chevy duramax disel

[merwood]

would to hear from owners of these as far towing and mileage thanks in advance for your replies

[rvsixer]

2006 2500HD LBZ SRW 4x4, stock drivetrain, all MPG numbers hand calculated from gas pump volume and GPS mileage numbers (not the stock odo or DIC both of which are quite a bit off and optimistic), 65mph cruise:
5400lb wide/tall TT = 10.7 MPG
Tall hardside TC = 13.2 MPG

Awesome truck (except for the poor excuse of a front end).

[jmaotto]

Just completed a 1500 mile round trip with my 02 Duramax. Round trip average was 11.73 mpg pulling a 30 foot 5th wheel. This set of injectors has 38000 miles. I use 2 stroke oil in each fill of diesel to keep the injectors lubricated.

[Tequila]

Old Duck wrote:
Mine is an 02 LB7, bone stock except the SB air intake I just installed this week (exhaust to come next month). I'm the second owner, purchased it in 05 with 42,000 miles, now has 98,000. Knock on wood, no injector issues yet but I'm planning to check my local dealer to see if they have records of having been replaced. The truck does everything I need and have no plans to make a change and actually prefer this body to the newer style.

After a bunch of research I purchased this to tow a 25'TT about 7000 ills. I'll always remember the first long hill I pulled, was 55mph at the bottom, easily pulled the climb and was at 60 at the top. I was impressed with the DMax. Then I went down the hill, never hitting the brakes and was even more impressed with the Allison tranny.

To help avoid injector issues. look at a FASS lift pump install, I was told part of this issue is poor flirtation and look for a gas additive called Hotshots http://www.hotshotsecret.com/wp-content/uploads/2013/01/HSS-Product-Guide.pdf. Apparently adding that every 6 months also helps. Quite a few videos about it on Truck U.Of course I found all that out after going through 4 sets.

It is unusual for a LB7 to go more than 75,000 K without injector issues. The tip off is white smoke on idle.

My 1st set went at 60K, the second at at 100K and the 3rd at 125K. It is 11 hours labor to get at them which means you need to replace all 8. My last failure I just replaced the one bad one since I had decided to dump the truck & I suspect I got a bad one when I had them changed the previous. I bought a dodge instead which I do not like as much, but its only an hour to change injectors on it.

BTW on my chev I got 14 mpg towing, 21 without a load (highway). I used optilube XPD and found it added at least 1 mpg after several tanks.

[Turtle_n_Peeps]

12, + or - .5 towing fast over 10's of thousands of miles with a 28' TT.
About 17 solo.

[RollandB]

Mine is an 02 LB7, bone stock except the SB air intake I just installed this week (exhaust to come next month). I'm the second owner, purchased it in 05 with 42,000 miles, now has 98,000. Knock on wood, no injector issues yet but I'm planning to check my local dealer to see if they have records of having been replaced. The truck does everything I need and have no plans to make a change and actually prefer this body to the newer style.

After a bunch of research I purchased this to tow a 25'TT about 7000 lbs. I'll always remember the first long hill I pulled, was 55mph at the bottom, easily pulled the climb and was at 60 at the top. I was impressed with the DMax. Then I went down the hill, never hitting the brakes and was even more impressed with the Allison tranny.

[allen8106]

I have a 2013 GMC 2500 HD with the Duramax. I average 12 towing and 17 not towing. These numbers are calculated over 70 tanks of fuel with three 2000 mile round trips to Mesa, AZ towing either my 5ver or a 20 foot cargo trailer.

[Halmfamily]

2008 D/A towing a 14600 of fiver avg 9-10.5 mpg. Bobtail around 16 mpg.

[Olympian_retire]

I have a 2005 lly 6.6 duramax DRW with allison transmission all stock no programs and Mr. Prime runs like a champ why worry about how many miles to the gallon you get you can't control price of diesel so just enjoy it and enjoy your rig remember all trucks have pros and cons they all do the same thing it's what you want and pay for it.

[greende]

Had a 2008 prior to the DRW in my sig. Towed a 30' TT and got 12 MPG.

[edatlanta]

I have the Duramax listed in my signature. It is a late 2006 model and has the LBZ engine which seems to be the one everyone wants. Who knew when I bought it however. I currently have 152,000 on the odo.

I get 12 mpg +/- 0.5 mpg towing the fifth wheel in my sig. I know some will dispute that mileage, but I am a very and I mean very non-aggressive driver. Very moderate power when starting from a dead stop or accelerating and I NEVER tow faster than 60 - not ever.

My motto "I'll get there". I'm retired, what's the hurry.

[ThomasFour]

2008 GMC Sierra 2500 Duramax. 8-10 mpg towing a 23' toy hauler (about 7200 lbs loaded). 12-13 mpg? Must be the newer trucks because I have never gotten near that while towing.

[Rainier]

i pull a 7500lb TT and get 13mpg

[Robbies_grandpa]

Great power and pulls effortlessly. I get betweeen 10 and 12 MPG towing a 10,000 lb. travel trailer.

[azdryheat]

My truck is outstanding at towing and gets 8.5 to 9.5 mpg towing a 17,500 lb toy hauler.

[Tequila]

avoid pre mid 2004, injector issues. speaking from experience 4 sets in 125K miles at $5000 a shot.