Question about 2007 Chevrolet TrailBlazer SS

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Engine will not turn over and security will not release

2007 trailblazer won't turn over. Battery and cables check out fine The security lock on guage panel stays locked. Could I have a problem with the neutral safety switch on transmission.... as to where everything seems to come on but engine won't turn over because of lock-out?????

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  • egag22000 May 17, 2009

    so how do you get it out of theft mode????

  • egag22000 May 17, 2009

    how do I get the 2007 Trailblazer out of theft mode???

  • egag22000 May 17, 2009

    thank you!!! I will go and try that....

  • egag22000 May 18, 2009

    I WILL LET YOU KNOW ...... THANKS!!

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1 Answer

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  • Master
  • 710 Answers

HAVE YOU CHECKED THE STARTER FUSE AND RELAY? TRY TO START THE CAR IN NEUTRAL. IF IT STARTS, THEN THE NEUTRAL SAFETY SWITCH IS DEFECTIVE AND NEEDS TO BE REPLACED, BUT IT SEEMS A BIT PREMATURE FOR SUCH A YOUNG VEHICLE. IT COULD BE A FUSE OR THE VEHICLE COULD BE IN THEFT MODE. HOPE THIS HELPS. PLEASE KEEP ME POSTED. THANKS FOR AN HONEST RATING AND FOR USING FIX-YA. IF YOU ARE STILL HAVING DIFFICULTIES, PERHAPS A LIVE CHAT WILL BE A FASTER SOLUTION. GOOD LUCK

Posted on May 17, 2009

  • Mark L. Roberts Jr.
    Mark L. Roberts Jr. May 17, 2009

    TURN THE KEY TO THE ACCESSORY POSITION FOR 10-15MINUTES AND TURN IT OFF AND THEN TRY TO START. THANKS FOR THE RATING AND FOR USING FIX-YA. GOOD LUCK. PLEASE KEEP ME POSTED.

  • Mark L. Roberts Jr.
    Mark L. Roberts Jr. May 17, 2009

    LET ME KNOW IF THIS SOLVES THE PROBLEM

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There are several possibilities ranging from a defective starter, to bad cable connections, to the onboard security system locking out the starter relay, or an aftermarket accessory interfering with the starter circuit, or a locked-up/damaged engine.

I have had vehicles towed into my shop for similar complaints when the only problem was that the customer was using a cheap duplicate key that they had made at the hardware store that did not have the required computer chip in it.

I have also had vehicles towed in where the customer had replaced the battery and did not have good cable connections or forgot to connect one of the wires that was supposed to to get hooked-up to the battery connector.

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It is really hard to say without being able to see the truck.

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If the security light is blinking, then the security system is DEFINATELY the reason why your car won't start. The actual cause of the problem is MOST LIKELY a defective ignition switch that is not sending the information from your key to the computer.

Try this:

FIRST try a different key if you have more than one for the vehicle. I have had cars towed into my shop simply because someone was trying to use a cheap duplicate key that was cut at the hardware store. These keys are fine for the doors and trunk. They are great to have around in case you lock your keys in your car. However, they do not have the electronics built into them to allow for engine starting.

If you are using the correct key and a second key also does not work. then...
1. set your parking brake (this will disable your daytime running lamps and conserve battery power.)
2. Connect a battery charger to the vehicle battery if you have one, or see if someone can connect to your battery with jumper cables.
3. Turn the ignition to the START position for about one second. Then release the key to the RUN position. DO NOT turn the ignition OFF.
4. Wait about 10 minutes until the security light quits flashing. Turn the key (without turning it off) to the START position again. The engine should start. If it does not, then you will have to get your car towed in for service.

HINT: you may want to try this a couple times to make sure you are doing it correctly before towing.

If it does start, it is recommended that you have your security system checked for fault codes. I have seen this many times, and it only gets worse and does it more often until this method no longer works to get it started.

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My trail blazer 2006 wont start and it has a light on of a car with a lock what does this mean heeelp please as soon as possible emergency


You have now experienced GM's terrible anti theft security system. These systems are known for failing and will cost you an arm and a leg to fix. Anywhere from $350 - $700 plus labor. Most mechanics wont even touch these "PASSkey" security systems.You'll have to go to a Dealer mechanic. The good news is that you can bypass these systems permanently. And you're vehicle is one of these lucky ones that CAN be bypassed. This link should help you find what you need and help inform you of how this system works.

http://vatspasslockpasskeysecurityhelp.yolasite.com/ TRAILBLAZER 2002 2003 2004 2005 2006 2007 2008 Effected by Passlock/PASSkey Failure. tayjoejoe_17.jpg

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When i use the key fob to lock the doors the back glass dont lock, ???????


This solution applies to models:
2002-2007 Chevrolet Trailblazer, Trailblazer EXT and Trailblazer SS
2004-2007 Buick Rainier
2002-2007 GMC Envoy, Envoy XL, and Envoy Denali
2002-2004 Oldsmobile Bravada
2005-2007 Saab 9-7x

Condition/Concern:
Rear liftgate glass will not lock when using the key fob or door switch unless the lock button is pressed a second time. All other doors will lock normally. This could be the result of the liftgate glass lock rod not adjusted correctly. This lock rod travels from the liftgate lock actuator to the glass release push-button cylinder.

Recommendation/Instructions:
Remove the inside rear liftgate trim panel. Disconnect the threaded lock rod clip at the end of the push-button glass release and rotate this clip 1 complete turn at a time making the lock rod longer. This will be the only threaded lock rod visible when the trim panel is removed and the liftgate is raised.
Note: For the rear glass to release, the rear liftgate latch must be in the closed position. For test purposes only, this latch can be made closed to make this lock rod adjustment.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

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