I was looking on GM Parts Direct for LQ4's or LQ9's. I've come up with different part numbers:

89017356-is in the 2500HD, 3500, Chevy Express, etc.

0089017359- is in the '03 Escalade and Excalade EXT, '04 Silverado 1500

So I'm guess the first part number is the LQ9, and the LQ4 is the second one? Only problem is that one of these part numbers is $11,900 and the other one is $4,100....Can anyone help me on this?

 

Try part #12499467.Best deal I have found on the 6.0 brand new complete engine, intake, injectors, flywheel, waterpump, complete.Cheapest price is from gmpartsdirect.com for 3535.00.Called my local Chev. dealer they told me 3888.00 shipped to them.Maybe tis helps.