GM 25868538
Fan Shroud, Upper

The first step to replace the upper shroud of the engine coolant fan involves removing the coolant recovery reservoir as well as removing the air cleaner assembly and the air cleaner outlet resonator. You need to detach the a/c suction hose for the 4.3l engine yet separation of the radiator inlet hose applies to all 4.3l, 4.8l, 5.3l, and 6.0l engine types. After disconnecting the Battery Cable from Fan Shroud clips replace it in position while the process continues by extracting the maf sensor wire from the Fan Shroud clip before repositioning it. Start by removing the transmission oil lever indicator before separating the Fan Shroud bolts (1, 3, 4) and (2, 5) Fan Shroud from its position. Position the Fan Shroud first (2, 5) as per the fastener notice before tightening it via Fan Shroud bolts (1, 3, 4) to 6 n.m (53 lb in). Reinstall the transmission oil lever indicator together with the maf sensor wire to the Fan Shroud clip while replacing the Battery Cable to its Fan Shroud clips. The a/c suction hose needs reinstallation for the 4.3l engine although radiator inlet hose reconnecting applies to engines 4.8l, 5.3l and 6.0l. Put the coolant recovery reservoir and air cleaner assembly along with the air cleaner outlet resonator into their proper positions.

The replacement procedure for the engine coolant fan upper shroud demands starting with removal of coolant recovery reservoir then proceeding to engine-specific air cleaner assembly separation. Startswith the removal of the air cleaner outlet resonator followed by the a/c suction hose for 4.3l engines yet the radiator inlet hose removal for 4.8l and 5.3l and 6.0l engines. First disconnect the Battery Cable with the maf sensor wire from the Fan Shroud clips and then take out the transmission oil lever indicator. Remove the Fan Shroud by disconnecting all its bolts. The Fan Shroud should be placed into position before securing it with bolts that must be tightened to 6 nm (53 lb in). Reset the transmission oil lever indicator along with the maf sensor wire and the Battery Cable. The 4.3l engine requires reattaching of the a/c suction hose and the radiator inlet hose installation applies specifically to the 4.8l, 5.3l, and 6.0l engine platforms. The air cleaner outlet resonator and air cleaner assembly need to be installed with the coolant recovery reservoir following them.

The procedure to change the engine coolant fan upper shroud requires removing the coolant recovery reservoir followed by the specific air cleaner assembly for 4.3l, 4.8l, 5.3l, 6.0l, 6.2l, and 7.0l engines and then disconnecting the air cleaner outlet resonator or air cleaner resonator outlet duct when necessary. It is necessary to eliminate the air cleaner outlet resonator or air cleaner resonator outlet duct based on the specific engine design. Engine type 4.3l requires disconnection of the air conditioning (A/C) suction hose yet engine type 4.8l, 5.3l, 6.0l need radiator inlet hose removal. Begin by removing the transmission oil lever indicator before disconnecting the Battery Cable along with the maf sensor wire from the Fan Shroud clips. First remove the Fan Shroud bolts followed by taking out the Fan Shroud. Place the Fan Shroud properly before fastening all bolts to 6 nm (53 lb in) torque specification then put back the transmission oil lever indicator along with maf sensor wire and Battery Cable. The installation process requires installing the suction hose of the a/c system for engines with a 4.3l displacement or the radiator inlet hose for engines of 4.8l, 5.3l, and 6.0l displacement. To complete the installation process you should put back the air cleaner outlet resonator or duct before installing the air cleaner assembly and conclude by fastening the coolant recovery reservoir.

Next, take out the air cleaner assembly specific to the engine type.

Install the fan shroud bolts (1, 3, 4) and tighten them to 6 Nm (53 inch lbs.).

Remove the air cleaner outlet resonator.

First, remove the coolant recovery reservoir and the air cleaner assembly.

Begin by placing the fan shroud (2,5) back in position, ensuring to follow the Fastener Notice.

Reinstall the coolant recovery reservoir.

Begin by installing the fan shroud (2,5) and ensure to follow the Fastener Notice in Service Precautions.

Begin by placing the fan shroud (2,5) back in position.

Install the fan shroud bolts (1, 3, 4) and tighten them to 6 Nm (53 inch lbs.).

Finally, reinstall the air cleaner assembly and the coolant recovery reservoir.

Install the fan shroud bolts (1,3,4) and tighten them to 6 Nm (53 inch lbs.).