Absolutely terrible gas mileage. - Page 3

PULRIG · 06-27-2009, 05:53 AM

I haven't heard of this "Mouthpiece" mod. can you give me some more info?

**Hook'em_Horns!** · 06-27-2009, 06:02 AM

Quote:

Originally Posted by PULRIG

I haven't heard of this "Mouthpiece" mod. can you give me some more info?

Attention: All LLY Owners

dogmerr · 06-27-2009, 07:19 AM

what are you referring to when you mention "moouthpiece"? I am new to the diesel game with a 2008 Chevy CC, standard bed Z71 package.

PULRIG · 06-27-2009, 07:54 AM

Thanks for the info. Killerbee has the best info and pictures to explain the LLY MP problems.
I will definatly be making the mod!

**Johnasara** · 06-27-2009, 07:56 AM

Quote:

Originally Posted by dogmerr

what are you referring to when you mention "moouthpiece"? I am new to the diesel game with a 2008 Chevy CC, standard bed Z71 package.

You do not have to worry about it with the LMM motor.

dogmerr · 06-27-2009, 08:01 AM

Quote:

Originally Posted by Johnasara

You do not have to worry about it with the LMM motor.

Thanks for the reply. Looks like I have a lot of "lingo" to learn.

dogmerr · 06-27-2009, 08:29 AM

Quote:

Originally Posted by dogmerr

Thanks for the reply. Looks like I have a lot of "lingo" to learn.

What does "LMM" stand for?

**Johnasara** · 06-27-2009, 08:36 AM

Nothing it is the generation of motor you have in the truck. Use the search option at the top on the tool bar it will open you up to a whole new wrold of information. Just try not to overload your brain!!!LOL

RoyB · 07-02-2009, 03:49 PM

I just purchased an 06 GMC 2500 4x4 with 120,000 miles. It appears to be completely stock except for an AFE stage 2 intake that is missing the top cover (filter is exposed when you open the hood). After I purchased it i brought it to the dealer and had them go through the entire truck ($3000) and change all fluids, flush everything, and inspect everything. I just towed my 7K pound travel trailer from Houston to Bakersfield and averaged 7 to 8 mpg when towing. I get around 17 on the highway when not towing. What gives, the fuel costs is killing me? The only thing that I can think is that the top of the airbox is missing and their seems to be a slight humm that I think is coming from the front diff at low speeds. Anyone have any ideas?

Savington · 07-02-2009, 04:00 PM

Quote:

Originally Posted by PULRIG

If you are smart about building the truck, build it for what you intend to use it for, and keep your foot out of it, you should be able to get everything you want out of your truck. (Milage and Performance)

I built a race car. I don't want to build a truck.

Last tank was 12.9mpg, hand calculated, towing a 2000lb flatbed with my 2100lb Miata on it. My friend with an '07 5.9 Cummins just told me he gets 24 unloaded and 18.5 pulling the same load.