Protec 368 Engine Air Filter
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Protec

Protec 368 Engine Air Filter

Brand Protec 368
Class B
Duty Type Ld
Height 7.830
Inner Diameter Bottom 3.325
Inner Diameter Top Closed
Media Material Cellulose
Outer Diameter Bottom 5.980
Outer Diameter Top 5.980
Style Air filter
Fits Buick, Chevrolet, GMC, Isuzu, Oldsmobile, Saab, and Saturn · 89 vehicles

OE-style media area. Matches the original equipment standard for fit and filtration capacity.

Cellulose media. Provides dependable engine protection for everyday driving conditions.

ISO 5011 tested. Laboratory-tested to 97.5% minimum efficiency.

Cross-references ACDelco A2014C, ACDelco A2014CF and ACDelco A2414C for the same application. See all 57.

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Not what you need? See all Engine Air Filter options

Protec 368 Engine Air Filter for Select GM SUVs

The Protec 368 engine air filter is built for everyday driving and routine service intervals. It uses cellulose filter media and is sized to match the original equipment air filter footprint for select Chevrolet, GMC, Saab, Isuzu, Buick, Saturn, and Oldsmobile applications.

For drivers searching for a replacement air filter for a 2002-2009 Chevrolet Trailblazer, 2002-2009 GMC Envoy, or 2005-2009 Saab 9-7x, this filter provides a direct-fit service option. The Protec 368 is also listed for the Chevrolet Trailblazer EXT, GMC Envoy XL, GMC Envoy XUV, Isuzu Ascender, Buick Rainier, Saturn Ion, Oldsmobile Bravada, and Chevrolet Blazer.

Key Features

  • Engine air filter for light-duty passenger vehicle applications
  • Cellulose media for standard intake filtration
  • Designed to match OES media area
  • Laboratory tested to ISO 5011 standards
  • Listed efficiency rating of 97.5% minimum based on PRO-TEC 362 testing
  • Protec part number 368

Detailed Description

Protec 368 is an engine air filter designed to help maintain clean intake airflow during normal driving conditions. The filter uses cellulose media and follows an OE-style form factor with a 7.830-inch height, 5.980-inch outer diameter at both ends, and a closed top. It is built for routine replacement service on vehicles that use this filter shape and size, including the Chevrolet Trailblazer, GMC Envoy, and Saab 9-7x. This part number 368 is a practical choice when replacing a worn air filter on compatible GM and related platforms.

This part cross-references Wix 42729 for the same application.

What It Helps Address

  • Restricted airflow from a dirty or clogged engine air filter
  • Dust and debris entering the intake system
  • Reduced filtration performance during normal service intervals
  • Maintenance needs on select Chevrolet Trailblazer and GMC Envoy models
  • Routine replacement for Saab 9-7x, Isuzu Ascender, and Buick Rainier applications

Installation Notes and Tips

Verify the filter dimensions and housing style before installation. Confirm the vehicle application against the fitment list for your exact year and model, especially on Chevrolet Trailblazer EXT, GMC Envoy XL, and GMC Envoy XUV variants. Replace the filter at regular service intervals or sooner if the element is visibly dirty.

Quality Assurance

Protec states that this air filter line is tested to ISO 5011 standards and is designed to provide engine protection for everyday driving conditions throughout a traditional air filter change interval. The manufacturer also notes a minimum 97.5% efficiency rating based on PRO-TEC 362 testing.

Fitment

  • Fits 2002-2009 Chevrolet Trailblazer, N/A
  • Fits 2002-2006 Chevrolet Trailblazer EXT, N/A
  • Fits 2002 Chevrolet Blazer, N/A
  • Fits 2002-2009 GMC Envoy, N/A
  • Fits 2002-2006 GMC Envoy XL, N/A
  • Fits 2004-2005 GMC Envoy XUV, N/A
  • Fits 2005-2009 Saab 9-7x, N/A
  • Fits 2003-2008 Isuzu Ascender, N/A
  • Fits 2004-2007 Buick Rainier, N/A
  • Fits 2004-2007 Saturn Ion, N/A
  • Fits 2002-2004 Oldsmobile Bravada, N/A

