Have vehicle scanned to determine the problem and have codes cleared
If the check engine light is flashing as you are driving it means you are about to destroy the catalytic converter(s). Stop the engine and get it to a garage.
It takes a scanner to read the codes.
Just disconnect the battery for a few minutes then reconnect.
How do you reset check engine light for the 2009 Chevy trail blazer?
You can either bring it in to a Chevy dealer or use a programmer/tuner to reset the check engine light.
If the check engine light is blinking that means an engine cylinder misfire has been detected
Check
The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle.
It requires an engine scanner to do that.
No, only a problem that effects emissions will set the check engine light.
A flashing check engine light is an indication of a misfire.
That REQUIRES an ENGINE SCANNER to do that.