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mwiegand1943 05-02-2005, 12:32 PM I've got a 2004 Suburban that I put a 2004 LLy out of 2004 late model pick-up. My main concern is the best mileage I can get. I do some tag along towing a car trailer to and from Arizona from Mich. I only have about 1500 miles on it now and am getting about 15.5 with mixed city and highway use. What can expect and how do I achieve it. Marv Kappa9012 05-02-2005, 12:49 PM how many miles are on the engine? From what most on here are experiencing, unloaded expect mid/upper teens, loaded 9-12mpg. McRat 05-02-2005, 12:49 PM Unladen you should hit 17-21 mpg hwy with 4x4 auto 7500lb. City driving varies so much, that it's hard to give a reliable number. Mine varies from 9 to 15 city, depending on speed, stop lights, terrain, etc. Bill Gisse 05-02-2005, 01:26 PM Thats quite a feat. How did you take care of the added weight. Did you use the Allison also. Got any pictures. towin43 05-02-2005, 01:28 PM 15.5 MPG mixed is about right. Aron420 05-02-2005, 03:17 PM ya lets see sum pics. cdn111 05-02-2005, 05:27 PM def need some pics SethMcKinney 05-02-2005, 06:11 PM Man you are killing all of us -- please -- I for one am begging :):):):) :nopics: ssduramax 05-02-2005, 07:36 PM Marv, we definitely neeeeed some pics. but, on another note, welcome to the DP. mwiegand1943 05-03-2005, 08:55 AM Will get some pictures when I get suburban washed. Snowed here yesterday. On weight I just adjusted torsion bars up to level the truck. I used a 2500 suburban with 6.0. It would of been better if the suburban had a 8.1. It would of had the right core support. Other than that it looks under the hood just like a pick-up. The body on the suburban had to be set up 2" higher off the frame to clear the transmission and larger rear axle. A farmer in Ohio did the work, he's done a few. Now he'e back on his tractor. Marv | ||