OMFG!!!!
I thought my truck was the only one that did that!!
Mine does it to, no ill effects, just here this wahwahwah and then goes away, sounds like it comes from the front of the truck, right??
I have no clue what it is, but decided not to make a stink about it as no one else has posted about this until you....
But like anything else, knocks, clicks, ticks, etc are considered normal by GM, this was probably another of those free "features"....
Bob
2003 GMC 2500HD 4x4 CC SLT D/A, fully loaded!!<br />Upgrade\'s so far:<br />265x75 R16 Pathfinder ATR\'s, Westin CPS Nerf Bars, GM Mud Flaps, 3M Clear Bra, Line-X, Reese 20K Hitch, Prodigy Controller<p><a href=\"http://www.webphotos.com/list_photos.asp?mi=3&smi=1&a=97210\" target=\"_blank\"> My Truck</a><br /><a href=\"http://www.webphotos.com/list_photos.asp?mi=3&smi=1&a=93738\" target=\"_blank\">Our Fifth Wheel</a>