I have heard this is a misfire on a given cylinder, but other things can cause this as well, so, pull and read the stored codes to assist. Any auto parts store, mechanic, or dealership can do this.
Normally a flashing check engine light means you have a misfire. Do not ignore this as an engine misfire will damage the O2 sensor and the catalytic converter which are very expensive to replace. Have this repaired immediately.
If the check engine light is blinking that means an engine cylinder misfire has been detected
How do I reset the service engine light on a 2003 Chevy Trailblazer?
When ever the service engine light is blinking you risk doing serious damage to the catalytic converter. I would recommend not using the vehicle until the problem is fixed. Replacing the cat can be very expensive. Have a trusted mechanic diagnose and correct the engine problem.
Maybe you should service the engine soon. :P
can you tell me why my 1999-2000 Chevy trailblazer light is on
Check
A flashing check engine light usually indicates a misfire. You need to check codes to know possible causes.
If the check engine light is blinking that means an engine cylinder misfire has been detected
If the check engine light is blinking that indicates an engine cylinder misfire has been detected
If the check engine light is blinking that means an engine cylinder misfire has been detected
If the check engine light is blinking that means an engine cylinder misfire has been detected