Drain off the cooling system to replace the surge tank inlet hose. Reposition the surge tank inlet hose clamp at the Radiator, then disconnect the surge tank inlet hose from the Radiator if outfitted with a 4.3l, 4.8l, 5.3l, 6.0l, or 8.1l engine, or from the Radiator if outfitted with a 6.6l engine. Then make sure to relocate the surge tank inlet hose clamp at the surge tank and remove the surge tank inlet hose from the surge tank for both engine types. For installation, if one comes with a 6.6l engine install the surge tank inlet hose to the surge tank. Similarly, proceed with the same for the 4.3l 4.8l 5.3l 6.0l, or the 8.1l erectile. Take the surge tank inlet hose clamp and fix it at the surge tank while installing the surge tank inlet hose at the Radiator for 6.6l engine, then the same for 4.3l, 4.8l, 5.3l, 6.0l or 8.1l engines. Finally, set the inlet hose clamp from the surge tank at the Radiator and pour in the cooling system.