GM Full-Size Trucks 1988-1998 Repair Information

Air Cleaner

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See Figures 1, 2, 3 and 4



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Fig. Fig. 1: Exploded view of the air cleaner housing-All 1988-92 gasoline engines exc. 7.4L



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Fig. Fig. 2: Exploded view of the air cleaner housing-1988-92 7.4L engines



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Fig. Fig. 3: Exploded view of the air cleaner housing-1993 gasoline engines



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Fig. Fig. 4: Exploded view of the air cleaner housing-6.2L diesel engines

The element should be replaced at the recommended intervals shown in the Maintenance Intervals chart later in this section. If your truck is operated under severely dusty conditions or severe operating conditions, more frequent changes will certainly be necessary. Inspect the element at least twice a year. Early spring and early fall are always good times for inspection. Remove the element and check for any perforations or tears in the filter. Check the cleaner housing for signs of dirt or dust that may have leaked through the filter element or in through the snorkel tube. Position a droplight on one side of the element and look through the filter at the light. If no glow of light can be seen through the element material, replace the filter. If holes in the filter element are apparent or signs of dirt seepage through the filter are evident, replace the filter.

REMOVAL & INSTALLATION



See Figures 5, 6, 7, 8 and 9

  1. On older model vehicles, loosen the wingnut(s) and lift off the housing cover. On newer model vehicles, unfasten the retaining clips and separate the two case halves.
  2.  
  3. On the 6.5L diesel, position the cover with the air cleaner flexible hose off to the side.
  4.  



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Fig. Fig. 5: Loosen the wingnut and remove it from the air cleaner cover



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Fig. Fig. 6: Removing the air cleaner cover



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Fig. Fig. 7: Remove the old air cleaner element

  1. Withdraw the element from the housing and discard it.
  2.  
  3. With a clean rag, remove any dirt or dust from the front cover and also from the element seating surface.
  4.  

To install:
  1. Position and install the new filter element so that it seats properly in the housing.
  2.  
  3. On the 6.5L diesel, position the cover with the attached hose over the element and snap the retaining clips into place.
  4.  
  5. On early model vehicles, install the housing lid and tighten the wingnut(s) to about 18 inch lbs. (2 Nm).
  6.  
  7. On late model vehicles, place the housing cover into position and engage the retaining clip.
  8.  


WARNING
Do not drive the vehicle with air cleaner removed. Doing so will allow dirt and a variety of other foreign particles to enter the engine and cause damage and wear. Also, backfiring could cause a fire in the engine compartment.



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Fig. Fig. 8: On newer vehicles, lift up the air cleaner cover-1996 truck shown



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Fig. Fig. 9: Remove the filter element-1996 truck shown

 
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