Sorry for confusion we never had the security light flashing ...... only time the security light has even came on is when we're exiting vehicle key is out and hit lock button then it flashes till door is shut then goes off just like it's supposed to

 

You need to get the code read! If you can't get it to a shop, can you borrow a code reader from someone?

 

Trailblazer headed to shop last night I was out of options keep y'all posted

 

You need to get that code read. It will lead you in the right direction.

 

P1120 p1321 p1523 p1515 p1516 are the codes that came back ..... I know 1515 and 16 are TPS but can't find the others

 

crickets chirping is all I hear ....lol any suggestions

 

well got call today throttle body actuator motor froze up so here go JY diving I can't afford 387 plus tax for a new one

 

Update 7-7-18 Trailblazer back running with JY throttle body replacement