Make sure you get the barn doors.
The 91' is by far the best suburban ever made make shure you get a 3/4 ton
4l80e and a front 30 spline 10 bolt and a 9.5 semi floater in the rear.
Good bullet proof axles for the weekend wheeler,i have the same axles and im really hard on my rig and have never broken them yet with 37" tires.
Gas mileage isn't really that bad,parts are cheap and so is insurance and registration.
Here is my 89'(I wish i had a 91')
