
- Fits 6.6L Duramax only
- Replaces factory crank case line
- High-capacity oil reservoir
- Factory-style snap-on hose connections
- Tool-free reservoir check and drain
- Vehicle-specific engineered fitment
- Installs in about 30 minutes with basic tools
- Backed by K&N No-Hassle Lifetime Limited Warranty
Fitment
This part fits the following vehicles:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2025 | GMC | Sierra 2500 HD | AT4 |
| 2024-2025 | GMC | Sierra 2500 HD | AT4X |
| 2020-2021 | GMC | Sierra 2500 HD | Base |
| 2020-2025 | GMC | Sierra 2500 HD | Denali |
| 2022-2025 | GMC | Sierra 2500 HD | Pro |
| 2020-2025 | GMC | Sierra 2500 HD | SLE |
| 2020-2025 | GMC | Sierra 2500 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.