gm bcm passlock reflash

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=47155
Printed Date: July 13, 2025 at 9:35 AM

Topic: gm bcm passlock reflash

Posted By: promodeepcycle
Subject: gm bcm passlock reflash
Date Posted: January 07, 2005 at 6:33 PM

thats right... be able to reflash the bcm on passlock2 vehicle's.. for whatever resistence you want... .. first with door open attempt to crank the put key back to ign. security light should stay on for 10min. as soon as it goes off. turn key all the way off. then repeat process. on your 4th attempt the vehicle will reflash the bcm with new resistence and it will start.,...if you ever need to do it ..plus its way kool info..

-------------
dont be a pet monkey ..use your dmm

Replies:

Posted By: jrilla
Date Posted: January 07, 2005 at 7:50 PM

What is the purpose of this information?

-------------
J Rilla

Owner/Installer

Posted By: promodeepcycle
Date Posted: January 07, 2005 at 7:51 PM

ive had to reflash before.. so those who dont work at best buy.. might use it one day..

-------------
dont be a pet monkey ..use your dmm

Posted By: auex
Date Posted: January 07, 2005 at 7:57 PM

jrilla wrote:

What is the purpose of this information?

I agree. The resistance should never change, if it does then your connections are bad. Also this isn't the only way to do this.

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Posted By: promodeepcycle
Date Posted: January 07, 2005 at 8:05 PM

NO NO.. YOU GOT ME WRONG... lost keys..????? swapped motors. and bcm's???? and yes you can reflash with a scanner.. but not everyone has a modis.. i dont.. .. ok had a guy with an iroc camero/... and put in a 99 z28 motor.. kept old steering column.. so passlock2 bcm.. but wrong key and column.... .....see where this info can come in handy????

-------------
dont be a pet monkey ..use your dmm

Posted By: auex
Date Posted: January 07, 2005 at 8:09 PM

Lost keys? The resistance is built into the key cylinder not the key. Not that this isn't useful for some people but I know installers who take this info the wrong way and completely bypass passlock using this tip. Oh and the other ways don't involve a gm tech2, scanner.

Also technically I wouldn't think of this as "reflashing" the bcm, more of resetting the bcm. Reflash makes me think that you are reprogramming the board.

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Posted By: promodeepcycle
Date Posted: January 07, 2005 at 8:12 PM

THIS TIP IS NOT FOR PASSLOCK 2 BYPASSES.. ..... sorry about that.. no this tip is for special circumstances only..

-------------
dont be a pet monkey ..use your dmm