GM 15809053
Inlet Pipe, Upper

For the 2wd vehicles when replacing the engine Oil Cooler Hose/pipe, one should first remove the engine oil cooler quick connect fitting. For the vehicles using a 5.3l or 6.0l engine, the procedure is opening the Oil Cooler Hose clip at the lower Fan Shroud and also removing the hoses from that clip while raising the vehicle and supporting it. For the car with an 8.1l engine, take the hoses out of the clip, lift and secure the vehicle, and if fitted, remove the bolts of the engine shield and the engine shield. For engines of 5.3l or 6.0l, remove Oil Cooler Hose bracket bolt and the Oil Cooler Hose adapter bolts ; take out the Oil Cooler Hose assembly and replace the gasket and inspect all fittings, connectors, and hoses for damage. For 8.1l engines, take off the bolt of Oil Cooler Hose bracket, disconnect the quick connect fittings from the engine, remove the hose assembly, and dispose of the gasket while examining for damage. For installation if packaged with an 8.1l engine, connect the quick connect fittings at the engine which requires a distinct snap to be heard when the tube ends are connected and also tighten the Oil Cooler Hose bracket bolt to 50 nm (37 ft. Lbs.). For the 5.3l or 6.0l engines, include the installation of the Oil Cooler Hose assembly with a new gasket, tighten the Oil Cooler Hose adapter bolts 12 nm (106 inch lbs.) and Oil Cooler Hose bracket bolt 25 nm (18 ft. Lbs.). If available, check install the engine shield and bolts, tightening them to 20 nm (15 ft. Lbs.). For 8.1l engines, to the oil cooler line must be fitted with a plastic cap on the end that connects with the quick connect fitting not using the cap to install the cooler line. Finally attach the oil cooler hoses to the clip and in 5.3l or 6.0l project engines snap the Oil Cooler Hose clip to close and pipe the hoses to the Radiator.

To replace the engine oil cooler like/pipes for 4wd vehicles, one should first remove the engine oil cooler quick connect fittings. For engines of 5.3l or 6.0l, use the screwdriver to remove the Oil Cooler Hose from the clip on the lower Fan Shroud and unlock the vehicle from the ground by lifting it with help. For 8.1l engines, remove the hoses from the clip and raise and support the vehicle with jack or utility stands at the rear, if equipped, remove the engine protection shield, and front differential carrier shield. Enplace an adjustable jack under the front differential carrier, remove inner axle housing nuts and washers and the differential carrier upper mounting bolt and nut. Pivot the differential carrier forward and down with the jack supporting it, secure it, and remove the lower mounting bolt and nut, and thenze the jack 4-6 inches. For 5.3 and 6.0l, remove the bolt on the Oil Cooler Hose bracket, the drill bolts on the Oil Cooler Hose adapter, and the Oil Cooler Hose assembly with the gasket, discard the gasket, and check the fittings, connectors, and hoses for defects. For 8.1l engines, first remove the Oil Cooler Hose bracket bolt, and then remove the quick connect fittings at the engine and the Oil Cooler Hose assembly, discarding the gasket and inspect for damages in the fittings, connectors, and hose assembly. If it is installed with an 8.1l engine, install the new Oil Cooler Hose assembly together with the gasket, the quick connect fittings at the engine must feel a distinct snap, install the Oil Cooler Hose bracket bolt that should be tightened up to 50 nm (37 ft. Lbs.). To install Oil Cooler Hose assembly for 5.3l or 6.0l engines, install the new gasket and than install the oil filter cooler hose adapter bolts with 12 nm (106 inch lbs.) and oil filter cooler hose bracket bolts with 25 nm (18ft-pounds). Lift the jack to place the differential carrier, install the lower mounting bolt and nut, swing the carrier up and back, install the nut and bolt of the upper mounting and do not tighten it yet. Install the inner axle housing washers and nuts, torquing them to 100 nm (75 ft. Lbs ), and the upper and lower differential carrier bolts to 100 nm (75 ft. Lbs). Take out the adjustable jack, reinstall the front differential carrier shield and engine protection shield if equipped and remove the jack or utility stand from the rear and lower it. For 8.1l engines install a plastic cap on end of oil cooler line connecting to quick connect fitting before install as well as to the oil cooler hoses to the clip. For 5.3l or 6.0l engines, attach the hoses to the hose clip on the Fan Shroud and clip it closed making sure that the oil cooler line has a plastic cap prior to installation and finish up by attaching the oil cooler lines to the Radiator.

The replacement process for transmission fluid cooler hose/pipe begins by taking the grille assembly off. The transmission fluid cooler hose requires disconnecting both from the auxiliary Oil Cooler and Radiator through quick-connect fitting procedures. To start the replacement raise the vehicle until it reaches proper height then remove the engine protection shield. Begin by disconnecting first the transmission fluid cooler hoses both from the transmission and from the retainer on the engine before removing them from the vehicle. The first installation step involves connecting the transmission fluid cooler hoses to the vehicle then to the transmission while affixing them to the engine retainer. Put back the engine protection shield then drop the vehicle and join the transmission fluid cooler hose to the Radiator and the auxiliary Oil Cooler. Finally, reinstall the grille assembly.

The replacement process for transmission fluid cooler hose/pipe begins by taking the grille assembly off. The transmission fluid cooler hose requires disconnecting both from the auxiliary Oil Cooler and Radiator through quick-connect fitting procedures. To start the replacement raise the vehicle until it reaches proper height then remove the engine protection shield. Begin by disconnecting first the transmission fluid cooler hoses both from the transmission and from the retainer on the engine before removing them from the vehicle. The first installation step involves connecting the transmission fluid cooler hoses to the vehicle then to the transmission while affixing them to the engine retainer. Put back the engine protection shield then drop the vehicle and join the transmission fluid cooler hose to the Radiator and the auxiliary Oil Cooler. Finally, reinstall the grille assembly.

Detach the water pump outlet pipe from the engine oil cooler assembly, discarding the O-ring seal.

Pull the plastic cap back from the quick connect fitting about two inches.

Detach the water pump outlet pipe from the engine oil cooler assembly, discarding the O-ring seal.

Pull the cooler line straight out from the quick connect fitting, remove the oil cooler pipes from the clip at the oil pan, and take the oil cooler pipes from the transmission.