On 4WD models, it will be necessary to either remove the front axle/differential assembly or remove the engine from the vehicle in order to remove the oil pan. Begin by disconnecting the cable from the negative terminal of the battery. Raise the front of the vehicle and place it securely on jackstands. Drain the engine oil and remove the splash shield from underneath the engine. Remove the bolts and nuts that secure oil pan No. 2 (the smaller stamped steel pan) to the larger cast aluminum oil pan, which may be stuck due to RTV sealant; tap it loose with a rubber-tipped mallet or carefully cut the sealant with a putty knife and hammer, ensuring not to damage the mating surfaces. Next, remove the two oil pump pickup tube/strainer mounting nuts and the pickup/strainer assembly, followed by the four bolts that attach the flywheel housing cover and the cover itself. Remove the 17 bolts and 2 nuts securing the oil pan to the engine block, along with the 4 stud bolts, and carefully pry the oil pan loose from the engine block, taking care to only pry in the small cutout areas along the side of the pan. For installation, use a scraper to remove all traces of old sealant from the block and oil pan, and clean the mating surfaces with brake system cleaner. Ensure the threaded holes in the block are clean and check the flange of the steel oil pan for distortion around the bolt holes, flattening it if necessary. Inspect the strainer for cracks or blockage, clean it with solvent, and install it using a new gasket, tightening the fasteners to the specific torque. Apply a 1/8 inch bead of RTV sealant to the upper oil pan flange, position the pan onto the block, and install the fasteners, tightening them to the specific torque in several steps while working from the center out. After installing the aluminum portion of the oil pan, apply a bead of RTV sealant to the flange of the No. 2 oil pan, position it on the upper oil pan, and install the bolts, again tightening them to the specific torque in several steps while working from the center out. Finally, the remainder of installation is the reverse of removal; add oil and install a new filter, then run the engine and check for leaks.