Isuzu Trooper injectors

hi i have a 1999 trooper 3.0 litre diesel do u need special tools to remove and refit injectors also my 4 high low lever seems siezed any ideas thanks
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hi i have a 1999 trooper 3.0 litre diesel do u need special tools to remove and refit injectors also my 4 high low lever seems siezed any ideas thanks