GM S-Series Pick-ups and SUV's 1994-1999 Repair Guide

Air Cleaner

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The air cleaner has a dual purpose. It not only filters the air, but also acts as a flame arrester if the engine should backfire. The engine should never be run without the air cleaner installed unless an engine maintenance procedure specifically requires the temporary removal of the air cleaner. Operating a vehicle without its air cleaner results in some throaty sounds from the engine giving the impression of increased power but will only cause trouble.

Your truck is equipped with an air cleaner element of the paper cartridge type. The element should be replaced every year or 30,000 miles (48,000 km), whichever comes first. If the truck is operated in heavy traffic or under dusty conditions, replace the element at more frequent intervals.

REMOVAL & INSTALLATION



TBI Models

See Figures 1, 2 and 3

  1. If so equipped, unlatch the clamp fasteners around the perimeter of the air cleaner housing.
  2.  
  3. Loosen the wingnut(s) at the center of the air cleaner cover.
  4.  
  5. Remove the cover from the air cleaner assembly, then remove the air cleaner element from the housing.
  6.  

To install:
  1. Using a clean rag, wipe the inside of the air cleaner housing assembly to remove any dirt or debris.
  2.  
  3. Install the air cleaner element to the housing, then position the cover onto the assembly.
  4.  
  5. Secure the cover using the clamp fasteners and/or wingnut(s).
  6.  



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Fig. Fig. 1: Remove the wingnuts from the air cleaner cover-4.3L TBI model shown



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Fig. Fig. 2: Remove the air cleaner cover-4.3L TBI model shown



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Fig. Fig. 3: Remove the old air filter from the housing-4.3L TBI model shown

MFI/CMFI/CSFI Models

See Figures 4 through 10



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Fig. Fig. 4: Unfasten the air cleaner housing retainers-1996 4.3L CSFI model shown



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Fig. Fig. 5: Remove the air filter from the housing-1996 4.3L CSFI model shown

  1. Loosen the housing cover retaining clips, nuts or screws and separate the housing cover from the housing.
  2.  
  3. Remove the air filter assembly.
  4.  

To install:
  1. Using a clean rag, wipe the inside of the air cleaner housing assembly to remove any dirt or debris.
  2.  
  3. Install the air filter assembly.
  4.  
  5. Engage the housing cover and fasten the retainers securely.
  6.  



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Fig. Fig. 6: Unfasten the air cleaner cover retaining clips-2.2L MFI model shown



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Fig. Fig. 7: Separate the air cleaner cover from the housing and pull out the filter element-2.2L MFI model shown



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Fig. Fig. 8: Inspect the filter element for dirt that may cause air flow restrictions, this filter as you can see is saturated with dirt-2.2L MFI model shown



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Fig. Fig. 9: View of the air filter housing and related components-1996 2.2L model shown



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Fig. Fig. 10: Remove the air filter housing cover retainers to access the filter element-1996 and later 4.3L model shown

 
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