B4CZR2

I love the 4.3L in my truck, it does a hell of a job. If it had the 6 speed it would tow even better. I usually tow the snowmobile trailer with it in drive and forget its behind me.

The 4.8L never made any sense to me, maybe it was just GMs way of justifying charging an extra thousand or more for the 5.3L since its basically the same damn motor just one small difference to give it a little less power. Anybody looking to buy a truck will just spend a little more that way and get the 5.3L

What I really hope they hurry and come out with is the baby DMAX! I want boat loads of torque with greater efficency

LS1LT1

iTrader: (16)

Yes that 4.5L Duramax stuffed into a 1500 pick up will be a killer combo.

Spoolin

iTrader: (8)

The 4.8L block is exactly the same as the 5.3L block. The only difference between the two is the stroke length. Same top end, pistons, bore width, etc...
The side stamping on these blocks reads 4.8/5.3, so just by looking at the engine it's impossible to tell which size engine came with the vehicle.

5w20

iTrader: (21)

why so many different 5.3's?

Some have aluminum blocks and others cast iron. Aluminum blocks get the 6spd and the iron get the 4spd. They have an iron and aluminum for each fuel type regular unleaded or the flex-fuel.

LMG, LC9, LH6, and LY5

Spoolin

iTrader: (8)

There's also LM7, L33, among a few more I can't remember!!

5w20

iTrader: (21)

well i was going by the 09 model yrs but damn thats a ton of different ones

TT632

iTrader: (3)

Interesting options. Sounds like Good Mother has some work cut out for her.