I'm wondering how many sensor lights in a Trailblazer. I took my 2004 TB in due to an "engine light" and was told there are hundresd of sensors and eventhough an analyzer gives them the "code" it may be another.

 

Welcome to the forum, Did you happen to get the code from the engine light, they are correct it could be alot of things but if you can get the engine light code(s) and post them in the proper section of the forum we can probably get you in the right direction. Most all auto stores & shops will scan your engine for free and give you the code(s).