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Chevy Silverado and GMC Sierra Duramax Fuel Mileage

505 messages,  Last post on Nov 28, 2009 at 11:02 AM

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What is this discussion about? Chevrolet Silverado 2500HD, Chevrolet Silverado 3500, GMC Sierra 2500HD, GMC Sierra 3500, Diesel, Fuel Efficiency (MPG), Truck

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#479 of 505 0-60 by ozzynmax Jun 02, 2009 (12:52 pm)
is there any printed articles with proof of 0-60 times on a 2005 chevy duramax diesel 2500
#480 of 505 Get a lawyer by jerrydock Jun 03, 2009 (3:33 am)
Stop wasting your time trying to defend yourself and hire a good lawyer. They are worth the money...22 citations...no convictions here.
#481 of 505 On the 0-60 by jbull454GMC Jun 03, 2009 (2:30 pm)
Ozzy, I'd have to agree with Jerry. Get a good laywer, and in addition get a good fuzz buster. I'm waiting to see a Duramax powered police pursuit vehicle. The only time it would be funny is when there is a high speed chase with a sports car and they get run down by an oil burner.
#482 of 505 Re: low fuel rail pressure [jodie1614] by unionman1 Jun 13, 2009 (11:34 am)
Replying to: jodie1614 (Apr 26, 2009 4:43 pm) More that likely you need to change your fuel filter. You might want to increase the blend of diesel vs. oil. I have an 2003 and ran home brew bio the whole time diesel fuel was above $3.00. The fuel filter was the only problem I had.
#483 of 505 Bad mileage on a 2005 by boomd Jul 02, 2009 (8:50 pm)
For some reason I am getting crap for mileage on this 05 silverado 2500.......1500 to the gallon. My last 2500 (an 04) I had, I was getting on the hiway anywhere from 22 to 28! I have bought both used, and I don't know if the 04 was chipped or not, but she was a runner. Any suggestions for the 05. Econ shows 15.5 at 1800 rpm's on the hiway.   Thanks folks,   Boomer Replies to this message: jbull454GMC (Jul 03, 2009 1:10 pm) jerrydock (Jul 05, 2009 3:41 am) boomd (Jul 05, 2009 8:06 pm) boomd (Jul 05, 2009 8:00 pm) vaughninms (Nov 28, 2009 5:16 am)
#484 of 505 Re: Bad mileage on a 2005 [boomd] by jbull454GMC Jul 03, 2009 (1:10 pm)
Replying to: boomd (Jul 02, 2009 8:50 pm) How many miles are on the truck? It may have an injector or turbo problem. Most likely if anything injectors. Replies to this message: jerrydock (Jul 05, 2009 3:41 am) boomd (Jul 05, 2009 8:06 pm) boomd (Jul 05, 2009 8:00 pm)
#485 of 505 Re: Bad mileage on a 2005 [jbull454GMC] by jerrydock Jul 05, 2009 (3:41 am)
Replying to: jbull454GMC (Jul 03, 2009 1:10 pm) You have to take a systematic approach to this.   First comes attention to the drivetrain.   Get high quality filters for the engine, fuel, air and transmission.   Replace all your filters.   Use synthetic oil. I like either Rotella or Amzoil.   Add a bottle of fuel additive to the fuel. I like Lucas; but I am sure there are others that work well.   Now check yout mileage...carefully. I like to do at least 4 tansk in different conditions to get a baseline.   Still nto better?   I would suspect the tires.   I can't begin to tell you what a huge diffference tires can make on a vehicle.   Still no good? You might jsut have a truck that is not going to get good mileage.   I don't know why this happens, but some are just better than others. Replies to this message: boomd (Jul 05, 2009 8:06 pm)
#486 of 505 Re: Bad mileage on a 2005 [jbull454GMC] by boomd Jul 05, 2009 (8:00 pm)
Replying to: jbull454GMC (Jul 03, 2009 1:10 pm) It seems to run very smooth to have an injector problem. Since we bought it I have started to put additives to the fuel.
#487 of 505 Re: Bad mileage on a 2005 [jerrydock] by boomd Jul 05, 2009 (8:06 pm)
Replying to: jerrydock (Jul 05, 2009 3:41 am) OK, thanks.......the tires have been replaced, it goes in this week for filter changes, as that was planned. Synthetic oil?? The truck has 70K so would it hurt the engine to change?? I don't know.........The truck runs very smooth for 70K   Thanks,   Boomer
#488 of 505 late 2010 Duramax by jbull454GMC Aug 10, 2009 (6:17 pm)
I live not far from Morane Ohio where the Dmax plant is. I talked an employee there a few days ago. He told me an interesting story about the new duramax emissions. He said every 6000 mile you will have to pour some find of fluid in the intake to burn off soot in the catalitic convertor. This does not sound like a great selling item. It says on this site abour the new duramax and "pouring" money into it. I guess they weren't kidding...

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