I am currently looking to purchase a 95-2002 (roughly) Tahoe. I know that every brand and model of vehicle has their gremlins. Ford Expeditions have broken spark plugs, and broken exhaust studs. Dodge trucks have work out ball joints and leaking plenum gaskets. In the model range I am looking at, what are the common issues to look for or check to avoid buying a high dollar problem? Is there a year that is hard to find parts for or a certain feature that is problematic and costly (like the air-suspension is on the Ford Expeditions)?