I've got a '92 w/ the 350 and it's getting 13mpg. What are you getting?
I get about 14 mpg highway.
8-16 mpg
9 to 12 mpg depending on how much you carry
12 mpg
bad MPG 8 city 10 or 11 highway
My 1989 G20 van gets 15 mpg
You will be lucky to get around 15 mpg.
I get around 17 mpg with my g20 with the 350 motor \3.42 rearend
On full tank regular with 4.3 V6 over 300 miles. 325-highway
15-16 mpg w/4.3 lt v6 automatic and short wheelbase
Here In Colorado I got about 18 mpg city, but when I drove cross country i was amazed at 27 mpg, pretty economical for an old SUV.
22 MPG City - 28 MPG Highway