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I have a 2005 Chevy Trailblazer EXT with 32000 miles. The check engine light will come on for a day then go off for a couple days. This has been happening for about a month. I also noticed that when the vehicle is cold the RPM's seem to surge intermittingly until you drive a few miles. Could this be a plugged catalytic converter? Any help would be appreciated. Thank You
 

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2004 gmc
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Whenever you get a Check Engine Light the vehicle is trying to tell you something. So check it. Get to a parts store where they will read your codes and then post here what they are. Can't tell ANYTHING without the codes. :yes:

The surging idle issue is almost always a dirty throttle body. Do you have an I6? If so, there's a nice How To article under the "Articles" pulldown menu.

Did I mention we can help you if you get the CODES? :D

Welcome!

PS: We need those codes. ;)
 

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:tiphat Welcome :tiphat Hey Roadie: Do we need the codes to help?:D
 
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