2007 sierra classic remote start

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=98772
Printed Date: July 06, 2025 at 5:28 AM

Topic: 2007 sierra classic remote start

Posted By: djc78
Subject: 2007 sierra classic remote start
Date Posted: November 08, 2007 at 12:15 PM

Hey all,
I'm about to install a Valet 561R on a 07 Sierra Classic. What bypass module for the passlock do I use? I have a couple dei 556u's laying around but somebody told me these won't work on the 07 classic's. Any info would be appreciated.
Thanks,
Dave

Replies:

Posted By: brcidd
Date Posted: November 08, 2007 at 12:59 PM

I just did an '07 Classic- it still uses the old style bypass like in a '99-02 GM truck or so-- So I used the GMattII That basically supplies the right resistance to bypass the Hall effect resistors in the ignition switch- very straight forward- I found it easier to access the wires att he BCM- and since there were no electric doorlocks- there was no need to put an expensive module in just to do the bypass-- no factory alarms to deal with either- a very simple job-- the GMattII ($7 ) has the variable pot to match up the resistance built into it.

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Brcidd - Engineer That Does Remote Starter Installs on the side.

Posted By: mobile1
Date Posted: November 09, 2007 at 11:24 AM

If you need to do door locks also, I would use the Xk01 from bypass kits. Or the 457G from Directed. The truck uses Passlock II and has data controlled door locks.

Posted By: another-kelly
Date Posted: November 09, 2007 at 3:20 PM

mobile1 wrote:

If you need to do door locks also, I would use the Xk01 from bypass kits. Or the 457G from Directed. The truck uses Passlock II and has data controlled door locks.

ditto (though dei bought xpresskits so it's all the same)