Why does the 1500 6.2L V8 have more HP than the 6.6L LMM?

[DMAXchris]

Originally Posted by D.W.

Did they change something in the engine with the 6.0's between the early 2003-2005 era and the 07.5-08? Because we have 2 2003 6.0's and i pull them up cameron pass and other places in colorado and they do just fine.

Yes, they changed the whole motor. The newer ones are Variable Valve timing and have different ECMs. The truck ran like crap unless your foot was through the floor.

[hec247]

I had a 08 Sierra Denali with the 6.2 in it motor was excellent but is still nothing compared to a duramax

[Duramax09]

No its not anything compared to a duramax but I've pulled my boat with my mothers escalade and it yanked it around pretty good and it has the 6.2L in it. And my boat by itself weighs 4,000 lbs.

[Richie Osgood]

Old thread guys but I have 2 1 tons. The trucks are identical except one has a dmax and the other is a 6.0. They both have dumps, same plow, and sander. The 6.0 is a total bog machine. It has 0 low rpm torque. I have had plenty of times when the gas truck would not move in high range. Had to put it in low range for it to move. The dmax will go no matter what. I also used to plow snow with a 496. As far as I am concerned it was a gas hog with no power.

[DetTigerS09]

I had a 00' 6.0 gasser, with 35's bfgs and 3500 rear end on a 2500 I got 12mpg empty, 7-9 towing a 8k 16ft trailer, single cab lb it hauled ass but cant touch a dmax, you might use more oil in the diesel but it evens out bc of the MPG's