****ed at GM

[DURA-MAX3]

I want to know if GM is going to reprogram our 04.5 model trucks with the new 310hp and 605lb/trq program. I have been unimpressed so far with the mileage and turbo lag that my new truck has had from day one. I think a lot of us are less than happy but won't come right out and say it. I talked to my dealer about this poor mileage and performance and I think that they know there is something wrong but just can't say it. They are checking to see if any thing other than the program was changed. I think it is ****ty to change the power in 1/2 year and screw everyone that bought a new one. If GM dosent care any more about us than that I'll be driving a DODGE CUMMINS so fast it won't even be funny.

[mark45678]

you are talking about 2005 engine specs.... the 04.5 lly only has 590 ft tq in 2,3,4th gear all other gears are 300 hp and 560lbs(same as the lb7)


juice it up, that will change your mind aout being "slow"

[FLEETMANSPH]

Hello everyone, I have been member for a year.
I am an area Fleetmanger, been around diesels
for 26 years.All brands have troubles now and then.My freind has a new Dodge w/ 5.9, Solo he gets 12.7 MPG.All brands 2004.5 are having fuel mileage problems.


PS I have a 2004 GMC LB7

[Cornell]

I have a 2004.5 LLY - The turbo lag is quite annoying at times and the mileage is not as good as a like to to be. But the truck is a fun to drive and I enjoyed it. I have driven the PSD and the Cummins and I think Duramax is the best package if you want to go diesel. I trying to decide if I want to Juice it, I will have to see. ;)

[dieseldealer]

The Duramax mileage improves at 12,000-20,000 miles.

[4diesels]

Don't bet on it improving enough to make you happy. Mine gets about 14mpg mostly highway. My '03 Cummins trucks both get 18-19 under the same conditions.

Problem with expecting economy on the new ones is, it takes fuel to make the power. No matter who builds it, it does take a bunch of fuel to make 600+ ft/lbs of tourque

[LucasEnglish]

In my dad's truck with the Attitude Juice set to 5 all the time he does not tow much. He got 20-23 mpg on his last road trip. This is a 02 crew cab short bed 2500#.

[Cliffee]

I get 17-18 city and 22-23 highway with AC on. Truck is plenty responsive and I haven't added anything other than a UNI Air filter and all sythetic fluids. I did notice a consistent 1-2 mpg increase after switching all fluids to full synthetic including the tranny.