To remove the M52TU and M54 engines, relieve the fuel system pressure, disconnect the battery, empty the fuel tank, and raise the vehicle. Also, detach brake cables, remove the driveshaft, and trim panels, and disconnect fuel hoses. Support and lower fuel tank, disconnect wiring, and breather hose. Installation is the reverse of removal, add fuel. For M56 engines, remove the rear seat, floor trim, and seal cover, disconnect the electrical connector, and remove the differential and wheel cover. Detach fuel lines, support, and lower tank.