JMC 1994 Automatic Gasoline mileage: 300 KM or more GMC Suburban, original body, no accidents, original paint. It has been stationary under a canopy for approximately 10 years. I don't remember the exact mileage, but it's around 316,000 km. Its interior is very clean and its body is clean, but its registration has expired for maybe over 10 years. I don't know what maintenance it needs after being stationary.