Stuck in park and won't start - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #1  
Old 08-21-2009, 10:12 AM
blueblazer blueblazer is offline
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2004 Chevy TrailBlazer LS
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Stuck in park and won't start

I went out to start my truck for work and popped a 40 amp ignition fuse under the hood. At the same time the key got stuck in the run position. Also the shifter won't release from park.
After putting some muscle into it I was able to get the key to turn back and come out of the ignition. Next, I found the source of the problem that caused the ignition fuse to blow and removed it (grounded stereo remote wire). Replaced the fuse and tried to start the truck....no start.
I am pretty good with electrical, (former MECP certified) and traced the starter wire out of the ignition switch, thru the firewall, and to the fuse box under the hood. 12v is making it from the switch to the fuse box, but not from the fuse box to the starter (I think I am checking the right wire on the starter...it looks purple from the top of the engine bay).
Second issue, the shifter is stuck in park. Normally when you press the brake you can here the soleniod release the shifter. Mine no longer does this. Luckily this happened in my driveway so I haven't had to tow the truck.
Any ideas on how to fix this??? Of all the posts I have read, it seems that the ignition switch could be the issue. I have not yet had a chance to replace this due to 4 days of rain and my truck outside. Any other ideas would be greatly appreciated. Riding my motorcycle 35 minutes in the rain to work is no fun.
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  #2  
Old 08-21-2009, 11:59 AM
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the roadie the roadie is offline
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It sure could be the switch, or more blown fuses under the hood. I think you'll find it faster by inspecting them all rather than looking just at a list I could give you from the wiring diagrams.

By forcing the key off, you might have jumped a gear tooth on the ignition switch assy.
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  #3  
Old 08-21-2009, 04:03 PM
blueblazer blueblazer is offline
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I have searched out every fuse....under the hood and under the back seat. All fuses appear to be in proper working order. I guess tonight when I get home I will try to replace the ignition switch. But before I do that, you say I may have skipped a tooth when I forced the key back.....does that mean that my switch may still be good?

If it isn't good anymore and I did skip a tooth, how will I be able to get the proper alignment of the teeth on the new switch? Seeing as how the old one would no longer be in proper alignment.
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Old 08-21-2009, 04:06 PM
blueblazer blueblazer is offline
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Any way I can still get those wiring diagrams? I would be interested in knowing what fuses play a role in the release of the shift lever. Also, what would be the expected color of the starter wire out of the fuse box under the hood and at the starter?
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  #5  
Old 08-21-2009, 04:35 PM
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the roadie the roadie is offline
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I can't scan them at the moment, but still want to get you on track to getting fixed.

Ignition switch thread with pics:
http://forums.trailvoy.com/showthread.php?t=61278

although it isn't very detailed with the teeth area. If you're off by one, then ACC won't work, RUN won't do what you expect, and neither will START. But it's easy to try again and move the gear by one tooth and try again.

The park solenoid is powered as follows: The power comes from the RUN/START bus (out of the ignition switch, so this is how it could be fouled up in the beginning) through backup light fuse #27 under the hood, through the transmission park/neutral switch, then back to the fuse block and fuse #25, then through a switch on the brake pedal then to the solenoid.

The starter signal is indeed purple. And depends on the RUN/START bus having juice. All signs point to the ignition switch being the issue. Forcing it might have busted a tooth.
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  #6  
Old 08-21-2009, 05:16 PM
blueblazer blueblazer is offline
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Thanks for the info. You have been especially helpful. Tonight when I get home I am going to get a new ignition switch and see if I can't get this thing going. I've been looking to sell/trade it. I guess as soon as I get if fixed I am going to try to find something new. If you know anybody in the Birmingham area interested in a 04 Trailblazer, this is going to go for cheap cheap cheap.
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  #7  
Old 08-21-2009, 05:18 PM
blueblazer blueblazer is offline
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If the switch is fouled up, would I still be able to trace the 12v from the starter to the fuse box under the hood? I can trace the starter wire from the ignition switch to the input side of the fuse box and it has 12v, but no crank when I turn the key to start.
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  #8  
Old 08-21-2009, 05:24 PM
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lynch55 lynch55 is offline
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Quote:
Originally Posted by blueblazer View Post
Thanks for the info. You have been especially helpful. Tonight when I get home I am going to get a new ignition switch and see if I can't get this thing going. I've been looking to sell/trade it. I guess as soon as I get if fixed I am going to try to find something new. If you know anybody in the Birmingham area interested in a 04 Trailblazer, this is going to go for cheap cheap cheap.
Whats cheap cheap cheap gonna be?
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  #9  
Old 08-21-2009, 05:36 PM
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the roadie the roadie is offline
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Quote:
Originally Posted by blueblazer View Post
I've been looking to sell/trade it.
Your vehicle knows this. And it's trying to punish you for disloyalty. Oops, and now WE know it, too.
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  #10  
Old 08-21-2009, 05:51 PM
blueblazer blueblazer is offline
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Cheap Cheap Cheap = $5000-6000. It has right at 102k on it now.
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