I have a 01 C3 truck with the 6.0 and a whipple that is currently apart getting some better rods-pistons-head work.
Prior to this I have had some issues with the truck idling low on occasions, and sometimes even stalling.
I've had it to several dealers, and 2 different shops, along with cleaning the tb myself, and it still has the problem. Yeah, it's been apart to check for vacume leaks.
I'm wondering if a new tb would solve it? Would an aftermarket tb be any better? Thx for any info!

 

I'd guess tuning/computer related problem. Try getting LS1 Edit, it's well worth the expense.

 

what do you mean you cleaned the TB, if you removed any material that could have caused idle problems.

good luck,

allen

 

I mean I removed the throttle body, and cleaned it with solvent/cleaner specifically designed for such to remove the built up carbon.

This was done AFTER the idling issue, and helped only marginally for a short period of time.