2006 GMC 2500hd 310hp with Allison 1000

JohnM · July 29, 2006

Hello,

I am new to the site and am looking at either a 06 Chevy or an 06 GMC with the 6.6L. I know I wanted the Allison 1000 6 speed, but the Chevy has the 650 ft-lbs vs the GMC that has the 605 ft-Lbs tof torque. My original idea was to get the 6 speed and both have it, but which do you think would get the better gas mileage? The GMC is a better price but it doesnt have the newer LBZ engine,.. what am i really missing?

As a side note, either will do the job I need very well.

Thanks

BlackSilver · July 30, 2006

Hello,

I am new to the site and am looking at either a 06 Chevy or an 06 GMC with the 6.6L. I know I wanted the Allison 1000 6 speed, but the Chevy has the 650 ft-lbs vs the GMC that has the 605 ft-Lbs tof torque. My original idea was to get the 6 speed and both have it, but which do you think would get the better gas mileage? The GMC is a better price but it doesnt have the newer LBZ engine,.. what am i really missing?

<{POST_SNAPBACK}>

I've been wrong before (the time I thought I was wrong but I wasn't), but I'm pretty sure both those trucks have identical everything except front end chrome. Especially they have identical engines.

mmmikkke · July 30, 2006

I've seen typos in gm's literature before, and this sounds like another one.

JohnM · July 30, 2006

Yep, you guys are correct, I went out to GMC.com and found the truck I was looking at. It lists it as the 650ft-lbs lbz engine. I have been working through emails on this purchase so I had been going off the dealers website data.

Thank you, this makes my decision a lot easier.

John

dogzapper · July 30, 2006

Yep, you guys are correct, I went out to GMC.com and found the truck I was looking at. It lists it as the 650ft-lbs lbz engine. I have been working through emails on this purchase so I had been going off the dealers website data.

Thank you, this makes my decision a lot easier.

John

You bet, it makes it easier. You DO want an LBZ. The word "fantastic" is a large understatement.

Good luck in getting the finest possible deal.

Steve

Jay P · July 30, 2006

Look at the 8th number in the VIN. 2=LLY 310/605 and D=LBZ 360/650. The LLY was early 2006 and replaced by the LBZ last fall. I don't think you will see any mileage diff between the 2. I got 19.5 to 22 MPG on a vacation this summer(6000 miles). I get around 18 in daily use (60% highway). Mileage will go up as you put miles on the engine.

duramaxHD · July 31, 2006

As long as the truck is a 2006, it has the same engine....dont matter about the VIN

2001-2004.5 dmax's are different

2004.5-2005 dmax's are different

kylant · August 1, 2006

As long as the truck is a 2006, it has the same engine....dont matter about the VIN

2001-2004.5 dmax's are different

2004.5-2005 dmax's are different

<{POST_SNAPBACK}>

Ben is that you??

If so, you know there is a difference between the LLY and LBZ for '06. It seems that it may be a programming calibration, but I am not 100% convinced.

WRONG

Early '06 trucks have an LLY motor vin code 2 (8th digit). They stopped putting these in the trucks at the end of September last year.

All '06 trucks after that have the LBZ motor vin code D (8th digit)

The LBZ engine is rated at 360 hp and 650 torque.

Get the LBZ . Go to thedieselplace.com and look around. There is just about any and everything you could know about these trucks there!

Get the LBZ!!!

dogzapper · August 1, 2006

There were several posts on DieselPlace a couple of months ago about guys who had their new LBZs tested at a dynomometer shop in Vancouver, Washington. That is right across the Columbia River from me and I didn't even know the dyno shop was there. It is.

Anyway, the result of the dyno testing was pretty spectacular. The LBZ CC/SB puts 307 HP and 524.3 ft/lbs of torque on the ground.

No wonder my new truck is soooo powerful. I love it.

Steve