vacuum diagram for 1999 Dodge Ram ?????

From : chief mcgeechief mcgee

Q: i got 16-17 mpg with my 96 360. it had a 5 speed and a 3.55 axle. steve thanksfor you input everyone seems the seals just dired up the freon is holding after several weeks so if it is a leak its a small one. i try to cycle the ac for a while each time i drive now to kep the seals lubbed. thanks on mar 12 806 pm 0serv...@comcast.net wrote just purchased a 2000 dodge 2500 with a 360 v8 265x75x16 tires quad cab 8 bed i was thinking about the diesel but since it would be used just one in a while i went the gas engine route. i expected around 16mpg highway with the 4.10 rear doing about 55 but the trucks computer is saying im getting 8.4 mpg with an unloaded bed i went out on the highway and cruised about 55 for 10 miles and still reading a tenth better at 8.5 mpg. when i fill up i will hand calculate... but how accurate is it to read the mileage from the on board computer is there any sensor or other issue that could justify such a bad gas mileage if i find out that it really is that bad thanks in advance. .