LBZ Fuel Mileage

[JohnC]

If you didn't correct the speedo then your actual miles traveled is greater than indicated by the odometer. This will throw both hand calculations and tthe DIC off toward the low side. Additionally, you could now be looking at winter blended fuel.

If you really got 23 at 70-75mph I'm envious. the best I've been able to manage is 22 at 65 mph. Is yours 2WD?

[BlackMAxx]

No It's 4 wheel drive. And I just went out and got the paper that I wrote on last summer. The highest was 22.7mpg. Right after a fill-up and hit the interstate.

I was told by a guy that he had the gasket around the turbo,(not sure which one) had a crack in it, and he was getting very poor milage.

[larryh1]

I am running the Hypertech. Not real pleased. 16.5 Hwy, 14 city. A speed shop here said the Bullydog is better. I'll wait to read on this forum how it works out. Oh, I am impressed with the towing using the Hypertech. I get 12hwy, but the power delivery and shift points make it very smooth to drive. 30ft toyhauler, loaded with motorcycles and tools.

I am also going to look into exhaust and intake changes. I am already running a K&N filter (only).

Larry

[Fire Escape]

Bone stock (even the tires) 07 Silverado Classic, 4x4, LT3, Crew Cab, Long Bed, now up to 41,000 miles. Best milage 21 mpg calculated - just over 700 miles on one tank of fuel but I was taking it pretty easy on the way home, what with very few fuel stations open at 0200. New Hampshire to Big Pine Key and back in January (4,000+ miles) with a kayak on the roof and a DR 650SE on the rear bumper - 18 mpg calculated. New Hampshire to Daytona and back (2,600 miles) with an 8 1/2x20 trailer and 5 bikes - 11.8 mpg (left in -13F with a big dose of fuel additive to ungel the fuel). New Hampshire to Big Pine Key and back (4,000+ miles) in May with a 16 1/2' boat - 16.5 mpg. I have seen better than 22 mpg for trips but always mix in enough around town stuff to kill the average before refueling, it will get down in the 14 range with enough cold start, shut off in 1/2 mile type driving.

Bruce

[Doccat]

Just took a trip (Ga. to Tenn. and back) I didn't speed and no heavy load. 21mpg. to 22mpg. Stock. Check mileage both ways. The average and miles /gallons. I had order a bully dog before the trip. Just entered the program last night will update later.

[EdHale]

I drove from Spring City, TN to just south of the Atlanta airport last weekend. I drove at 60mph on cruise, no a/c, and was very light on the throttle. The DIC said 23.4 mpg. This is the best I have seen and this was a 208 mile trip.

[moss6]

700 mile round trip through the Texas hill country this week end, for some golf at Horseshoe bay on Lake LBJ. Pretty much constant 76mph except for towns and passing on two lanes where the speed can get up to 95mph to get around quickly in some short passing areas. When we got there we were sitting on 18.2MPG after getting back to Lubbock (about 2,400 feet higher) mileage had dropped to 17.9mpg, both DCI which has always been so accurate that I never check by hand anymore. Speedo is about 2.25mph faster than what the GPS shows so I set cruise by GPS. Rocky Mountain Radar does in fact block the cops radar as is easily seen by the expressions on their faces.
Randy

[TJNE]

I have an 07 classic (all stock) LBZ 66k miles and I get 12-13 mpg around town and 18-19 on a trip. How accurate is the DIC when watching milage? Mine seems low. I expected a little more, any suggestions to squeeze more mpg's?

[DarylB]

Best tank so far 19.02mpg @65mph crusing speed. Going to slow down a bit more this next tank and see if I can squeeze a bit more out

16.5-17mpg average is the norm for me. 28k miles currently.

[sb359]

Vancouver, BC. to Colorado Springs,CO and back, pulling a 6800lb Bigfoot RV 13.2 MPG.(DIC)

[mmcm267]

Just picked up my 07 and driving home on the flat: first tank 19.5 mpg and the seond tank through the mountains between Nashville and Atlanta on I-24 18 .5 mpg. I was running 70-75 (1900-2000 Rpm) in Drive.

I wonder if I shifted to Manual if the TC will stay locked up better?

[TJNE]

How many miles and is is stock? Stock tires, air filter, exhaust, intake, etc.

Just picked up my 07 and driving home on the flat: first tank 19.5 mpg and the seond tank through the mountains between Nashville and Atlanta on I-24 18 .5 mpg. I was running 70-75 (1900-2000 Rpm) in Drive.

I wonder if I shifted to Manual if the TC will stay locked up better?

[mmcm267]

Duh!!! Sorry about that. It is stock with 36K mi. But not for long!!

[gilbert roark]

Friday the abs and brake light came on and the ecm went dead.I tow the truck to a chev on sat. and they said the ecm was fried.any one having this problem.

[joe106]

I think all you guys are full of ****! I have an 06 LBZ with a hypertec, AFE intake, & MBRP cat back exhaust. I do not get on this truck!!! PERIOD. Absolute best around town is 12mpg. on the highway not towing anything I may get maybe 18. SBCC weighs maybe 6500lbs, what gives with all these stories?

[DmaxMaverick]

YMMV. True that.

[NutNbutGMC]

YMMV. True that.

Mine varies to the low side. If I could get even 15 MPG I'd throw a party...

12 MPG + / - is the best it does....regardless of load

.

[JohnC]

Guess I'm full of ****. 16-18 over all, 20-21 highway at 65 mph. Wasn't as good overall when I lived in the mountains.

[gimpyhauler]

I'm in Sacramento, CA presently. I have a LB/CC, 18" rims/tires, and drive to and from my property in South Central Oregon. Over the mountains between and have never averaged less than 17mpg on cruise control at (mostly) 73mph. I haven't taken the trip since getting my BullyDog. I'm waiting to see what the difference will be. (PS: 162,000mi.)

[GMC D-Max]

Not thrilled with my mileage, but I love the truck.

On a 1600mi. trip from Minn. to western Washington, average speed over 70mph... 16mpg.

Mixed driving (about 60% in town, 40% highway)... 14.5.