heratage

i recently test drov a high top v 6 2012 nv 2500 and acording to the computer i was averaging 19 mpg @ 65 mph high way and 16 mpg city . And the van was empty . im working out of a 08 silverado now 1500 v 6 and it only gets 17 highway @ 65 mph and 15 mpg city and its packed with tools with bed slide . would be nice not climbing in and out of back of truck plus the cap needs new seals . probley will buy.