One problem related to other fuel system tank assembly has been reported for the 2007 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 GMC Sierra 2500 based on all problems reported for the 2007 Sierra 2500.
I had to replace a fuel line last fall because it rusted thru. . On June 6 2014 I noticed fuel dripping from the fender edge which was found to be a fuel leak from a line on top the tank.