511027
Service Bulletin/Repair Instructions
Your Chevrolet Express or GMC Savana vehicle may be equipped with an improperly functioning on-board emission-related diagnostic system that violates California and Federal standards and regulations.
Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
511027
Your Chevrolet Express or GMC Savana vehicle may be equipped with an improperly functioning on-board emission-related diagnostic system that violates California and Federal standards and regulations.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.