Hi Guys i have 05 colorado and have the check engine light on the problem is that the truck idles out when either slow down or make a sharp turn stoping or just turning into the garage does anyone know what the problem is ???

 

Go to the parts store and purchase thottle body cleaner. Cean the flapper at the thotte body..It really worked for johnboy!!

 

A little late, but I would suggest the same thing. You probably have some carbon build up on the butterfly valve, causing it to stick. Cleaning the throttle body should help this.

 

I had that happening on another vehicle. Was throttle positioning sensor.