Ford's are cheap, that's why some many companies have them. I love Dodge, but they are over built so they have the lowest mpg, but if it's only a work truck it's worth it. A Chevy should be cheaper than a GMC and they have the same parts.
Most likely a Chevy, not a Ford if your plowing. Just my opinion, I drive a 2006 GMC 2500hd crew cab 6.0L gas and get 10mpg. I am going to take the tailgate off tomorrow to see if it helps any.
There is an Old Blue Chair for each and every one of us, we just have to find it.
2006 GMC Sierra 2500hd crew cab
BOSS 8'2" Power V
Hustler X-one 60" 3 bin bagger
Toro Proline 36" wb w/t-bar controls
Shindaiwa T254, Echo trimmers, chainsaws, pole hedge trimmer, pole saw, hedge trimmer
Shindaiwa 633 and Echo 760LN