Various niggling problems with models before 2006, such as faulty outside-temperature gauge and poor crimp connection in a/c leading to poor cooling. Squealing from the serpentine drive belt caused by damaged upper idler pulley. Poor V8 performance may be due to vacuum leak at the intake manifold and heard as hissing, and require tightened bolts or replaced gasket with sealer around intake ports. If power steering is noisy and there are no leaks, the reservoir or pump needs to be replaced. The automatic leveling system may stop working due to bad sensors, and need to be replaced by latest version. Early-model ABS may activate unnecessarily under normal braking due to cracks in tone wheels.
