Upon 100% completion of GTA: Vice City on the original PlayStation 2 release, throwing a remote grenade will make the Detonator remain in the inventory due to the infinite ammo reward. To remove the Detonator, the player would need to buy other weapons, die, get arrested or go through a metal detector (as above). This has been fixed in later versions.
The HUD icon in Grand Theft Auto: Vice City is the same as that of the normal grenade, but is replaced by that of the Detonator when thrown
The HUD icon in GTA Liberty City Stories and GTA Vice City Stories