The Enclave uses two air filters: an engine air filter and a cabin air filter. Each filter has its own part number, and the exact numbers depend on the engine configuration and production date.
To find the precise part numbers for your 2011 Enclave, consult the owner's manual, inspect the filter housings for labels, or search the GM Parts Catalog using your vehicle’s VIN or contact a Buick dealer for confirmation.
Two filters, two part numbers
The following sections explain how to identify the correct part numbers for both the engine and cabin air filters. Using your VIN ensures you get the exact OEM or reputable aftermarket replacement that fits your specific vehicle.
Engine air filter
Use the steps below to locate the exact engine air filter part number for your 2011 Enclave. The number can vary by production date and whether your vehicle uses the 3.6L V6 engine that year.
- Check the owner's manual under the maintenance or filter replacement section for the listed engine air filter part number.
- Open the hood and remove or lift the engine air filter housing lid to look for a stamped or printed GM part number on the filter cover itself or on a label inside the housing.
- Use your Vehicle Identification Number (VIN) to search the GM Parts Catalog or contact a Buick/GMC dealer to confirm the exact replacement part for your VIN.
- If the OEM number is unavailable, consider a reputable aftermarket replacement that matches specifications (filtration efficiency and size) for the 3.6L V6 engine, ensuring proper fitment.
In practice, the engine air filter number is most reliably obtained by VIN-based lookup in the GM Parts Catalog or through a dealership. This ensures compatibility with your specific 2011 Enclave build.
Cabin air filter
Use the steps below to locate the exact cabin air filter part number for your 2011 Enclave. Cabin filters can vary by production date and supplier, and the enclosure location can differ by model year.
- Check the owner's manual for the cabin air filter part number and replacement interval.
- Inspect the cabin filter housing behind the glove box or under the dash for a label or stamped part number on the filter cover.
- Enter your VIN in the GM Parts Catalog or ask a Buick dealer to confirm the correct cabin air filter part for your vehicle.
- If you prefer aftermarket options, choose a filter that matches the cabin air filtration size, efficiency (HEPA-like if specified), and fitment for the 2011 Enclave's HVAC system.
As with the engine filter, the cabin air filter number is best verified via VIN-based catalog search or dealership confirmation to ensure proper fit and filtration performance.
Additional considerations
Replacement intervals can vary by climate and driving conditions. In dusty or urban environments, engines and cabin filters may need more frequent replacement. Always favor OEM GM Genuine Parts or certified aftermarket equivalents that meet OEM specifications to preserve performance and warranty where applicable.
Summary
For a 2011 Buick Enclave, there are two separate air filters: engine and cabin. The exact part numbers depend on engine configuration and production date, so the most reliable method to obtain the correct numbers is to consult the owner's manual, inspect housing labels, or search the GM Parts Catalog using the vehicle’s VIN or by contacting a Buick dealer. When in doubt, request both engine and cabin filter part numbers from a dealer to ensure accurate replacements and optimal performance.