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Passlock-No Start-Ignition Switch Replacement

Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Passlock-No Start-Ignition Switch Replacement

Old 07-29-2017, 12:13 PM
Junior Member
Join Date: Jul 2017
Posts: 2

Originally Posted by Kimmb View Post
This worked guys!!! Dont buy or order anything, i tried evrything that evryone recommended & nothing worked but this!!! Couldnt beleive it! After the third try, it fired rite up, no problem
Turn the key & try to start, leave in start position for 10 minutes or til security light quits blinking, turn key to off position for 10 seconds & try to start again. Again, leave in start position til security light quits blinking, 10 minutes, turn key to off position for 10 seconds, repeat this for a 3rd time, after turning key to off position for 10 seconds, it'll fire rite up! Amazing! So happy it worked!!!!
Old 07-29-2017, 03:05 PM
Senior Member
Join Date: May 2012
Posts: 1,963

Originally Posted by shanejackson View Post
Suffering from the same $hit.... seems GM has a bug with this. I was at the PO the other day and a guy in a Colorado had the same problem..... I love my hummer but this crap is getting OLD!

I dont know if I should get a new key cut as I have seen this might help if it is a wore out key (5 year old key.... good chance of it) or just go buy a new sensor and put it in.....


every time i read one of theses stories i think how 10 min could be life or death. would gm be responsible.
you know, a lady stuck in a parking lot, a guy outside with a pipe,,,,,
Old 07-31-2017, 11:08 AM
TAINTER's Avatar
Senior Member
Join Date: Sep 2008
Location: SE Michigan
Posts: 4,514

Keys get worn, lock cylinders wear, people have too much junk hanging off of their key chains, etc. Why would a manufacturer be responsible for a wear item past warranty?
Old 01-10-2019, 10:57 PM
Junior Member
Join Date: Dec 2009
Location: NE of Tampa, FL
Posts: 7
Default But is Passlock the root cause?

In Nov 18 I purchased a low-mileage 07 H3 base for my boys to drive, they’ll be 15 and 16 in February. The car was clean, still smelled new inside and only had 34,XXX miles on it.

I hit the forums since it was a used car as-is no warranty. I read through everyone’s horror stories and decided on a bypass system. I installed the bypass module and have not had an issue with the car starting since.

There have been other signs though. Every now and then I get a message to service the TPMS system and at the same time the compass in the rear view mirror goes dim and is barely legible.

I have a plug-in module so I can read and reset codes. It always says my left front sensor has gone bad. But then the next time I start the car the alarm is gone. I’m going to review the prints some more and see where the compass is powered from. There might be a ground in the wiring somewhere causing things to freak out a bit. I’ll keep you all posted on what I find.
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