Related reading

This part fits 89 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersNotes
2009ChevroletTrailblazer—6.0LV8—
2009ChevroletTrailblazer—4.2LL6—
2009ChevroletTrailblazer—5.3LV8—
2009GMCEnvoy—4.2LL6—
2009GMCEnvoy—5.3LV8—
2009Saab9-7x—6.0LV8—
2009Saab9-7x—4.2LL6—
2009Saab9-7x—5.3LV8—
2008ChevroletTrailblazer—6.0LV8—
2008ChevroletTrailblazer—4.2LL6—
2008ChevroletTrailblazer—5.3LV8—
2008GMCEnvoy—4.2LL6—
2008GMCEnvoy—5.3LV8—
2008IsuzuAscender—4.2LL6—
2008Saab9-7x—6.0LV8—
2008Saab9-7x—4.2LL6—
2008Saab9-7x—5.3LV8—
2007BuickRainier—4.2LL6—
2007BuickRainier—5.3LV8—
2007ChevroletTrailblazer—6.0LV8—
2007ChevroletTrailblazer—4.2LL6—
2007ChevroletTrailblazer—5.3LV8—
2007GMCEnvoy—4.2LL6—
2007GMCEnvoy—5.3LV8—
2007IsuzuAscender—4.2LL6—
2007Saab9-7x—4.2LL6—
2007Saab9-7x—5.3LV8—
2007SaturnIonRed Line2.0LL4—
2006BuickRainier—4.2LL6—
2006BuickRainier—5.3LV8—
2006ChevroletTrailblazer—6.0LV8—
2006ChevroletTrailblazer—4.2LL6—
2006ChevroletTrailblazer—5.3LV8—
2006ChevroletTrailblazer EXT—4.2LL6—
2006ChevroletTrailblazer EXT—5.3LV8—
2006GMCEnvoy—4.2LL6—
2006GMCEnvoy—5.3LV8—
2006GMCEnvoy XL—4.2LL6—
2006GMCEnvoy XL—5.3LV8—
2006IsuzuAscender—4.2LL6—
2006IsuzuAscender—5.3LV8—
2006Saab9-7x—4.2LL6—
2006Saab9-7x—5.3LV8—
2006SaturnIonRed Line2.0LL4—
2005BuickRainier—4.2LL6—
2005BuickRainier—5.3LV8—
2005ChevroletTrailblazer—4.2LL6—
2005ChevroletTrailblazer EXT—4.2LL6—
2005ChevroletTrailblazer EXT—5.3LV8—
2005GMCEnvoy—4.2LL6—
2005GMCEnvoy—5.3LV8—
2005GMCEnvoy XL—4.2LL6—
2005GMCEnvoy XL—5.3LV8—
2005GMCEnvoy XUV—4.2LL6—
2005GMCEnvoy XUV—5.3LV8—
2005IsuzuAscender—4.2LL6—
2005IsuzuAscender—5.3LV8—
2005Saab9-7x—4.2LL6—
2005Saab9-7x—5.3LV8—
2005SaturnIonRed Line2.0LL4—
2004BuickRainier—4.2LL6—
2004BuickRainier—5.3LV8—
2004ChevroletTrailblazer—4.2LL6—
2004ChevroletTrailblazer EXT—4.2LL6—
2004ChevroletTrailblazer EXT—5.3LV8—
2004GMCEnvoy—4.2LL6—
2004GMCEnvoy XL—4.2LL6—
2004GMCEnvoy XL—5.3LV8—
2004GMCEnvoy XUV—4.2LL6—
2004GMCEnvoy XUV—5.3LV8—
2004IsuzuAscender—4.2LL6—
2004IsuzuAscender—5.3LV8—
2004OldsmobileBravada—4.2LL6—
2004SaturnIon—2.0LL4—
2003ChevroletTrailblazer—4.2LL6—
2003ChevroletTrailblazer EXT—4.2LL6—
2003ChevroletTrailblazer EXT—5.3LV8—
2003GMCEnvoy—4.2LL6—
2003GMCEnvoy XL—4.2LL6—
2003GMCEnvoy XL—5.3LV8—
2003IsuzuAscender—4.2LL6—
2003IsuzuAscender—5.3LV8—
2003OldsmobileBravada—4.2LL6—
2002ChevroletBlazer—4.2LL6—
2002ChevroletTrailblazer—4.2LL6—
2002ChevroletTrailblazer EXT—4.2LL6—
2002GMCEnvoy—4.2LL6—
2002GMCEnvoy XL—4.2LL6—
2002OldsmobileBravada—4.2LL6—
Directly replaces or cross-references 57 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — A2014CACDelco — A2014CFACDelco — A2414CAuto Extra — 619-42729Auto Pride Filters — CFA1135APAutopart International — 5000202740CARQUEST Premium Filters — 87729CARQUEST Standard — BA5433CARQUEST Standard — R87729Casite Filters — CFA1135Champion Filters — CAC9345Driveworks — DW35433Federated — AF1135FFirestone Ride-Rite — AF2014FRAM — CA9345FRAM — TGA9345Gonher — GA414RGroup 7 — VA5433Hastings — AF1135Heritage — HA35433MicroGard — GA35433MicroGard — MGA9345MicroGard — MGA42729Mighty Distributing System — A2014Mileguard — MA9345Mileguard — TGA9345NAPA Gold Filters — 2729NAPA ProSelect Filters — 22729NAPA Silver Filters — 32729Parts Master — 62729Parts Plus — AF2014Pennzoil — PZA269Pentius — PAB9345Premium Guard — PA5433Premium Guard — TA2014Prime Guard Filters — PAF5433Pronto — PA5433Pronto — PA9345Protec-New — PXA42729PUREPRO — A5433PureZone — 9-42729Purolator — A35433Purolator — AF35433Purolator — PA35433Purolator TECH — TA35433Quaker State — QSA9345Service Champ — AF5433Shell - Archived — SHA187Tires Plus — AF2014Warner — AF2014Warner — WAF2014Wix — 42729AF2014DA9345MA5433SA9345VA161