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I am a retired GM Electrical Engineer. I own a 2002 Grand Am, and had this problem two years ago. I bought a Shop Manual for my car ($130.00), and worked out a way of bypassing the Passlock II system on my vehicle. After making the modification on my car, I have not had a single instance of No start caused by the Security system.
Last week, as a favor to a friend, I performed the same modification on a 2003 Alero. It took less than an hour. (not counting the time I spent taking photos of my progress) The modification was successful on that vehicle.
Details of the modification are posted on my personal website at:
http://www.bergerweb.net
There are instructions on how to do the modification using two methods. Both methods bypass the security module in the ignition circuit. One bypasses it at the connector to the Body Control Module, which is under the glove box. The other does the bypass near the ignition switch, which can be reached by removing the radio.
Please post back if you find the instructions useful.
Richard Berger
Klausyti
Skaityti fonetiškai
Hubby removed the molding underneath (thinking it might be the blower motor resistor gone out yet again), and water spilled out. We also noticed water pooling in the passenger-side footwell, and we could see drips and feel dampness behind the carpet along the firewall. Initially our mechanic thought it was a problem with the case that houses the AC/heater fan; he thought the silicone sealant had cracked loose from its cover. So he pulled off the old silicone and applied more, but we still had the leak.
Hubby also noticed that the rubber seal at the base of the windshield, on the right-hand side, moved slightly when he touched it, so we took it to Apple Auto Glass. He did two things: redid the silicone seal around the lid of the AC/heater fan, and also completely resealed the rubber trim around the windshield. We're not sure which worked, but since then we have had no rainwater leaking in. I tend to think it was the loose windshield trim, since the housing had been recaulked once, and we noticed the loose section on the windshield seal after that.
I just got my alero back from the shop for the car stalling randomly.
It was the fuel pump that was not working right. You needed to bring thear pump stalling in. I recommended you drive the car around close to the auto body shop and wait intell it dies. thats what i did, they where able to find out that the fuel pump at times would stop working after. the fuse for the pump popped.