I have a 2004 Z71 silverado 5.3L 4X4. I would like to upgrade the TB on. What would your recommendations be?
The mods are HT1 cam,CNC5.3 heads, 4.56gears, K&N cold air system, Pacesetter LT and Y pipe. It has been tunes also.


I have seen this one but not sure it would work or not.
LS3 LS7 L99 90mm Throttle Body Corvette Camaro SS Z06 G8 NEW GM 09 2009 10 12 | eBay

 

We were just talking about that. Some more info for ya here
https://www.performancetrucks.net/fo...-today-496330/

 

So one of these will fit? I'm not sure what the factory size is now or pretty much anything about them. I'm a gun guy doing truck mods.

I searched the PN number and didn't come up with anything.

 

I believe from what I have read 87 is stock and that one is a 90 and should bolt right on. Ask Brutal, he knows a lot more about this than I do and I don't want to steer you wrong.

 

10-4 Thanks for the info. I'm searching to see if there is a cross reference and not much I can fine on them yet.

 

If your truck is an 04 and is still stock, it will have a 78mm 3 bolt throttlebody. A newer 4 bolt 87mm or 90mm will NOT bolt up to your intake. Search around there are plenty of threads that discuss what to do with swapping intakes and throttle bodies.

 

Thanks for chiming in Fast.

 

What about on a '06 5.3L?

 

Never mind '06 is also 3-bolt.

 

Any thoughts on this set up? It sounds pretty easy but a little costly but maybe the simplest

LS3 LS7 L99 90mm Throttle Body Corvette Camaro SS Z06 G8 NEW GM 09 2009 10 12 | eBay

Torque Rush LS2, LS7, LS3 to LS1 throttle body adapter harness
The 2.1 wiring

and this adaptor
http://www.ebay.com/itm/LS2-LS1-adap...item3369de993b