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Duramax 6600 Discussion Forum for the Duramax 6600 Diesel Engine, including the LB7, LLY, LBZ & LMM engine specific topics.

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  #21  
Old 07-02-2006, 07:43 PM
tsitts's Avatar
tsitts tsitts is offline
2006 3500 4X4 Ext Cab LBZ SLT Dually
 
Join Date: Jul 2006
Location: Colorado
Posts: 1
Default Denver to Kansas City and Back

Just traded my 04 2500HD LLY 38000 miles on a new 06 3500 LBZ Dually, drove from Denver to KC to drop off old truck and pick up new. 80 mph the whole way 570 miles.

Outbound trip in LLY 16.9 mpg overall
Return trip in LBZ 11-12 mpg for the first 300 miles, 15.3 mpg in the last 270.

Next day 100 miles of local driving 600 miles on odometer 55-65 mph, 15.9.

LLY 5 speed allison 80 mph, 2400 rpm
LBZ 6 speed allison 80 mph, 2050 rpm

Looking good to beat 04 mpg once fully broken in.
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  #22  
Old 07-08-2006, 09:46 PM
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Prestonia24 Prestonia24 is offline
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Location: Los Angeles, CA
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First Post Here, let me say I thought I knew a lot about diesels before i bought one lol, (I drive a 2005 Ford E350 Ambulance w/ a PowerStroke Diesel about 2,000 miles a month). Definately knew that i didn't want to drive a Ford Truck (Never have liked them, their diesels don't impress me much)
- but there's always room to learn a bit more, and these forums are filled with information from Diesel owners.

I'm 21 Years old and work as an EMT for a local ambulance company here in SoCal, and just recently purchased a 2006 Chevy Silverado 2500HD w/ the LBZ Duramax 6.6L Diesel, and i'm quite impressed. I'm dwindling down the last quarter of the first tank (the tank the dealer purchased lol) and the DIC is saying i'm only getting 13.5mpg, but hey, i know that the mpg will get better as it gets 'broken in'. My 01 Sierra got 14mpg and i have much more truck than before.

The 6th gear on the new Allison tranny is wonderful, i can cruise down the freeway at 75-80 no sweat, and the acceleration is terrific for a diesel (at the cost of fuel economy, but w/e).

I purchased the truck because i wanted a larger cab and 4x4 capability, for when i go skiing in the winter (my old 2wd w/ snow chains didn't cut the mustard, even for California mountain driving).

I met many Duramax owners before i purchased one myself, and they all told me how wonderful their experience had been with their GM truck.

Plan to put some larger/wider tires and when the Banks aftermarket kits come out for the LBZ Diesels, i'm thinking about changing the exhaust and some aftermarket guages as well.... After all, 360 HP is 'sufficient' at this point, but who knows, i might want 'more' lol....
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2006 Chevy Silverado 2500HD Crew Cab (Dark Blue Metallic) 4x4 w/ LBZ, 3LT trim package (Leather, XM, ON-star) - Banks Six Gun with PowerPDA... Purchased 6/29/06 - 46000 miles
2001 GMC Sierra 1500 Banana Yellow Xcab w/ 5.3L, 110k miles riding on 20" chrome rims & 295/55 Goodyear Eagle LS Tires, ~14-16mpg city

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  #23  
Old 07-09-2006, 04:00 AM
hapaschold hapaschold is offline
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Location: bayville, new jersey, USA
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Quote:
Originally Posted by Prestonia24
First Post Here, let me say I thought I knew a lot about diesels before i bought one lol, (I drive a 2005 Ford E350 Ambulance w/ a PowerStroke Diesel about 2,000 miles a month). Definately knew that i didn't want to drive a Ford Truck (Never have liked them, their diesels don't impress me much)
- but there's always room to learn a bit more, and these forums are filled with information from Diesel owners.

I'm 21 Years old and work as an EMT for a local ambulance company here in SoCal, and just recently purchased a 2006 Chevy Silverado 2500HD w/ the LBZ Duramax 6.6L Diesel, and i'm quite impressed. I'm dwindling down the last quarter of the first tank (the tank the dealer purchased lol) and the DIC is saying i'm only getting 13.5mpg, but hey, i know that the mpg will get better as it gets 'broken in'. My 01 Sierra got 14mpg and i have much more truck than before.

