hi there, to change just the barrel, the part which the key moves, all you do is insert the key, turn it one notch, then on top of the ign switch you will see a hole, push it in with a screwdriver, and the whole barrel with key will come out. If you want to change the whole ignition switch, there are 2 bolts holding it on to the column, and you can slacken these with a small punch to remove it complete
zeke balfour, December 2007