Aft of Axle Fuel Tank

CAUTION: On 55-gallon fuel tank, loosen strap nuts enough to relieve tension on fuel tank support straps. If tension is not relieved, lower support arms will deform upward, making installation difficult.


NOTE: When the battery is disconnected and reconnected, some abnormal drive symptom may occur while the powertrain control module relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.




REMOVAL
1. To avoid electrical sparking at the fuel tank, disconnect the negative battery cable.
2. Using Rotunda Fuel Storage Tanker 164-R3201 or equivalent, drain fuel tank.
3. Raise vehicle on hoist.
4. Position suitable jack under fuel tank.
5. Remove screws and nuts from fuel tank modification shield and pipe kit. On 55-gallon tank, fuel tank modification shield and pipe kit does not have to be removed to lower tank.
6. Loosen clamps and disconnect fuel tank filler pipe and overflow hoses at fuel tank filler pipe end.
7. On 35 and 55-gallon tanks, upper tank straps do not have to be removed to lower tank. Remove nuts and bolts which secure lower supports to frame.
8. Lower fuel tank.
9. Disconnect fuel tank sending unit and pump electrical connector.
10. Disconnect fuel vapor hose from evaporative emissions valve. Remove short vapor vent hose from grommet in frame.
11. Disconnect fuel supply and return tubes.
12. Remove fuel tank from vehicle.


INSTALLATION
1. Follow removal procedures in reverse order. Tighten fuel tank strap support nuts to 87-119 N.m (65-97 lb ft).