First release the fuel pressure by removing the fuel pump relay then starting car till it won.t run any more, you can get a kit from repco or supercheap to help you remove the fuel lines from filter, if you buy the new filter from holden then you get a new plastic bracket that holds the filter to the underbody if you buy aftermarket then you don't get this bracket so don't damage bracket. a couple of tips blow the little connectors out with compressed air to remove any build up of dirt and work the clips back and forward, also when putting filter back on put a drop of engine oil on each end of the filter this aids in the correct seating of the locking tabs. DO NOT USE MULTI GRIPS ONTHE LINES AS THEY ARE PLASTIC AND THEY MIGHT SPLIT. and believe me when i say you do not want to have to replace the lines, you must relieve the pressure or they will not come off.