Went and looked at a 2008 VE with the L98 Motor (6.0L) and on cold start it was chirping. It has 110,xxx on the clock with logbook servicing, however it didn't sound like the usual squeaky belt, it sounded more along the lines of a bird chirp. I have read that it could be the start to something more sinister such as a lifter about to let go however I've read that it is a result of chirping when the motor is warm. The engine was idling at about 600-650 rpm, which seems a tad low? I thought idling for most cars that were stock was around 800-850 rpm. Please advise? The overall drive of the car seemed a little bit shitty, for example gears taking a little bit of lag time to change (Auto Transmission), a little laggy acceleration. Any advice on this?