[roosterk0031]

My Cobalt fuel trim had been maxing out off and on for over a year before I finally figured it out. Evap Purge valve was creating a vacuum leak. My code was always a lean code, don't remember the number, even though it was running crazy rich. Got the first replacement part from O' store worked a few months. ACDelco part been working 5 months now.

Tahoe & Cobalt even have the same part number.