byers319 Posted January 17, 2016 Report Share Posted January 17, 2016 Was hooking up a new system in my Tahoe and disconnected the battery while doing so. After all was said and done, went to start it back up and nothing. Charged the battery and still no go. Called up the dealership and they said it was because of "gm pass lock" and I needed a new bcm or reset the bcm for $350. This seems a little extreme but maybe that is the only option? Just seeing if any of you have a cheaper/more simple fix. Link to comment Share on other sites More sharing options...
Jessica Posted January 17, 2016 Report Share Posted January 17, 2016 hmmm, had a guy at work do this with a impala i think. there is a procedure to reset but not sure if it applies to your tahoe as well. Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
Jessica Posted January 17, 2016 Report Share Posted January 17, 2016 ok This may work: 1. Turn on the ignition, with the engine OFF. 2. Attempt to start the engine, then release the key to ON (vehicle will not start). look at 'security light', after approximately 10 minutes it should shut off 4. Turn off the ignition, and wait 5 seconds. 5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes/ The vehicle is now ready to relearn the Passlock Sensor Data Code The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle. 6.Start the engine (the vehicle has now learned the Passlock Sensor Data Code and/or password). when we did his car it was more like, turn key on and leave on for 10 minutes (more like 15) and then it would start. Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
CleanSierra Posted January 17, 2016 Report Share Posted January 17, 2016 Here you go: https://www.kingbain.com/how-to-permanently-disable-gm-passlock-system/ Passlock sucks Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
byers319 Posted January 17, 2016 Author Report Share Posted January 17, 2016 Should the security light be steady? Or just flash? Link to comment Share on other sites More sharing options...
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