GM Passlock '98 Sunfire

[STL_G8GT]

No one stole these cars when they were new and they aren't being stolen now. That said, just bypass it. I've had to do multiple passkey bypasses over the years, the early PK1 seems to fail eventually no matter what. At least they were very easy to bypass with some simple rewiring and disabling the VATS enable option in the ECM/PCM. Had to do it on both of my Camaros and just recently had to put in a bypass module in my brother's 99 Suburban due to the PK2 not working properly anymore. Its not worth the trouble of trying to chase the issue and finally fix it if you can even find it.

Our 99 Suburban did the same thing last summer - the module started to get throw a 1255 communication code after a dead battery and was never the same. It resulted in a pretty random no start situation once every few weeks, and usually when you absolutely needed to get in and drive of course. I just hooked it up to HP tuners and turned Vats off and it was all good. If somebody really wants one of these old cars the key cylinder security features are not going to stop them.

 

[zzyzzx]

I just hooked it up to HP tuners and turned Vats off and it was all good.

I was going to ask if I could turn this feature off with a GM Tech2 clone, but I think the answer to that is no.

 

[STL_G8GT]

I was going to ask if I could turn this feature off with a GM Tech2 clone, but I think the answer to that is no.

No, unfortunately, the tech2 can't disable it. And the start and then disconnect the module only works until the battery dies and then you're back where you are now. A tuning shop may be able to hook it up and do it for a hundred bucks. It would be easy money for them, just takes a few minutes. I know it works for vats I don't know if it works for passlock I/II as well.

 

[LDM]

Our 99 Suburban did the same thing last summer - the module started to get throw a 1255 communication code after a dead battery and was never the same. It resulted in a pretty random no start situation once every few weeks, and usually when you absolutely needed to get in and drive of course. I just hooked it up to HP tuners and turned Vats off and it was all good. If somebody really wants one of these old cars the key cylinder security features are not going to stop them.

Yeah I tried just turning VATS off first with my Tunercat OBD2 but it didn't work. Still wouldn't let the truck start without added the bypass module. And it was a pain to get installed as the PK2 box is up under the dash where it is almost impossible to get to. I just managed to get enough wire out to strip it and connect it to the box as I could barely get my hand in there to connect everything. At least I was able to use some of the small gauge dolphin connectors instead of trying to solder it.

 

[D60]

No, unfortunately, the tech2 can't disable it. And the start and then disconnect the module only works until the battery dies and then you're back where you are now. A tuning shop may be able to hook it up and do it for a hundred bucks. It would be easy money for them, just takes a few minutes. I know it works for vats I don't know if it works for passlock I/II as well.

Apparently Tech2 can unlock the stupid theft radios.

So this just returns me to my rant about how dumb all this stuff is: you need HP Tuners to delete VATS but Tech2 to unlock the radios.....it just gets ridiculous. And yeah, apparently last summer GM discontinued the 800# so you can't just call and get the radio code.

I'll build up some more ranting....give me a minute