Originally, I found that the rattle dash noise would be replicated if I slowed down, this was probably caused by the plastic fan shifting on its axis. I'd also get a constant squeak from the HVAC controls. Once I permanently fixed the fan with durable white lithium grease, the rattle dash noise disappeared, along with the HVAC fan noise. Now I have what appears to be different intermittent rattle from the steering column and/or instrument cluster--next on thing to deal with...