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Chevy Silverado and GMC Sierra Duramax Fuel Mileage

506 messages,  Last post on Nov 30, 2009 at 5:21 PM

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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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#145 of 506 Re: Fuel system issues [cashman11185] by robp226 Dec 13, 2005 (7:22 am)
Replying to: cashman11185 (Dec 02, 2005 1:49 pm) This happened to my company '05 2500 between 20-30,000 miles. Finally found out it was the fuel flow regulator valve or sensor. The Dealer replaced the left side fuel rail and it hasn't happened since. The symptom is just as you described and most techs said it was a clogged fuel filter, but I finally found one that looked deeper into the issue. Rob
#146 of 506 Re: towing ability [tcole] by p100 Dec 15, 2005 (7:39 am)
Replying to: tcole (Dec 03, 2005 1:01 pm) To pull 25k pounds on a regular basis you need a commercial truck, IMO. The new Duramax 360 HP engine in a dually pickup would handle it, but the truck itself is simply not large enough for such large trailer loads. I would not try to go over 15K pounds trailer weight with one of those. My $0.02
#147 of 506 Re: warming up a diesel in cold weather. [2k5spdcummins] by ezshift5 Dec 15, 2005 (11:02 am)
Replying to: 2k5spdcummins (Nov 17, 2005 1:40 pm)   2000 Dodge Ram2500 regular cab 4x2 with 5speed.    25mpg hwy (A/C and 70mph) 20mpg city (no A/C) 17-19 City (With A/C) lowest mpg 16.4mpg pulling a 17ft. ski boat rural driving.   ...don't know what Cummins tachs at 70.......   ..but at 55-60 without a/c......your fuel use (non-use actually) would probably not be readily believed....   best, ez... Replies to this message: deiselden (Dec 19, 2005 10:16 am) kcram (Jan 09, 2006 7:33 pm) sbeach1 (Jan 18, 2006 7:44 am) fredk2 (Jan 18, 2006 6:16 pm)
#148 of 506 Fuel Mileage Increase with Magic Pill by deiselden Dec 19, 2005 (10:16 am)
Replying to: ezshift5 (Dec 15, 2005 11:02 am) Has anyone tried the magic pills (Bio-Performance) for increasing your fuel mileage by 35 to 50%? If anyone has any experience with this product, please reply. I am very curious if this will really work? Here is the website for this:   http://www.aceperformance.mybpbiz.com/ Replies to this message: kcram (Jan 09, 2006 7:33 pm)
#149 of 506 Duramax, Rock Solid by 79customd Dec 30, 2005 (9:00 am)
Pulled 6500lbs in the form of a classic truck across NC the other month with my dads 2005 Chevy 2500 HD Crew Cab 4x4. Averaged 16.3mpg!!! That is better than most folks say they get running clean with a Dodge or ford. That Duramax with the Allison 1000 tranny is a perfect marrage for pulling. We use the truck for pulling farm trailers and pulling maybe 4000lbs it averages about 18mpg! Running Clean at 55mph I have hit the 21mpg mark. Amazing for a truck 6000lbs. I dunno as I beleive that that Dodge gets 25 mpg at 70mph with the ac on. The Duramax won't so that makes me suspect about Cummins age old desighn.
#150 of 506 2005 Duramax- Can't get over 10mpg by farmertull Jan 02, 2006 (6:40 pm)
I have 3500 miles on this regular cab that has the Allison. I am a very conservative driver and have always gotten better than average mpg. It runs great but its getting the same mileage as my old 454 but the fuel is higher priced. Replies to this message: donwy (Jan 03, 2006 10:50 pm) lmoore1 (Feb 02, 2006 2:42 pm)
#151 of 506 Re: 2005 Duramax- Can't get over 10mpg [farmertull] by donwy Jan 03, 2006 (10:50 pm)
Replying to: farmertull (Jan 02, 2006 6:40 pm) I have a 2005 crew cab 3/4 ton HD with the Duramax and about 2400 miles on it. Living in Northern Canada, the temperature is cold this time of year but I am still getting 13.8 mpg (US gal.)on winter fuel when doing all city driving in heavy traffic and about 17 mpg on the highway with two passengers and no load. Sounds like you have a problem. Replies to this message: lmoore1 (Feb 02, 2006 2:42 pm)
#153 of 506 Fuel Mileage Increase using additives by clongwell Jan 06, 2006 (3:41 pm)
I would hope people realize the clever marketing behind all of those outrageous claims of increased fuel mileage from these fuel additives.   The last two links were two products that claim alot. Both sites spend as much time trying to get you to sell their product than use it. Come on people...putting a giant pill in your gas tank. Are you kidding me! The last one is talking about CNBC World Business Review with Alexander Haig. It is well known that production costs for WBR are paid for by the company that wants there product on air. Please save your money.   You want to save gas...drive down the freeway at 55mph and don't show off your trucks power at every intersection.   Smoke and Mirrors...Smoke and Mirrors. Replies to this message: smartmpg (Jan 21, 2006 7:03 am)
#154 of 506 Re: Fuel Mileage Increase with Magic Pill [smartmpg] by kcram HOST Jan 09, 2006 (7:33 pm)
Please do not post phone numbers or any other contact information... this is against the rules, and opens you up for abuse as well.   kcram - Pickups Host

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