never heard of the L33, anybody got numbers on it for torque and such? yep, that escalade engine looked appealing as well for not much diff in price. my Dad works for GM, so I can get a really sweet price on new parts- haven't checked how much better a price yet, but I'm sure good enough to be worth having a new motor w/o the hassle of finding a used one with decent miles.

i have 4.10 gears though, so my mileage with my 5.3 is only around 15 or so highway, i'm wondering how much different 6.0 mileage would be?

 

L33 is what I have.
Aluminum block 5.3L
799/243 head castings.
Improved factory cam
Flat top coated pistons.

 

I got mine before V8 did and it pulls strongs I told V8 when i replaced the cam and install the Comp cams and 4.10 gears setup my tuner told me he felt the truck more stronger............I will let V8 chime in with his set up........

 

all it is 5.3L short block with coated pistons
heads are 862 castings
a 2002 6.0L cam same cam used in the LS6 I check the part number on the one that came out of my motor

 

?Huh? the L33, well my L33 has 799 heads. The pistons are flat tops which with the larger combustion chamber brings CR up to 9.9:1

Oh are you referring to the SD link, mybad!

 

I installed the 5.3 h.o. in my 01 GMC sierra Z71 and I also bought a diablo sport in tune programmer for it but compared to my stock 5.3 there is definitely a noticeable difference. I'm so glad I spent the extra money and bought the h.o. I bought mine from jegs free shipping no tax and no core charge. It was 3245.00 for a long block. I searched and searched for days and days and jegs beat everyone. Especially considered free shipping that's 300 core charge saved 300 and no taxes saved at least 300. It only came with 50000 mile warranty not the 100000. So far I'm still happy with the h.o. I have exhaust and cold air intake with a k&n throttle body spacer and a few other. Simple add ons and its pretty fast I race new trucks and they are surprised wondering what's done to my truck. I have fun in it and use it for sure.