Mechanic's Special 5.7 Vortec, upgraded multi-point fuel injection. Newly replaced Flowmaster catalytic converters. Newer water pump, new battery, newer alternator. Rear axle was replaced about 2 years ago with an updated GM locker setup. Good tires, tow hitch and brake controller. Pioneer Bluetooth stereo. The upper control arms and ball joints were replaced last year. The lower ball joints are in the vehicle but I didn't have the time or correct tools to get them changed yet. The mileage reflected is the vehicle as a whole. The motor was changed for a newer one but I do not know the mileage. 42 gallon tank, roughly half full. The problem: 4L60 tranmission lost 3rd and 4th gear. 4wd slow to activate. Fair amount of leaks for this older Burb. It does run fine and drive in first and second.