The Aztec is ugly, and I would consider it a bastard of all GM's worst ideas. Having worked on some at the dealer I have done headgaskets (not only on those but lots of 3.4s), wheel bearings, corroded connectors by the gas tank where it goes through the floor, body control modules (they control the rear hatch and have to work for the hatch to open), stupid squeaky suspension bushings that happen to be molded to the control arms and knuckle, broken window regulators, and that's just what comes to mind. Run away.