One of the more common problems with Chevrolet Malibus is attributed to the Passlock II system. This anti-theft security feature causes the vehicle to disable the fuel injectors, preventing theft. Malibu owners have complained that the Passlock system goes off unprovoked, making it impossible to start the vehicle. One solution to this problem is to disable the Passlock system.
Disconnect the vehicle's battery. Use a small screwdriver to gently pry off the bezel surrounding the ignition key lock.
Remove the radio as far as possible by disconnecting three screws from its face. Do not disconnect any wires. Removing the radio allows you to see the ignition key area.
Look inside the ignition key area; locate the wires that operate the Passlock system. The wires are in a group of three that connect to the side of the ignition lock. One wire is black, one white and one yellow.
Cut the yellow wire in the middle. Install a new toggle switch in the wire series, using the yellow wire. When installing the toggle switch, use about 14 inches of wire. This allows switch mounting in the hidden but accessible location behind the ashtray.
Turn the switch to the "ON" setting. Reassemble the radio and key lock bezel.
Turn on the car and let the vehicle idle. Turn the toggle switch to the "OFF" position. This disables the Malibu's Passlock system.
