NHTSA recall 13V615000

What's wrong: Affects vehicles equipped with 6.6L diesel engines and dual Fuel tanks. In the affected vehicles, the transfer pump which moves fuel from the rear tank to the front tank could malfunction and cause the fuel gauge to indicate an inaccurate reading.

Why it matters: If the fuel gauge indicates an inaccurate reading it may result in the vehicle unexpectedly stalling, increasing the risk of a crash.

The fix: General motors will notify owners and dealers will inspect and replace the fuel transfer pump, as necessary, free of charge. The manufacturer has not yet provided a notification schedule. The recall began on May 30, 2014.