Have a 2003 Express 3500 6.0L

Having rough and high idle issues. The IACV has two screws and looks like usual. Parts stores and look ups say that whole throttle body must be replaced on this model. Does not make sense. Anybody run into this?

Thanks

 

Rock Auto show one?

 

https://www.rockauto.com/en/catalog/...ac)+valve,6072

Nah, here is the IAC valve you need.It has two bolts you mentioned.

 

Several in fact. They are held in place by two bolts or screws.

 

I see several IAC at RockAuto that may apply, that I get to from a Google search and they supposedly match my vehicle.
But directly on the RockAuto site the parts do not exist for my vehicle.
Disgusted that RockAuto is hiding behind a digital wall and there is no customer service.
This is the category of business I expect from Black Market, Back Alley operations.
So ... trust they have your interest in mind when they take your money.
NOT

 

On the Rock Auto Site, the Link is for a 2500 Express 6L V8. (?)
What is the difference between the 2500 Express 6L V8 and 3500 Express 6L V8?