Suburban no start-security light
Posted July 28 2008 - 10:52 AM
Posted July 28 2008 - 7:42 PM
pete(semi ret auto tech)
Posted July 28 2008 - 8:35 PM
You probably will end up replacing the key switch/cylinder too.
Posted July 28 2008 - 9:31 PM
thanks for the replies. I do have tilt wheel- will try moving it tomorrow. I guess if it starts, I still have to fix the broken wire. May try your suggestion with the extra key switch- I assume I have to get it from GM?
I have not tried letting it sit "on". Will try that tomorrow also. I have had this problem happen twice before, but it cleared up. Once I pulled the fuse for the security system and re-inserted it and the security light cleared. Didn't work this time. I disconnected the battery tonight and will reconnect it tomorrow after work- someone suggested I try this.
If I want to replace the ignition switch, does anyone know how big a deal that is?
Posted July 29 2008 - 7:24 AM
Posted July 29 2008 - 7:48 AM
Posted July 29 2008 - 3:50 PM
The truck did not start this morning after reconnecting the battery. I just tried it now and it started fine. No security light warning. I took off lower steering wheel shroud to try and inspect wires, but cannot figure out how to remove top shroud. Might have to pull key assembly and I don't know how to do it. It rained pretty hard this weekend when the trouble started. It's upper 80's today- not sure if drying had anything to do with it.
My issue now is will this happen again and where. Hate to be stuck on the beach one night. I would try the extra ignition switch trick you recommend if the light comes back. I also understand it can be the passlock sensor or computer. Any other ideas on my next course of action, or do you still think it's worth putting the extra switch in? I was able to wiggle the wires in the column and at the switch, as well as move the tilt column to all different positions and it seems to have no effect. Would a dealer be able to read any trouble codes? Would they disappear since I disconnected the battery for 12 hours?
Thanks again guys and Pete thanks for the offer to work on it if you lived closer. I'm sure I can do it, but want to make sure it's not a sensor or something else.
Posted July 29 2008 - 8:08 PM
till tomarro pete
Posted July 29 2008 - 8:30 PM
I really appreciate your advice and time to research. Thanks-Jim
Posted July 30 2008 - 7:41 PM
the best pete
we miss more by not seeing than by not knowing
Posted July 30 2008 - 9:28 PM
thanks. I'm pretty handy so I'll probably have a go at it. I'll google and see if I can find more specific info on how to disassemble. Do I need to get the key cylinder from GM? Also, are there any sites you know of that describes the theory of how this passlock works? Sites I have viewed scared me because they said it could be the passlock sensor or the computer. Not sure I have that system. I agree that it doesn't read my key because I tried a non GM copy today and that also worked fine. Thanks again for your kindness in helping.
Posted July 31 2008 - 7:22 AM
Posted July 31 2008 - 7:04 PM
I have this problem on a 2002 Olds alero (not a car anyone would steal), it's a known problem on many GM vehicles, and most suggest changing the lock mech. Though it seems like this is a dealer only fix, so $. Also the problem is an intermittent one, it may happen 3 times in a week, then not for a month YMMV.
You would think how can they screw up something as simple as an ignition switch, but GM did.
Also if you know any places that install car alarms, stereos etc, they may know a fix/workaround.
Try the truck sites and other automotive forums, as many others have had this prob.
Posted July 31 2008 - 8:29 PM
I think I may have found a fix in a GM bulletin. The bulletin addresses a modification to allow the passlock system work with a remote starter. It involves cutting a yellow wire in the steering column harnes and installing a switch. You then start the vehicle with the switch contacts closed and after 5 seconds you turn the switch to the open position. Then you turn the engine off. It states that the car can now be operated with the remote starter (which I will not be installing) and that the passlock system is no longer in operation. The car will now start without passlock. The downside is that the security light will stay lit (I don't care) and that the computer will log passlock faults (again, don't care). If you disconnect the battery you will have to put the switch into the closed position to start the car and then open the switch and shut down. I guess after the computer receives the proper signal it latches and if you open the line and shut the engine, the computer stays latched in that position until you disconnect power. I paln on trying this mod next week. Will let you kno whow I make out. Of course I will only be able to tell if the car starts, not if I don't get the passlock failure as it is intermittent.
Again thanks to all for help and good fishing.