The most efficient, easiest way to replace the alternator is from under the vehicle.
Remove lower plastic splash shield.
Remove transmission cooler and reposition cooler out of the way.
Remove lower radiator crossmember support and position a jackstand under radiator for support.
Loosen adjusting T-bolt, but do not remove.
Loosen pivot bolt, but do not remove.
Remove the generator drive belt. Refer to the Cooling System section.
Disconnect the generator field circuit plug.
Remove the B+ terminal nut and wire.
Remove pivot bolt, being careful not to lose spacer.