Whistling noise
 

I get a whistling noise at start up. But not all the time and by the time I get out and get the hood opened, it is gone. I did a search and did not see the problem posted, but I could have missed it. If this has been asked before, I apologize.

Does is sound like a dustbuster is on in your glovebox?

It could be, it happens at random.

Secondary Air Injection pump activating.

That is okay then. right?

Yes it is normal, Disco Mike or someone else can give you a technical explanation (or check the "Emissions Control - V8" section of the RAVE)

Thanks, I am heading up to the Dixie Run this weekend and wanted to be sure.

changing the filter (you have to make a new one) sometimes quiets it down a bit.

Check the write up section for a how to on replacing the filter for the SAI.
It is a emissions device, it pumps fresh air into the exhaust to speed up the catalytic converters reaching optimum operating temp.
It works like a black smiths bellows on a fire.
It only comes on when the engine temp is below "X" degree's, thats why its at random and it only runs for 30 sec.

Thanks for the info, I will check the write ups.