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.
511869
According to GM Recall 24V702: "The brake lines in these cutaway vehicles may not meet the recommended clearance to the GM-provided body mounts. If brake lines contact the body mounts, the brake line may experience wear or damage that could lead to a brake fluid leak. A brake fluid leak can result in reduced stopping performance or inoperative service brakes, increasing the risk of a crash.
CV1-4
Provide an update that would prevent possible message corruption that could take place on the RVC network.
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.