The 6th gear on the new Allison tranny is wonderful, i can cruise down the freeway at 75-80 no sweat, and the acceleration is terrific for a diesel (at the cost of fuel economy, but w/e).

I purchased the truck because i wanted a larger cab and 4x4 capability, for when i go skiing in the winter (my old 2wd w/ snow chains didn't cut the mustard, even for California mountain driving).

I met many Duramax owners before i purchased one myself, and they all told me how wonderful their experience had been with their GM truck.

Plan to put some larger/wider tires and when the Banks aftermarket kits come out for the LBZ Diesels, i'm thinking about changing the exhaust and some aftermarket guages as well.... After all, 360 HP is 'sufficient' at this point, but who knows, i might want 'more' lol....
reset the mpg calculator, you ll see instant increase while running on highway.
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'91 350sdl benz, 3.5l diesel, 28 mpg
'90 560sel benz
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  #24  
Old 07-18-2006, 07:26 PM
D-MAX D-MAX is offline
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Location: Sheridan, Wy. USA
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I have 890 Miles so far and am geting 18.8 mpg, better than my 02 Duramax at the same miles, and my 02 at 58000mi was getting 20 to 21 mpg with a best of 22.6 mpg at 65mph so I hope my 06 will do as good or better!!
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2003 Suburban LT 1500 4X4 (Wife)
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2001 Chevy 2500HD LS 4X4 LB7 CC LB (sold)
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  #25  
Old 07-20-2006, 03:09 AM
jevanb jevanb is offline
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Join Date: Jul 2006
Location: montrose michigan
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filled up yesterday after first tank after dealer, 636miles total, tank was topoff, ran 377miles @ 18.17gals=20.7mpg, truck said i used 20.7gals total=18.2.
I run 56 miles, mostly hwy miles to and from work @70mph about 15 city to get out @ 35mph. A lot better them my 04 cc 4x HD 6.0
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  #26  
Old 07-21-2006, 08:43 AM
nailem nailem is offline
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Join Date: Jul 2006
Posts: 7
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im thinking of buying the new LBZ and all this info has been great. i was woundering what gear ratio you guys had. i heard it makes a big differance in the mpg. im not looking to do any heavy hauling so the 3.42 would work for me. what do you all have?
thanks
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  #27  
Old 07-21-2006, 12:30 PM
jevanb jevanb is offline
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Location: montrose michigan
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373 is all you can get unless u get the 3500. with the 6speed it is geared final to act like a 342
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  #28  
Old 07-21-2006, 02:34 PM
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JohnC JohnC is online now
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Location: New Hampshire - Live Free or Die
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Yeah, the new 6 speed Allison has a double OD too. Can't immagine going any longer, unless you spent all day cruising unloaded at 100 mph...
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Gone but not forgotten: '87 F350 7.3, '91 C2500 6.5, '95 K2500 6.5, '06 K2500HD 6.6
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  #29  
Old 07-26-2006, 04:43 AM
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cowboywildbill cowboywildbill is offline
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Location: USA
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We just picked our 06 D/A 3500 4X4 C/C. It had 28 miles on it. I only drove it about 9 miles and dropped it off at an RV dealer to get a B&W gooseneck hitch installed. The fuel mpg computer said it was getting 9.7 mpg average.
I sure hope that the computer isn't accurate. We were getting an honest 15.8 from our 02 "same model truck" just running around town and not babying it. And 10-13.2 mpg towing. I will have to run a tank of fuel thru the 06 and do the math.
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  #30  
Old 07-26-2006, 08:27 AM
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Quote:
Originally Posted by cowboywildbill
It had 28 miles on it. I only drove it about 9 miles ... The fuel mpg computer said it was getting 9.7 mpg average.
Did you reset it before getting the 9.7 mpg reading? If not, it's factoring in the first 28 miles, where it probably never went faster than 15 mph...
__________________
"Need" - Wanting to get someone else's money.
"Greed" (formerly meant what "need" means today) - wanting to keep your own.
"Compassion" - a politician's willingness to arrange the transfer.
-Joseph Sobran

Current oil burners: MB 350SDL, Kubota 7510
Gone but not forgotten: '87 F350 7.3, '91 C2500 6.5, '95 K2500 6.5, '06 K2500HD 6.6
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