Owner's Manual
Page 250
...To remove the round air cleaner filter for the 4.3L (VIN W) high performance engine, loosen both clamps and lift off cover to ensure that the air cleaner cover tabs are fully inserted into the slots in the air cleaner housing, the two wingscrews are secured, and the PCV tube ... (one on the duct and one on straight and the wingnuts are properly tightened. While reassembling the air cleaner assembly, ensure that the cover is air properly seated in the Index. 6- 14 Remove thecover and change the filter. See "Scheduled Maintenance Services'' in the left . Lift the air cleaner...
...To remove the round air cleaner filter for the 4.3L (VIN W) high performance engine, loosen both clamps and lift off cover to ensure that the air cleaner cover tabs are fully inserted into the slots in the air cleaner housing, the two wingscrews are secured, and the PCV tube ... (one on the duct and one on straight and the wingnuts are properly tightened. While reassembling the air cleaner assembly, ensure that the cover is air properly seated in the Index. 6- 14 Remove thecover and change the filter. See "Scheduled Maintenance Services'' in the left . Lift the air cleaner...