LBZ Fuel Mileage

[hockeyjac]

I just filled the tank for the first time and I got 17.2 Mpg and that was a combination of City and Highway miles. It includes a 50 minute sit and inch along stretch due to an accident. I am quite pleased. Towing a 8000 lb trailer this week so I will let you know the mileage after this trip.

[EdHale]

I get 20 mpg at 65 mph not towing on average all highway. This past weekend I towed a 9,000 boat (total weight including trailer) with a T-Top 225 miles all highway at 60-65 mph and it got 12 mpg. Not too bad I think. Comments? Ed

[Destroyer]

I get 20 mpg at 65 mph not towing on average all highway. This past weekend I towed a 9,000 boat (total weight including trailer) with a T-Top 225 miles all highway at 60-65 mph and it got 12 mpg. Not too bad I think. Comments? Ed

I towed a car and trailer a Chevy caviler on a Car trailer on dolly. A manual calculation of the fuel showed 15.6 mpg. I have a Banks intake with a Banks Monster exhaust with a Superchip tuner. Lifted 4 inches on 33s. I want to say the car and trailer were around 5500 or so.

[cowboywildbill]

We have about 3200 miles on out 07 CC 3500 dually LBZ, and I can see the milage getting better everyday. Towing or empty. Hope it keeps climbing. I am getting a little better mpg than our 02 did. Last tank 10.7 towing a 40' gooseneck 14,500 lb LQ HT. and 17.3 empty hwy. It drops to 14.5 to 15.5 in town.

[clb33fyxj]

i see around 18-18+ change cruising at 75. truck has 28,000 miles on it and is all stock... for now

[2free2work]

Just hit 11000 miles. We pull a 15K lb fifth-wheel full-time.
Getting avg 10 towing, mixed terrain. Worst was 8.5 uphill
against 40mph breeze.
At 70 on the freeway it's rock solid at 20mpg.

Got to LOVE the Duramax.

[rubylee]

my 2006 2500HD Reg. Cab W/8' bed 4X4 with the Allison auto trans and about 9766 miles on it ( I bought it in July of 06) gets around 15mpg combo. I have been told they need 20K miles before you get the tru mileage. I hear it takes that many miles to break in the engine. I sure hope I can get mileage numbers like some of you other guys are getting. I'm very impressed with the mileage numbers posted.


Rubylee Bruce

[Goofball]

I've got a 2006 2500 HD Crew Cab and my milage has went to crap. I use to get about 16 mpg but out of the blue it has dropped to 13.3 mpg. I don't drive it any different....keep it serviced on time etc....any ideas as to why?? I have 27687 miles on it. Oh yea, and when I pull my Ranger boat now.....10.3 mpg.....never any problems with it but I don't know what has happened to my fuel milage.

Thanks,
Bob

[ChuckZ]

I have a 2006 LBZ (3500 ext. cab) with just over 186000. running empty, at posted speed, she gets 22 to 23. Pulling rvs, no matter what the size, she gets 11 to 12. With the Hypertech, it increases 1.5 mph loaded and 2 mph empty.

[BradL07]

Running unloaded on the highway - meaning not towing anything - I got a high of 19.7 mpg in my '07 LBZ CC SWB 4WD, running 70-75 mph. I think that's the highest mpg I've ever gotten from a 4WD pickup, gas or diesel ('01 LB7).

[Ramster21]

Installed my Edge Juice w/Attitude and getting 19 city and 24 hwy.

[DmaxMaverick]

Installed my Edge Juice w/Attitude and getting 19 city and 24 hwy.

Calculate it by hand, with a calculator if necessary. Try not to cry, the math don't lie (but your DIC will).

[pimajim]

My 2500HD/duramax, allison has gotten 20 empty, 10 towing a 35ft 5th wheel, 15 with a 3000lb camper on its back. Rarely changes unless extreme winds.
City or highway.

[steak2k1]

MT: on level ground - no head nor tail wind
18.5-19mpg

Towing: 5000lb 22' TT, w/4 in the truck and the bed loaded with camping gear and too much Beer..(nahh)
12.6 (oh yea, that was in BC and in the Mountains).

Both Readings with Banks on Level 4.

who cares. Awesome truck and I LOVE it.!! (Drew Carey voice)

cheers,

stk

[DarylB]

Bone stock LBZ, around 3200 miles. First tank that I checked - 18.25

[bpfaeh]

Long time lurker here, but my first post! I picked up my new 2007 GMC Sierra CC 4x4 a couple weeks ago....had 68 miles on the odometer when I picked it up....drove it home from Michigan and got 20.1 hand calc'ed on the highway....combo driving on the last two tanks and got 17.5 both times....Im really happy so far!!

[David Lunsford]

Installed my Edge Juice w/Attitude and getting 19 city and 24 hwy.

What kind of mileage were you getting before the modifications?

Thanks,
David

[David Lunsford]

I've got a 2006 2500 HD Crew Cab and my milage has went to crap. I use to get about 16 mpg but out of the blue it has dropped to 13.3 mpg. I don't drive it any different....keep it serviced on time etc....any ideas as to why?? I have 27687 miles on it. Oh yea, and when I pull my Ranger boat now.....10.3 mpg.....never any problems with it but I don't know what has happened to my fuel milage.

Thanks,
Bob

Hey Bob,
Are you still getting crappie MPG? I've got an 07 sierrra classic crew cab 4x4 an get around 15 mpg hwy at 75 ~ 80 MPH. Pulling 30ft camper only 10mpg.

Thanks,
David

[RichC]

I have an 06 LBZ with 5" Exhaust cat back, Bully Dog Triple Dog Downlaoder. Worst milage I have had on a diesel, including 6.2,3-6.5 and three Duramax. It may have to go. Has 29,000 miles. Got 9 mpg today towing two large containers About 8,000 lbs total. Crappie milage. Want my 02 back.

[DarylB]

I have an 06 LBZ with 5" Exhaust cat back, Bully Dog Triple Dog Downlaoder. Worst milage I have had on a diesel, including 6.2,3-6.5 and three Duramax. It may have to go. Has 29,000 miles. Got 9 mpg today towing two large containers About 8,000 lbs total. Crappie milage. Want my 02 back.

What does it get stock, w/o towing?