i love my suburban i have had no serious problems with it at all. i picked it out when i was about 5 years old when my parents where looking to buy a new vehicle and needless to say it has lasted threw everything my parents used it for and was passed to me when i turned 16. i have used it for long distance trips and as an everyday driver since i got it a few years back and it is unmatched in driver and passenger comfort. i personally prefer it over driving my mothers 2003 Tahoe. If anyone is looking into buying a 94 that looks to be in good shape i say go for it it's an awesome vehicle and you won't be disappointed.
4x4!, folding 2nd row and removable 3rd row seats, powerful 5.7 350 small block!
Just do anything you can to improve the gas mileage, do a cold air intake or just keep the air filter clean and the tires inflated correctly.