Jump to content


This topic is now archived and is closed to further replies.


2007 Yukon Denali Rough Idle

Recommended Posts

My check engine light came on a couple weeks ago and I brought it to the shop. I pulled a code on it first; P0121. Shop said the throttle body and valves where really dirty and they did a fuel service on it. Light is now off, obviously they cleared the codes, but now idles really rough. Sometimes it will remain idling at 2100 in park. I took it back a couple of times and they owner said I need to take it to GM to have the ECM re-flashed/re-programmed. Has anyone had this issue with their Yukon/Tahoe? I'm really frustrated because I know the dealer is going to charge me $100 for a diagnostic fee even though I think I already know what it needs.


Any feed back would be cool.


Thanks guys,



Share this post

Link to post
Share on other sites


Important Information

By using this site, you agree to our Terms of Use.