Having problems with your 2004 Chevrolet TrailBlazer ?
Have a 2004 trailblazer that will not idle when air or defrost is on.Help Please.
The throttle body needs cleaning, the butterfly and surrounding area have built up deposits that prevent the butterfly plate from closing all the way. The air inlet tube needs to be removed from the throttle body (TB) and the plate and the surrounding surface cleaned with Throttle Body spray cleaner. Make sure to disconnect the battery for about 30 minutes when doing this cleaning in order to reset the computer and allow it to relearn with the freshly cleaned TB.
Repair Help & Product Troubleshooting for 2004 Chevrolet TrailBlazer
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