The ignition lock cylinder on an Isuzu unlocks the ignition and allows you to start your Isuzu's engine. When this component breaks, you won't be able to turn your ignition key. Replacement ignition lock cylinders can be purchased from an Isuzu dealership or from some auto parts stores. However, if your Isuzu uses a transponder key, as many newer models do, you will need to have a special key made along with your new ignition--both of which must be purchased from Isuzu.
Open the hood and loosen the retaining nut on the cable clamp running to the negative battery terminal. Then slide the negative cable clamp off of the negative battery terminal.
Drill a 3/8-inch hole in to the right of the keyhole in your Isuzu's ignition. Drill 1 inch deep into the ignition.
Pick the lock rod out of the Isuzu's lock cylinder using a pick tool.
Insert the old ignition key into the keyhole and turn the ignition cylinder to the "II" position. With the lock rod removed, you should be able to easily turn the ignition now.
Pull the ignition out of the steering column with the ignition key.
