ok, here is how i get it to do it. get in your truck with the engine off, turn the key over to where you would start it, and turn it back. if you go back and forth and listen, it makes an odd sound, almost like water rushing if i remember right. it has to go back and forth between accessory and the point right before you would start it. i hope i'm explaining this right.

Is it the sound of the guages cycling?

i dont know what that means or what it would sound like, sorry. it happens everytime and nothing is wrong so i assume it's ok? i just dont want to be ignoring the warning signs of a soon-to-come problem.

Don't do that :eek:

As Mackin says ~

why not? what's it doing?

It's kinda like the "doin 15MPH in reverse & throw her in drive" thing. Just somethin ya shouldn't do.

i understand that now, i'll stop doin' it.

but what exactly is happening down there when i do?

So what causes the noise?
Jason

I know on the PS at work it is the glow plugs, but I haven't heard the same sound from mine. The only sound that I can recall is the guages and the fan blower starting. (climate control fan)

bump :(

anyone know what it's doing?

It's the AC unit's valves opening. Don't worry about it.

The noise you are hearing is normal and caused by a stepper motor. This is used to move the speedometer needle instead of the traditional magnetic air core gauge. If you watch the needle increment, it will appear to move in small jerks instead of a completely smooth sweep. This is a result of the stepper motor being commanded to change needle position.:Nothing_f

Mus'be tha-thar catastopic disaster flued commin back thru your muffla-bearnings. Its needed to keep yur ezaust gasses from stinkin up the driveway. Kin-o-like a can of Glade.:muahaha:

RF