2008. How do I program immobilizer? - Chevrolet Cars & Trucks

Question edited for clarity.
Question moved to model category.

Best advice from our Expert Jeff who is a full time auto electronics technician.

Jeff Armer Oct 06, 2023 cheapest easiest way possible please preferably free??? It's not that simple, you won't be able to do anything. And how do you know it's the anti-theft (immobilizer)? Do you own a professional grade or factory scan tool to read DTC'S - diagnostic trouble codes in all the modules on the vehicle?
Plus, won't start how? Turn the key to start an nothing happens? Do you have one or two keys ? Try them both. At best you need to have keys programmed .Mobile locksmith or dealer. No way around it.

If you are sure it is the key and immobilizer

https://www.google.com/search?q=mobile+auto+locksmith+near+me

Or if you are guessing. There could be so many things stopping it running.

https://www.google.com/search?q=mobile+auto+electrician+near+me

..

definitely has a anti-theft system ( immobilizer) You can't by-pass anything . Your best bet ,call a mobile lock smith . He can cut you a new key and program it to the vehicle computers

Most bypass kits require the installation of a permanent chipped key that's been programmed to the vehicle. By the time you buy another key, get it programmed, buy the kit and install it, you'll have spent more than it costs to just fix the system. Plus, if you read the reviews on the bypass kits, they're very unreliable. See this post on how to fix yours. http://ricksfreeautorepairadvice.com/ford-pats-antitheft-system/

hello
u will find a lot of wiring diagrams and circuit diagrams help books and stuff like this at reliable-store
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This is an engine immobilizer code, the computer does not recognize the key you are using. Make sure you are using the key that always started it before, any other non programmed key will not work, it has to be a key with a transponder chip and it has to be programmed to work with the computer.

Chevrolet TrailBlazer - Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/Chevrolet_TrailBlazer
WikipediaProduction of the Blazer overlapped with the TrailBlazer until 2005, when the 2-door ...2006-2008 Chevrolet TrailBlazer LT ... The Active Fuel Management system on the V8 engine shuts off 4 of the 8 ... 2003-2005 Chevrolet TrailBlazer EXT.

Trailblazer cranks but won't start - first things to check ...

? 3:42
www.youtube.com/watch?v=4O-wplilVV0

Mar 6, 2012 - Uploaded by MAY03LT
These are the first tests that I do when I have a Trailblazer that won't start. ... Car will not start trouble shooting guide, wontcrank, wont turn over, etc. ... Chevy Trailblazer - testing fuel pressure 2002 -2004 4.2 I6 - Duration: 4:34.

dear , if this indicator is yellow color , you need to check key immobilize . small chip in side key < it may fall down , then lose
return back then start , anther wise return to dealer , to re program
key

try a scan tool reset as removing the terminal or loose terminal may have corrupted the program in the ecm for the immobilizer

Yes, But if the key is used, the procedure is call reset the immobilizer ecu, not just program the key, this procedure is done

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