Some 2012 to 2013 Chevrolet Silverado and GMC Sierra HDs with the 6.6L diesel are being recalled because the transfer pump could malfunction and cause the fuel gauge to give a bogus reading. You can call (800) 222-1020 for Chevy or (800) 462-8782 for GMC. Recall number 13420. Dealers will replace the fuel transfer pump.