The Impala, as well as other GM models, have a passive theft deterrent called 'Passlock' which will prevent your car from starting if there was an attempted theft or other unauthorized entry into the ignition. However, this same system is prone to randomly and sometimes frequently engage itself even when the car is being used properly.
Solutions: 1) If the car will not start or "crank", turn you key in the ignition to the 'on' position and leave it there for a minimum 20 minutes. After 20 minutes, turn the key to the 'off' position for two minutes. Now attempt to start the car. This is a built-in feature of the Passlock system to override the security lock. 2) If this does not work, you may need to have the car taken to a dealer (a regular mechanic will not be able to guarantee a fix). They will check for a diagnostic code, and if one is present which relates to this system, they will advise that you replace the BCM (Body Control Module), ignition cylinder, and the ignition switch. This will be around $800 depending upon your dealer and where you are located. Unfortunately, unless you systematically isolate each component, you may not know which part is actually causing the problem. However, the most likely culprit is a faulty ignition cylinder or a bad BCM. The BCM's are known to be "buggy".
GM is well aware of this problem, but they will not issue a recall.
Hope this helps a little.
5x8 in the doors and 6x9 in the rear dash
When an anti theft system light comes on while driving a 98 Chevy Malibu, the problem is usually caused by the Security Module. The security module is part of the Ignition Lock Module.
the cover comes off and you take the 4 screws out then unhook the cables
check the brake fluid reservoir and add fluid if necessary.
Buy a kit at Wal-Mart or auto parts - comes with instructions fittings and adaptors
It unbolts on the outside of the firewall and comes out inside the car on passenger side up under the dash.
ADDED: I would suspect that the flasher unit might be faulty. It's that little 'can-like' looking thing that gives the 'ticking' sound when the bulb blinks. Good luck.We have had the same problem on a 2000 Chevy impala. We have replaced the hazzard switch. That did not help. We are clueless too. xxlilachickxx@AOL.com
go to tubesound.com-to disable passlock system for good. just type in problem and make of vehicle when page comes up. ---tubesound.com/passlocksystem--
It is mounted outside under the windshield. Purchase a Purolator cabin filter, as it comes with complete instructions.
The seat cover that comes stock on a Chevy Implala are designed to resist spills and stains. With a comfortable leather design, they are not only durable, but also pleasing to the eye.
It is built into the Mass Air Flow sensor. That is in the air duct hose that comes from the air filter box and goes to the engine.
unleaded fuel................. seriously just use what you can afford i've found that when i use 87 octane, my car engine lights comes on and i get a traction control problem, but when i use 92-93 octane i don't have any problems!