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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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#1
03-10-2006, 03:46 PM
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LBZ Fuel Mileage
I was wondering what you guys are seeing for fuel mileage with the new LBZ. I'm thinking about buying one.
Any problems with them?
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2006 Chevy 2500 HD Ext. Cab SB, LLY w/ Alli 6 speed 
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#2
03-10-2006, 04:21 PM
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I am lifted with 35's on and I am getting 13.5 to 15.5 around town with some mixed driving, on winter blend. I only have about 4000 miles on this truck. It is getting a little better as time goes on.
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2001 x cab dark gray sold @50000 NO PROBLEMS<br />2003 D/A CC Marine Mettalic Blue sold @68000 NO PROBLEMS<br />2006 Stealth Gray slt cc LBZ 6inch pro comp lift 315 BFG muds
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#3
03-11-2006, 07:10 AM
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My truck is showroom floor stock. I have 1200 miles now. I am seeing 17.5 city, about 20 highway. Haven't gone on a trip yet to get a good look at highway milage. Like others say, it will get a little better once she brakes in.
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David Proske #418 '06 CHEVY LBZ 2500HD CC LWB '03 GMC 2500HD D/A *sold* :-( '94 K2500HD W/GV OD
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#4
03-13-2006, 11:34 AM
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Just got back from a dirt biking trip. pulling a 6 x 12 enclosed with 4 bikes, gear, tool chest, etc. probably around 3000 pounds. Got an average of 12.2 going 82 mph. This is adjusted for odometer error. Not as good as I had hoped but we were going fast in a lifted pickup. The other truck was an lb7 with the almost identical load, he got just over 13 but he was going around 85 to 86 mph.
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2001 x cab dark gray sold @50000 NO PROBLEMS<br />2003 D/A CC Marine Mettalic Blue sold @68000 NO PROBLEMS<br />2006 Stealth Gray slt cc LBZ 6inch pro comp lift 315 BFG muds
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#5
03-13-2006, 11:21 PM
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My LBZ mpgs are slowly improving. With around 1400 miles on it, I got 17.92 hand calc'ed on a 300+ mile trip into Michigan last Friday running 72-77 mph. No problems whatsoever with mine so far & I like it better than my old LB7.
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'06 GMC LBZ/A CC/SB 4x4
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#6
03-14-2006, 04:17 PM
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5000 mile on it now ... average is just 16.6 mpg on winter blend fuel and its a crew cab 4x4 with a cap , 70 % high way driveing and speeds around 80 mph. It seams like its getting about 1 mpg better then my lly. I will say it has no problem running at 80 where the lly seamed to streach a bit to get to 80. The 2006 allison is the best tuned trans since they started using them in 2001!
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93 c-2500 6.5td,96 6.5td x cab,01 GMC lb7 Xcab ,2004 lly crew cab ,2006 lbz crew cab,honda CBR1100xx,2003 polaris prox 700 , 2001 31' holiday rambler 10K lbs house on wheels!
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#7
03-18-2006, 05:51 AM
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A friend with a new LBZ came up for a visit from Southern CA couple days ago. He just sent me a note to tell me he got 20 mpg on the return trip cruising at 75. I made the same trip in my LB7 a few weeks ago and got 19.26 on the same route at the same speed. I guess that 6th gear helps.
TC
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\'03 Fire Red GMC 2500HD D/A Ex Cab SB 4x4, Leer shell, Husky flaps, Oilguard, Juice, Mufflerectomy, Cat fuel filter, Titan V, Equal-i-zer, Arctic Fox 30U
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#8
03-18-2006, 10:02 AM
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Quote:
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#9
03-18-2006, 05:41 PM
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Well! We here it from the man himself! Welcome aboard amigo.
TC
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\'03 Fire Red GMC 2500HD D/A Ex Cab SB 4x4, Leer shell, Husky flaps, Oilguard, Juice, Mufflerectomy, Cat fuel filter, Titan V, Equal-i-zer, Arctic Fox 30U
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#10
03-28-2006, 07:10 PM
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i only have 5500 miles on mine. and i have a ladder rack on with ladders hanging in the wind, 3 tool boxes bolted to the sides and a full load of freon and heavy tools and supplys..my last tank got me 17.0 mph..i travel at 75mph when on the highway..Oh yea im happier than a pig in $hit...my ole dually 454 got 6mph..
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06 1ton 4X4 duramax/6speed ext.cab WT Hummer wheels :^)
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