DEar fellow techs, might there be a tsb for 2003 hds with rumbling roofs ?? oh yeah, my brother in laws 03 gmc does the same thing..tks in advance, bchttp://dieselplace.com/forum/smileys/Hug.gifhttp://dieselplace.com/forum/smileys/Cry.gifhttp://dieselplace.com/forum/smileys/HiHi.gif


it started this crap today at 75 mph pulling my fiverEdited by: bob camire

Not as of tonight. I checked Bulletins as well as Preliminary Info.


Ed

It's normal. It's called "buffeting". The crew cabs do it more. Dodge mentions it in the owners manual so it's not a GM specific issue. Just change the positions of your windows.Edited by: hoot

It's normal. It's called "buffeting". The crew cabs do it more. Dodge mentions it in the owners manual so it's not a GM specific issue. Just change the positions of your windows.


Are you sure it's the Crew Cabs Hoot?


I've noticed that the CC's have the reinforcing ribs on the top of the cab where the EC's don't have it...http://www.dieselplace.com/forum/smileys/Ermm.gif


He's got an EC, and while I've not noticed it with mine I'm not impressed with it's ability to "oil can" when washing or waxing the top of the cab...http://www.dieselplace.com/forum/smileys/Dead.gif

I'm sure. My GMC crew cab did it and it's nasty when it starts.

I wonder if the older CC roofs had the reinforcing ribs? My 2003 CC does, and I have never noticed anything. But then my cap is at the same height/contour as the CC roof, and probably changes the airflow.

Take a ride down the highway at about 70-80 with all four windows down. Report back.


They all have ribs (crew cabs)

oh that must be why it buffeted..my windows were down..when they disabled my 4wd, they also disabled the ac..


thanx for the inf